Multiquip Portable Generator DCA 125USJ User Manual

PARTS AND OPERATION MANUAL  
OPERATION AND PARTS MANUAL  
ULTRA-SILENTTM SERIES  
MODEL DCA-125USJ  
50 Hz GENERATOR  
PARTS LIST NO. M3870400004  
Revision #0 (03/11/05)  
THIS MANUAL MUST ACCOMPANY  
THE EQUIPMENT AT ALLTIMES.  
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PAGE 2 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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HERE'S HOW TO GET HELP  
PLEASE HAVETHE MODEL AND SERIAL  
NUMBER ON-HANDWHEN CALLING  
MQ POWER CORPORATE OFFICE  
18910 Wilmington Ave.  
Carson, CA 90746  
800-421-1244  
FAX:310-632-2656  
PARTS DEPARTMENT  
800-427-1244  
310-537-3700  
FAX:800-672-7877  
FAX:310-637-3284  
SERVICE DEPARTMENT  
800-835-2551  
FAX:310-638-8046  
310-537-3700  
TECHNICAL ASSISTANCE  
800-478-1244  
WARRANTYDEPARTMENT  
800-835-2551,EXT.279  
310-537-3700,EXT.279  
FAX:310-631-5032  
FAX:310-638-8046  
© COPYRIGHT 2005, MULTIQUIP INC.  
MQ Power Inc, Ultra-Silent series, and the MQ Power logo are registered trademarks of Multiquip Inc. and may not be used,  
reproduced, or altered without written permission.All other trademarks are the property of thier respective owners and used with  
permission.  
This manual MUST accompany the equipment at all times. This manual is considered a permanent part of the equipment and  
should remain with the unit if resold.  
The information and specifications included in this publication were in effect at the time of approval for printing. Illustrations are  
based on the DCA-125USJ (50 HZ)Ultra Silent Generator.Multiquip Inc.reserves the right to discontinue or change specifications,  
design or the information published in this publication at any time without notice and without incurring any obligations.  
To find the latest revision of this  
publication, visit our website at:  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 3  
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TABLE OF CONTENTS  
MQ POWER DCA12USJ  
AC GENERATOR  
COMPONENT DRAWINGS  
Generator Assembly.................................................. 56-57  
Control Box Assembly............................................... 58-61  
Engine & Radiator Assembly..................................... 62-65  
Output Terminal Assembly......................................... 66-67  
Battery Assembly ...................................................... 68-69  
Muffler Assembly ...................................................... 70-71  
Fuel Tank Assembly .................................................. 72-73  
Enclosure #1 Assembly ............................................ 74-77  
Enclosure #2 Assembly ............................................ 78-79  
Rubber Seals Assembly ............................................ 80-81  
Nameplate and Decals .............................................. 82-83  
California Proposition 65 Warning .....................................2  
Here's How To Get Help ....................................................3  
Table Of Contents .............................................................4  
Parts Ordering Procedures ...............................................5  
Specifications ................................................................... 6  
Dimensions (Top, Side, Front) .......................................... 7  
Safety Message Alert Symbols ....................................8-9  
Rules for Safe Operation ........................................... 10-13  
Installation ................................................................. 14-15  
Towing Safety Precaution ............................................... 16  
Trailer Specifications ...................................................... 17  
Generator Decals....................................................... 18-19  
General Information ........................................................ 20  
Major Components ......................................................... 21  
Generator Control Panel ................................................. 23  
Engine Operating Panel ............................................. 24-25  
OutputTerminal Panel Familiarization ........................ 26-28  
Load Application ............................................................. 29  
Generator Outputs ..................................................... 30-31  
Gauge Reading ............................................................... 31  
OutputTerminal Panel Connections ........................... 32-33  
Pre Setup .................................................................. 34-37  
Generator Start-up Procedure (Manual) ..................... 38-40  
Generator Start-up Procedure (Auto Mode) .................... 41  
Generator Shut-Down Procedure .................................... 42  
Maintenance .............................................................. 43-45  
Trailer Brakes Maintenance ............................................ 46  
Trailer Maintenance.................................................... 47-48  
TrailerWiring Diagram ..................................................... 49  
Generator Wiring Diagram ............................................... 50  
Engine Wiring Diagram ................................................... 51  
GeneratorTroubleshooting .............................................. 52  
Engine ControllerTroubleshooting ................................... 53  
Explanation of Code in Remarks Column ....................... 54  
Suggested Spare Parts .................................................. 55  
Terms and Condition of Sale — Parts ............................ 84  
Specification and part  
number are subject to  
NOTE  
change without notice.  
PAGE 4 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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PARTS ORDERING PROCEDURES  
When ordering parts,  
please supply the following information:  
Dealeraccountnumber  
Dealernameandaddress  
Shipping address (if different than billing address)  
Returnfaxnumber  
Applicable model number  
Quantity,part number and description of each part  
Specifypreferredmethodofshipment:  
FedEx or UPS Ground  
FedEx or UPS Second Day or Third Day  
FedEx or UPS Next Day  
Federal Express Priority One  
DHL  
Note:Unlessotherwiseindicatedbycustomer, all  
orders are treated as “Standard Orders”, and will  
ship within 24 hours.We will make every effort to  
ship “Air Shipments” the same day that the order is  
received, if prior to 2PM west coast time. “Stock  
Orders” must be so noted on fax or web forms.  
Truck  
Place Your Parts Order Via Web or Fax  
For Even More Savings!  
Here’s how to get help...  
Please have the model and serial number  
on hand when calling.  
(Domestic USA Dealers Only)  
MQ POWER CORPORATE OFFICE  
18910 Wilmington Ave.  
Carson, CA 90746  
800-421-1244  
FAX: 310-632-2656  
Extra Discounts!  
All parts orders which include complete part numbers and  
are received by our automated web parts order system, or  
by fax qualify for the following extra discounts:  
Ordered  
via  
Standard  
orders  
Stock orders  
PARTS DEPARTMENT  
800-427-1244  
310-537-3700  
SERVICE DEPARTMENT  
800-835-2551  
310-537-3700  
TECHNICAL ASSISTANCE  
800-478-1244  
WARRANTY DEPARTMENT  
800-835-2551, EXT. 279  
310-537-3700, EXT. 279  
($750 list and above)  
FAX: 800-672-7877  
FAX: 310-637-3284  
Fax  
3%  
5%  
10%  
10%  
Web  
FAX: 310-638-8046  
Special freight allowances  
when you order 10 or more  
line items via Web or Fax!**  
FedEx Ground Service at no charge for freight  
No other allowances on freight shipped by any other carrier.  
FAX: 310-631-5032  
FAX: 310-638-8046  
**Common nuts, bolts and washers (all items under $1.00  
list price) do not count towards the 10+ line items.  
NOTE:DISCOUNTSARESUBJECTTOCHANGE  
MQPOWER  
Direct TOLL-FREE access  
to our Parts Department:  
Toll-free nationwide — 800-427-1244  
ADivisionofMultiquipInc.  
POST OFFICE BOX 6254  
CARSON, CA 90749  
310-537-3700 • 800-421-1244  
FAX:310-632-2656  
INTERNET:www.mqpower.com  
Toll-free FAX — 800-6-PARTS-7 (800/672-7877)  
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 5  
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DCA-125USJ (50 HZ)— SPECIFICATIONS  
Table 1. Generator Specifications  
Model  
Type  
DCA125USJ  
Revolving field, self ventilated, open protected type synchronous  
generator  
Armature Connection  
Phase  
Star with Neutral  
3
Zig Zag  
Single  
Standby Output  
Prime Output  
Voltage  
110 KVA (88 KW)  
100 KVA (80 KW)  
200V or 400V  
63 KW  
58 KW  
200/100V  
Frequency  
Speed  
50 Hz  
1500 rpm  
Power Factor  
Aux. AC Power  
Voltage  
0.8  
1
Single Phase, 50 Hz  
100 V  
Output  
4.8 KW (2.4 KW x 2)  
Table 2. Engine Specifications  
Model  
Type  
JOHN DEERE 6068TF 275  
4 cycle, water-cooled, direct injection, turbo-charged  
6 cylinders  
No. of Cylinders  
Bore x Stroke  
Rated Output  
Displacement  
Starting  
4.19 in. x 5 in. (106 mm x 127 mm)  
150 HP/1500 rpm  
415 cu. in. (6,800 cc)  
Electric 12VDC  
Coolant Capacity  
Lube Oil Capacity  
Fuel Type  
4.4 gal. (16.8 liters)  
5.3 gal. (18.9 liters)  
#2 Diesel Fuel  
Fuel Tank Capacity  
169 gal. (640 liters)  
6.1 gal. (23.2 L)/hr at full load  
3.0 gal. (11.3 L)/hr at 1/2 load  
4.6 gal. (17.5 L)/hr at 3/4 load  
2.0 gal. (7.5 L)/hr at 1/4 load  
Fuel Consumption  
Battery  
12V BCI Group 46  
PAGE 6 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— DIMENSIONS (TOP, SIDE AND FRONT)  
Figure 1. Dimensions  
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DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 7  
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DCA-125USJ (50 HZ) — SAFETY MESSAGE ALERT SYMBOLS  
FORYOUR SAFETY ANDTHE SAFETY OF OTHERS!  
HAZARD SYMBOLS  
Lethal Exhaust Gases  
Engine exhaust gases contain poisonous  
Safety precautions should be followed at all times when operating  
this equipment. Failure to read and understand the Safety  
Messages and Operating Instructions could result in injury to  
yourself and others.  
carbon monoxide. This gas is colorless and  
odorless, and can cause death if inhaled.  
NEVER operate this equipment in a confined  
area or enclosed structure that does not  
provide ample free flow air.  
This Owner's Manual has been  
developed to provide complete  
NOTE  
instructions for the safe and  
efficient operation of the  
MQ Power Model DCA-125USJ  
(50  
HZ)ULTRA-SILENT™  
Explosive Fuel  
GENERATOR.  
Diesel fuel is extremely flammable, and its  
vapors can cause an explosion if ignited. DO  
NOT start the engine near spilled fuel or  
combustible fluids. DO NOT fill the fuel tank  
while the engine is running or hot. DO NOT  
overfill tank, since spilled fuel could ignite if it  
comes into contact with hot engine parts or  
sparks from the ignition system. Store fuel in  
approved containers, in well-ventilated areas  
and away from sparks and flames. NEVER  
use fuel as a cleaning agent.  
Before using this GENERATOR, ensure that the operating  
individual has read and understands all instructions in this  
manual.  
SAFETY MESSAGE ALERT SYMBOLS  
The three (3) Safety Messages shown below will inform you  
about potential hazards that could injure you or others. The  
Safety Messages specifically address the level of exposure to  
the operator, and are preceded by one of three words: DANGER,  
WARNING, or CAUTION.  
Burn Hazards  
DANGER: You WILL be KILLED or  
SERIOUSLY injured if you DO NOT follow  
directions.  
Engine components can generate extreme heat.  
To prevent burns, DO NOT touch these areas  
while the engine is running or immediately after  
operations. NEVER operate the engine with  
heat shields or heat guards removed.  
WARNING: You CAN be KILLED or  
SERIOUSLY injured if you DO NOT follow  
directions.  
Rotating Parts  
NEVER operate equipment with covers, or  
guards removed. Keep fingers, hands, hair  
and clothing away from all moving parts to  
prevent injury.  
CAUTION: You CAN be injured if you  
DO NOT follow directions.  
Potential hazards associated with trowel operation will be  
referenced with "Hazard Symbols" which appear throughout  
this manual, and will be referenced in conjunction with Safety  
"Message Alert Symbols".  
PAGE 8 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ) — SAFETY MESSAGE ALERT SYMBOLS  
Accidental Starting  
Respiratory Hazard  
ALWAYS place the engine ON/OFF switch  
in the OFF position, when the trowel is not  
in use.  
ALWAYS wear approved respiratory protection.  
Over Speed Conditions  
Sight and Hearing hazard  
NEVER tamper with the factory settings of the  
engine governor or settings. Personal injury  
and damage to the engine or equipment can  
result if operating in speed ranges above  
maximum allowable.  
ALWAYS wear approved eye and hearing  
protection.  
Equipment Damage Messages  
Other important messages are provided throughout this manual  
to help prevent damage to your trowel, other property, or the  
surrounding environment.  
This generator, other property, or  
the surrounding environment could  
be damaged if you do not follow  
instructions.  
NOTE  
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DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 9  
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DCA-125USJ (50 HZ) — RULES FOR SAFE OPERATION  
CAUTION  
:
NEVER touch the hot exhaust  
manifold, muffler or cylinder. Allow  
these parts to cool before servicing  
engine or generator.  
Failure to follow instructions in this manual may  
lead to serious injury or even death! This  
equipment is to be operated by trained and  
qualified personnel only!This equipment is for  
industrial use only.  
The following safety guidelines should always be used when  
operating the DCA-125USJ (50 HZ)Generator:  
High Temperatures – Allow the engine to cool before  
performing service and maintenance functions. Contact  
with hot! components can cause serious burns.  
GENERAL SAFETY  
DO NOT operate or service this equipment  
The engine of this  
generator requires an  
before reading this entire manual.  
adequate free flow of  
cooling air. NEVER  
operate the generator  
in any enclosed or  
narrow area where free  
flow of the air is  
restricted. If the air flow  
is restricted it will  
This equipment should not be operated by persons under 18  
years of age.  
NEVER operate this equipment without proper  
protective clothing, shatterproof glasses, steel-  
toed boots and other protective devices required  
by the job.  
cause serious damage to the generator or engine and  
may cause injury to people. The generator engine gives  
off DEADLY carbon monoxide gas.  
ALWAYS make sure generator is properly grounded.  
NEVER use gas piping as an electrical ground.  
NEVER operate this equipment when not feeling  
well due to fatigue, illness or taking medicine.  
DO NOT place hands or fingers inside generator engine  
compartment when engine is running.  
NEVER operate this equipment under the  
influence or drugs or alcohol.  
ALWAYS make sure generator installation is accordance with  
national and local electrical codes.  
ALWAYS have a qualified electrician perform the generator  
wiring installation.  
NEVER use accessories or attachments, which are not  
recommended by MQ Power for this equipment. Damage to  
the equipment and/or injury to user may result.  
NEVER power cables or cords lay in water.  
NEVER stand in water while AC power from the generator  
is being transfer to a load.  
Manufacture does not assume responsibility for any accident  
due to equipment modifications.  
NEVER use a defective or frayed power cable. Check the  
cable for cuts in the insulation.  
Whenever necessary, replace nameplate, operation and  
safety decals when they become difficult read.  
NEVER use a extension cord that is frayed or damaged where  
the insulation has been cut.  
ALWAYS check the machine for loosened threads or bolts  
before starting.  
ALWAYS make certain that proper extension cord has been  
selected for the job SeeTable 5.  
NEVER operate the generator in an explosive atmosphere or  
near combustible materials. An explosion or fire could result  
causing severe bodily harm or even death.  
The electrical voltage required to operate the generator can  
cause severe injury or even death through physical contact  
with live circuits. Turn all circuit breakers OFF before  
performing maintenance on the generator.  
PAGE 10 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ) — RULES FOR SAFE OPERATION  
.
ALWAYS make sure that electrical circuits are properly  
grounded per the National Electrical Code (NEC) and local  
codes before operating generator.Severe injury or death! by  
electrocution can result from operating an ungrounded  
generator.  
DANGER  
:
ALWAYS be sure the operator is familiar with proper safety  
precautions and operations techniques before using generator.  
ALWAYS store equipment properly when it is not being used.  
Equipment should be stored in a clean, dry location out of the  
reach of children.  
Backfeed to a utility system can cause electrocution and or  
property damage. DO NOT connect to any building's electrical  
system except through an approved device or after building  
main switch is opened. ALWAYS have a licensed electrician  
perform the installation  
ALWAYS read, understand, and follow  
procedures in Operator’s Manual before  
attempting to operate equipment.  
DANGER  
:
CAUTION  
:
Never use damaged or worn cables when  
connecting equipment to the generator.  
Make sure power  
DO NOT touch or open any of the below  
mentioned components while the generator  
is running. Always allow sufficient time for  
the engine and generator to cool before  
performing maintenance.  
c o n n e c t i n g  
cables are securely connected to  
the generator’s output terminals,  
insufficient tightening of the  
terminal connections may cause  
damage to the generator and  
electrical shock.  
Radiator  
1. Radiator Cap - Removing the radiator cap while the engine  
is hot will result in high pressurized, boiling water to gush  
out of the radiator, causing severe scalding to any persons  
in the general area of the generator.  
WET  
HANDS  
2. Coolant Drain Plug - Removing the coolant drain plug  
while the engine is hot will result in hot coolant to gush out  
of the coolant drain plug, therefore causing severe scalding  
to any persons in the general area of the generator.  
DANGER  
:
NEVER grab or  
touch live  
a
power cord with  
wet hands , the  
possibility exists  
3. Engine Oil Drain Plug - Removing the engine oil drain  
plug while the engine is hot will result in hot oil to gush out  
of the oil drain plug, therefore causing severe scalding to  
any persons in the general area of the generator.  
POWER  
CORD  
(POWER ON)  
of electrical shock, electrocution, and even death!  
Maintenance Safety  
DANGER  
:
NEVER lubricate components or attempt service on a running  
machine.  
ALWAYS allow the machine a proper  
amount of time to cool before servicing.  
NEVER touch output terminals during operation. This is  
Keep the machinery in proper running condition.  
extremely dangerous. ALWAYS stop the machine and  
place the circuit breaker in the “OFF” position when contact  
with the output terminals is required. There exists the  
possibility of electrocution, electrical shock or burn,  
which can cause severe bodily harm or even death!  
Fix damage to the machine immediately and always replace  
broken parts.  
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DCA-125USJ (50 HZ)— RULES FOR SAFE OPERATION  
Battery  
NEVER run engine without air filter.Severe engine damage  
may occur.  
The battery contains acids that can cause injury to the eyes  
and skin.To avoid eye irritation, always wear safety glasses.  
Use well insulated gloves when picking up the battery. Use  
the following guidelines when handling the battery:  
ALWAYS service air cleaner frequently to prevent engine  
malfunction.  
ALWAYS disconnect the negative battery terminal before  
performing service on the generator.  
ALWAYS be sure the operator is familiar with proper safety  
precautions when operating the generator set.  
ALWAYS store equipment properly when not in use.  
1. DO NOT drop the battery. There is the possibility of risk  
DO NOT leave the generator running in the manual mode  
unattended.  
that the battery may explode.  
2. DO NOT expose the battery to  
open flames, sparks, cigarettes  
etc. The battery contains  
combustible gases and liquids. If  
these gases and liquids come in  
contact with a flame or spark, an  
explosion could occur.  
DO NOT allow unauthorized people to operate this  
equipment.  
ALWAYS read, understand, and follow procedures in  
Operator’s Manual before attempting to operate equipment.  
Refer to the John Deere Engine Owner's Manual for  
engine technical questions or information.  
3. ALWAYS keep the battery charged. If the battery is not  
DANGER:  
charged a buildup of combustible gas will occur.  
Pay close attention to  
ventilation when operating  
the generator inside  
tunnels and caves. The  
engine exhaust contains  
4. ALWAYS keep battery charging and cables in good working  
condition. Repair or replace all worn cables.  
5. ALWAYS recharge the battery in an vented air  
environment, to avoid risk of a dangerous concentration  
of combustible gases.  
noxious elements. Engine exhaust must  
6. In case the battery liquid (dilute sulfuric acid) comes in  
contact with clothing or skin, rinse skin or clothing  
immediately with plenty of water.  
be routed to a ventilated area.  
Generator Grounding  
7. In case the battery liquid (dilute sulfuric acid) comes in  
contact with your eyes, rinse eyes immediately with plenty  
of water, then contact the nearest doctor or hospital, and  
seek medical attention.  
To guard against electrical shock and possible damage to  
the equipment, it is important to provide a good EARTH  
ground.  
Article 250 (Grounding) of the National Electrical Code  
(NEC) provides guide lines for proper grounding and specifies Transporting  
that the cable ground shall be connected to the grounding  
system of the building as close to the point of cable entry  
as practical.  
ALWAYS shutdown engine before transporting.  
Tighten both fuel tank caps securely.  
If generator is mounted on a trailer, make sure trailer  
complies with all local and state safety transportation  
laws. See next page “Towing Safety Precautions” for  
basic towing techniques.  
ALWAYS be sure to use the ground terminal (green wire)  
when connecting a load to the UVWO output terminals.  
PAGE 12 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— RULES FOR SAFE OPERATION  
Avoid sharp turns.  
Towing Safety Precautions  
Trailer should be adjusted to a level position at all times  
when towing.  
CAUTION:  
Raise and lock trailer wheel stand in up position when  
transporting.  
Conform to Department ofTransportation  
(DOT) SafetyTowing Regulations before  
towing generator.  
DOT Requirements include the following:  
z
z
Connect and test electric brake operation.  
Secure portable power cables in cable tray with  
tie wraps.  
To reduce the possibility of an accident while transporting  
the generator on public roads, always make sure the trailer  
that supports the generator and the towing vehicle are in  
good operating condition and both units are mechanically  
sound.  
Emergencies  
ALWAYS know the location of the nearest fire extinguisher.  
The following list of suggestions should be used when towing  
your generator:  
Make sure the hitch and coupling of the towing vehicle  
are rated equal to, or greater than the trailer "gross vehicle  
weight rating.”  
ALWAYS know the location of the nearest and first aid kit.  
ALWAYS inspect the hitch and coupling for wear. NEVER  
tow a trailer with defective hitches, couplings, chains  
etc.  
Check the tire air pressure on both towing vehicle and  
trailer. Trailer tires should be inflated to 50 psi cold.  
Also check the tire tread wear on both vehicles.  
In emergencies always know the location of the  
nearest phone or keep a phone on the job site.  
Also know the phone numbers of the nearest  
ambulance, doctor and fire department. This  
information will be invaluable in the case of an  
emergency.  
ALWAYS make sure the trailer is equipped with a "Safety  
Chain".  
ALWAYS attach trailer’s safety chains to towing vehicle  
properly.  
ALWAYS make sure the vehicle and trailer directional,  
backup, brake, and trailer lights are connected and  
working properly.  
The maximum speed for highway towing is 55 MPH  
unless posted otherwise. Recommended off-road towing  
is not to exceed 15 MPH or less depending on type of  
terrain.  
Place chock blocks underneath wheel to prevent rolling,  
while parked.  
Use the trailer’s swivel jack to adjust the trailer height to  
a level position while parked.  
Avoid sudden stops and starts.This can cause skidding,  
or jack-knifing. Smooth, gradual starts and stops will  
improve towing.  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 13  
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DCA-125USJ (50 HZ)— INSTALLATION  
Figure 2. Typical Generator Grounding Application  
PAGE 14 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— INSTALLATION  
Outdoor Installation  
Generator Grounding  
Install the generator in a area that is free of debris, To guard against electrical shock and possible damage to  
bystanders, and overhead obstructions. Make sure the the equipment, it is important to provide a good EARTH  
generator is on secure level ground so that it cannot slide or ground.  
shift around. Also install the generator in a manner so that  
Article 250 (Grounding) of the National Electrical Code (NEC)  
the exhaust will not be discharged in the direction of nearby  
provides guide lines for proper grounding and specifies that  
homes.  
the cable ground shall be connected to the grounding system  
The installation site must be relatively free from moisture of the building as close to the point of cable entry as  
and dust. All electrical equipment should be protected from practical.  
excessive moisture. Failure to do will result in deterioration  
of the insulation and will result in short circuits and grounding.  
grounding requirements:  
NEC articles 250-64(b) and 250-66 set the following  
Foreign materials such as dust, sand, lint and abrasive  
1. Use one of the following wire types to connect the  
materials have a tendency to cause excessive wear to  
generator to earth ground.  
engine and alternator parts.  
a. Copper - 10 AWG (5.3 mm2) or larger.  
b. Aluminum - 8 AWG (8.4 mm2) or larger.  
CAUTION  
:
2. When grounding the generator (Figure 2) connect the  
ground cable between the lock washer and the nut on  
the generator and tighten the nut fully.Connect the other  
end of the ground cable to earth ground.  
Pay close attention to ventilation when  
operating the generator inside tunnels and  
caves. The engine exhaust contains  
noxious elements. Engine exhaust must be  
routed to a ventilated area.  
3. NEC article 250-52(c) specifies that the earth ground  
rod should be buried aminimum of 8 ft. into the ground.  
Indoor Installation  
When connecting the generator to  
Exhaust gases from diesel engines are extremely poisonous.  
Whenever an engine is installed indoors the exhaust fumes  
must be vented to the outside.The engine should be installed  
at least two feet from any outside wall. Using an exhaust  
pipe which is too long or too small can cause excessive  
back pressure which will cause the engine to heat  
excessively and possibly burn the valves.  
any buildings electrical system  
ALWAYS consult with a licensed  
electrician.  
NOTE  
Mounting  
The generator must be mounted on a solid foundation (such  
as concrete) and set firmly on the foundation to isolate  
vibration of the generator when it is running. The generator  
must set at least 6 inches above the floor or grade level (in  
accordance to NFPA 110, Chapter 5-4.1). DO NOT remove  
the metal skids on the bottom of the generator. They are to  
resist damage to the bottom of the generator and to maintain  
alignment.  
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DCA-125USJ (50 HZ)TOWING SAFETY PRECAUTIONS  
Towing Safety Precautions  
ALWAYS attach trailer’s safety chain to bumper of towing  
vehicle.  
CAUTION  
:
ALWAYS make sure the vehicle and trailer directional,  
backup, brake, and trailer lights are connected and  
working properly.  
Check with your local county or state safety  
towing regulations before towing your  
generator.  
The maximum speed for highway towing is 55 MPH  
unless posted otherwise. Recommended off-road towing  
is not to exceed 15 MPH or less depending on type of  
terrain.  
To reduce the possibility of an accident while transporting  
the generator on public roads, always make sure the trailer  
(Figure 4) that supports the generator and the towing vehicle  
are in good operating condition and both units are  
mechanically sound.  
Place chocked blocks underneath wheel to prevent  
rolling, while parked.  
Place support blocks underneath the trailer’s bumper to  
prevent tipping, while parked.  
The following list of suggestions should be used when towing  
your generator:  
Use the trailer’s hand winch to adjust the height of the  
trailer, then insert locking pin to lock wheel stand in place,  
while parked.  
Make sure the hitch and coupling of the towing vehicle  
are rated equal to, or greater than the trailer "gross vehicle  
weight rating" (GVWR).  
Avoid sudden stops and starts. This can cause skidding,  
or jackknifing. Smooth, gradual starts and stops will  
improve gas milage.  
ALWAYS inspect the hitch and coupling for wear.NEVER  
tow a trailer with defective hitches, couplings, chains  
etc.  
Avoid sharp turns to prevent rolling.  
Check the tire air pressure on both towing vehicle and  
trailer. Also check the tire tread wear on both vehicles.  
Remove wheel stand when transporting.  
DO NOT transport generator with fuel in tank.  
ALWAYS make sure the trailer is equipped with a "Safety  
Chain".  
Figure 3. Generator with Trailer  
PAGE 16 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)TRAILER SPECIFICATIONS  
5. Frame Width - Measurement is from fender to fender  
6. Jack Stand - Trailer support device with maximum pound  
CAUTION  
:
ALWAYS make sure the trailer is in good  
operating condition. Check the tires for  
proper inflation and wear. Also check the  
wheel lug nuts for proper tightness.  
requirement from the tongue of the trailer.  
7. Coupler - Type of hitch used on the trailer for towing.  
8. Tire Size - Indicates the diameter of the tire in inches  
(10,12,14, etc.), and the width in millimeters  
(175,185,205, etc.). The tire diameter must match the  
diameter of the tire rim.  
Explanation of Chart:  
This section is to provide the user with trailer service and  
maintenance information. The service and maintenance  
guidelines referenced in this section apply a wide range of  
trailers. Remember periodic inspection of the trailer will en-  
sure safe towing of the equipment and will prevent damage  
to the equipment and personal injury.  
9. Tire Ply - The tire ply (layers) number is rated in letters;  
2-ply,4-ply,6-ply, etc.  
10. Wheel Hub - The wheel hub is connected to the trailer’s  
axle.  
11. Tire Rim - Tires mounted on a tire rim. The tire rim must  
match the size of the tire.  
12. Lug Nuts - Used to secure the wheel to the wheel hub.  
Always use a torque wrench to tighten down the lug nuts.  
See Table 17 and Figure 67 for lug nut tightening and  
sequence.  
It is the purpose of this section to cover the major mainte-  
nance components of the trailer. The following trailer com-  
ponents will be discussed in this section:  
„
„
„
„
„
„
Brakes  
13. Axle - Indicates the maximum weight the axle can sup-  
port in pounds, and the diameter of the axle expressed  
in inches. Please note that some trailers have a double  
axle. This will be shown as 2-6000 lbs., meaning two  
axles with a total weight capacity of 6000 pounds.  
Tires  
Lug NutTorquing  
Suspension  
Electrical  
14. Suspension - Protects the trailer chassis from shocks  
transmitted through the wheels. Types of suspension  
used are leaf, Q-flex, and air ride.  
BrakeTroubleshootingTables  
Use the following definitions when reading Table 2.  
1. Fuel Cell - Provides an adequate amount of fuel for the  
equipment in use. Fuel cells must be empty when trans-  
porting equipment.  
15. Electrical - Electrical connectors (looms) are provided  
with the trailer so the brake lights and turn signals can  
be connected to the towing vehicle.  
2. Braking System - System employed in stopping the  
trailer. Typical braking systems are electric, surge, hy-  
draulic, hydraulic-surge and air.  
16. Application - Indicates which units can be employed  
on a particular trailer.  
3. GVWR- Gross Vehicle Weight Rating (GVWR), is the  
maximum number of pounds the trailer can carry, in-  
cluding the fuel cell (empty).  
4. Frame Length - Measurement is from the ball hitch to  
the rear bumper (reflector).  
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DCA-125USJ (50 HZ)— GENERATOR DECALS  
The DCA-125USJ (50 HZ)generator is equipped with a number of safety decals (Figure 4). These decals are provided for  
operator safety and maintenance information. The illustration below and on the preceding page show the decals as they  
appear on the machine. Should any of these decals become unreadable, replacements can be obtained from your dealer.  
Figure 4. Generator Decals  
PAGE 18 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— GENERATOR DECALS  
Figure 4. Generator Decals (Cont.)  
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DCA-125USJ (50 HZ)— GENERAL INFORMATION  
DCA-125USJ (50 HZ) Series Familiarization  
Open Delta Excitation System  
Generator  
The DCA-125USJ (50 HZ)generator is equipped with the state  
of the art "Open-Delta" excitation system. The open delta  
system consist of an electrically independent winding wound  
among stationary windings of the AC output section.  
The MQ Power Model DCA-125USJ (50 HZ)is a 80 kW  
generator (Figure 5) that is designed as a high quality  
portable (requires a trailer for transport) power source for  
telecom sites, lighting facilities, power tools, submersible  
pumps and other industrial and construction machinery.  
There are four connections of the open delta A, B, C and D.  
During steady state loads, the power from the voltage regulator  
is supplied from the parallel connections of A to B, A to D,  
and C to D. These three phases of the voltage input to the  
voltage regulator are then rectified and are the excitation  
current for the exciter section.  
Engine Operating Panel  
The “Engine Operating Panel” is provided with the following:  
z
z
z
z
z
z
z
z
z
Tachometer  
WaterTemperature Gauge  
Oil Pressure Gauge  
Charging Ammeter Gauge  
Fuel Level Gauge  
Pre-heat Lamp  
Panel Light/Panel Light Switch  
Auto ON/OFF Engine Controller (MPEC)  
Fuel Leak Detected Alarm Lamp  
When a heavy load, such as a motor starting or a short  
circuit occurs, the automatic voltage regulator (AVR)  
switches the configuration of the open delta to the series  
connection of B to C.This has the effect of adding the voltages  
of each phase to provide higher excitation to the exciter  
section and thus better voltage response during the  
application of heavy loads.  
The connections of the AVR to the AC output windings are  
for sensing only. No power is required from these windings.  
Generator Control Panel  
The open-delta design provides virtually unlimited excitation  
current, offering maximum motor starting capabilities. The  
excitation does not have a "fixed ceiling" and responds  
according the demands of the required load.  
The “Generator Control Panelis provided with the following:  
z
z
z
z
z
z
z
Frequency Meter (Hz)  
AC Ammeter (Amps)  
AC Voltmeter (Volts)  
Engine  
Ammeter Change-Over Switch  
Voltmeter Change-Over Switch  
Voltage Regulator  
The DCA-125USJ (50 HZ)is powered by a 4 cycle, water  
cooled, direct injection, turbocharged JOHN DEERE Model  
6068TF275 Diesel Engine.This engine is designed to meet  
every performance requirement for the generator.Reference  
Table 1 for engine specifications.  
3-Pole, 300 amp Main Circuit Breaker  
Control Box  
The “Control Box”, located behind the Generator Control  
Panel, is provided with the following:  
In keeping with MQ Power's policy of constantly improving  
its products, the specifications quoted herein are subject to  
change without prior notice.  
z
z
z
z
z
z
z
Automatic Voltage Regulator  
CurrentTransformer  
Electric Governor System  
Over-Current Relay  
The electric governor system controls the RPMs of the  
engine. When the engine demand increases or decreases,  
the governor system regulates the frequency variation to  
.25%.  
Voltage Rectifer  
Starter Relay  
Engine Controller (Computer Controlled)  
Voltage Selector Switch  
Extension Cables  
OutputTerminal Panel  
When electric power is to be provided to various tools or  
loads at some distance from the generator, extension cords  
are normally used. Cables should be sized to allow for  
distance in length and amperage so that the voltage drop  
between the generator and point of use (load) is held to a  
minimum. Use the cable selection chart (Table 5) as a guide  
for selecting proper extension cable size.  
The “Output Terminal Panel” is provided with the following:  
z
z
z
z
z
z
z
Three 100/200V output receptacles (CS-6369), 50A  
Three auxilliary circuit breakers, 50A  
Two 100V output receptacles (GFCI), 20A  
Two GFCI circuit breakers, 20A  
Five output terminal lugs (3Ø power)  
Battery Charger (Optional)  
Water Heater (Optional)  
PAGE 20 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— MAJOR COMPONENTS  
Table 3. Generator Major Components  
ITEM NO.  
DESCRIPTION  
Muffler Assembly  
1
2
3
4
5
6
7
8
9
Engine Assembly  
Enclosure Assembly  
Generator Assembly  
Output Terminal Assembly  
Fuel Tank Assembly  
Battery Assembly  
Generator Control Panel Assembly  
Engine Operating Panel Assembly  
Figure 5. Major Components  
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NOTE PAGE  
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DCA-125USJ (50 HZ)— GENERATOR CONTROL PANEL  
Figure 6. Generator Control Panel  
Located behind the generator control panel is the Generator  
Control Box. This box contains some of the necessary  
electronic components required to make the generator  
function.  
The definitions below describe the controls and functions of  
the DCA-125USJ (50 HZ)Generator Control Panel (Figure  
6).  
1. Main Circuit Breaker – This three-pole, 300A main  
breaker is provided to protect the the U,V,andW Output  
Terminal Lugs from overload.  
The Control Box is equipped with the following major  
components:  
z
z
z
z
z
Over-Current Relay  
Voltage Rectifer (AVR)  
Starter Relay  
CurrentTransformer  
Voltage Selector Switch  
2. Frequency Meter – Indicates the output frequency in  
hertz (Hz). Normally 50 Hz.  
3. AC Ammeter – Indicates the amount of current the load  
is drawing from the generator per leg selected by the  
ammeter phase-selector switch.  
4. Ammeter Change-Over Switch – This switch allows  
the AC ammeter to indicate the current flowing to the  
load connected to any phase of the output terminals, or  
to be switched off. This switch does not effect the  
generator output in any fashion, it is for current reading  
only.  
Remember the overcurrent  
relay monitors the current  
flowing from the U,V, and W  
OutputTerminal Lugs to the  
load.  
NOTE  
In the event of a short circuit or over current condition, it will  
automatically trip the 60 amp main breaker.  
5. ACVoltmeter Indicates the output voltage present at  
the U,V, and W Output Terminal Lugs.  
To restore power to the Output Terminal Panel, press the  
reset button on the overcurrent relay and place the main  
circuit breaker in the closed position (ON).  
6. Voltmeter Change-Over Switch – This switch allows  
the AC voltmeter to indicate phase to phase voltage  
between any two phases of the output terminals or to  
be switched off.  
7. Voltage Regulator Control – Allows 15% manual  
1
adjustment of the generator’s output voltage.  
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 23  
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DCA-125USJ (50 HZ)— ENGINE OPERATING PANEL  
Figure 7. Engine Operating Panel  
PAGE 24 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— ENGINE OPERATING PANEL  
The definitions below describe the controls and functions of During cranking cycle , The MPEC will attempt to crank the  
the DCA-125USJ (50 HZ)Engine Operating Panel (Figure engine for 10 seconds before disengaging. If the engine does  
7).  
not engage (start) by the third attempt, the engine will be  
shutdown by the engine controller’s Over Crank Protection  
mode. If the engine engages at a speed (RPM's) that is not  
safe, the controller will shutdown the engine by initializing  
the Over Speed Protection mode.  
1. Panel Light – Normally used in dark areas or at night  
time.When activated, panel lights will illuminate.When  
the generator is not in use be sure to turn the panel  
light switch to the OFF position.  
2. Panel Light Switch – When activated will turn on control  
Also the engine controller will shut down the engine in the  
event of low oil pressure, high coolant temperature, low  
coolant level, and loss of magnetic pickup.These conditions  
can be observed by monitoring the LED status indicators on  
the front of the controller module.  
panel light.  
3. Oil Pressure Gauge – During normal operation this  
gauge be should read between 35 to 65 psi. When  
starting the generator the oil pressure may read a little  
higher, but after the engine warms up the oil pressure  
should return to the correct pressure range.  
A. MPEC Control Switch – This switch controls the  
running of the unit. If this switch is set to the  
OFF/RESET position, the unit will not run. When this  
switch is set to the MANUAL position, the generator  
will start immediately.  
4. WaterTemperature Gauge – During normal operation  
this gauge be should read between 180° and 221°F.  
5. Charging Ammeter Gauge – Indicates the current  
being supplied by the engine’s alternator which provides  
current for generator’s control circuits and battery  
charging system.  
If the generator is to be connected to a building's AC  
power source via a transfer switch (isolation), place  
the switch in the AUTO position. In this position the  
generator will monitor the AC line output from the  
building's power source.  
6. Fuel Gauge - Indicates amount of diesel fuel available.  
7. Tachometer Indicates engine speed in RPM’s for 50  
Hz operation. This meter should indicate 1500 RPM’s  
when the rated load is applied. In addition a built in hour  
meter will record the number of operational hours that  
the generator has been in use.  
B. Low Oil Pressure – Indicates the engine pressure has  
fallen below 15 psi. The oil pressure is detected using  
variable resistive values from the oil pressure sending  
unit. This is considered a major fault.  
8. Pre-Heat Lamp – As the engine cranks, this lamp will  
illuminate to indicate automatic preheating of the engine.  
When the lamp turns off, the engine has been preheated  
and will start automatically.  
C. High Coolant Temperature – Indicates the engine  
temperature has exceeded 239°F. The engine  
temperature is detected using variable resistive values  
from the temperature sending unit. This is considered  
a major fault.  
9. Fuel Leak Detected Alarm Lamp – This lamp will  
illuminate when a leak in the fuel tank containment  
enclosure is detected.  
D. Overcrank Shutdown – Indicates the unit has  
attempted to start a pre- programmed number of times,  
and has failed to start. The number of cycles and  
duration are programmable. It is pre-set at 3 cycles  
with a 10 second duration. This is considered a major  
fault.  
10. Auto On/Off Engine Controller (MPEC) –  
This controller has a vertical  
row of status LED's (inset), that  
when lit, indicate that an engine  
malfunction (fault) has been  
detected. When a fault has  
been detected the engine  
controller will evaluate the fault  
and all major faults will  
shutdown the generator.  
E. Overspeed Shutdown – Indicates the engine is running  
at an unsafe speed. This is considered a major fault.  
F. Engine Running – Indicates that engine is running at  
a safe operating speed.  
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DCA-125USJ (50 HZ)— OUTPUT TERMINAL PANEL FAMILIARIZATION  
OutputTerminal Panel  
Output Terminal Familiarization  
The OutputTerminal Panel (Figure 8) shown below is located  
on the right-hand side (left from control panel) of the generator.  
Lift up on the cover to gain access to receptacles and terminal  
lugs.  
The “OutputTerminal Panel ” (Figure 8) is provided with the  
following:  
z
z
z
z
z
Three (3) 100/200V output receptacles @ 50 amp  
Three (3) Circuit Breakers @ 50 amps  
Two (2) 100V GFCI receptacles @ 20 amp  
Two (2) GFCI Circuit Breakers @ 20 amps  
Five (5) Output Terminal Lugs ( U, V, W, O, Ground)  
Terminal legsOand “Groundare  
NOTE  
considered bonded grounds.  
Figure 8. Output Terminal Panel  
PAGE 26 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— OUTPUT TERMINAL PANEL FAMILIARIZATION  
100VAC GFCI Receptacles  
Each auxilliary receptacle is protected by a 50 amp circuit  
breaker.These breakers are located directly above the GFCI  
receptacles. Remember the load output (current) on all three  
receptacles is dependent on the load requirements of the  
OutputTerminal Lugs.  
There are two 100VAC, 20 amp GFCI (Duplex Nema 5-20R)  
recepacles provided on the output terminal panel. These  
receptacles can be accessed in any voltage selector switch  
position. Each receptacle is protected by a 20 amp circuit  
breaker.These breakers are located directly above the GFCI Turn the voltage regulator control knob (Figure 11) on the  
receptacles. Remember the load output (current) of both control panel to obtain the desired voltage.Turning the knob  
GFCI receptacles is dependent on the load requirements of clockwise will increase the voltage, turning the knob counter-  
the UVWO terminals.  
clockwise will decrease the voltage.  
Pressing the reset button resets the GFCI receptacle after  
being tripped. Pressing the "Test Button" (See Figure 9) in  
the center of the receptacle will check the GFCI function.  
Both receptacles should be tested at least once a month.  
Figure 11. Voltage Regulator Control Knob  
Removing the Plastic Face Plate (HardWire Hookup Panel)  
The Output Terminal Lugs are protected by a plastic face  
plate cover (Figure 12). Un-screw the securing bolts and lift  
the plastic terminal cover to gain access to the terminal  
enclosure.  
After the load wires have been securely attached to the  
terminal lugs, reinstall the plastic face plate.  
Figure 9. G.F.C.I. Receptacle  
Twist Lock DualVoltage 100/200VAC Receptacles  
There are three 100/200V, 50 amp auxilliary twist-lock  
(CS-6369) recepacles (Figure 10) provided on the output  
terminal panel.These receptacles can only be accessed  
when the voltage selector switch is placed in the single-  
phase 240/120 position.  
Figure 12. Plastic Face Plate (Output Terminal Lugs)  
Figure 10. 100/200V Twist-Lock  
Auxiliary Receptacles  
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DCA-125USJ (50 HZ)— OUTPUT TERMINAL PANEL FAMILIARIZATION  
Connecting Loads  
Blower Fan  
Loads can be connected to the generator by the OuputTerminal  
Lugs or the convienience receptacles. (See Figure 13). Make  
sure to read the operation manual before attempting to connect  
a load to the generator.  
This unit has an intake fan located at the rear of the machine  
to draw outside air into the cabinet to cool the engine. The  
fan has a 10 amp AC fuse located beneath the Voltage  
Selector Switch (Figure 15).  
To protect the output terminals from overload, a  
3-pole, 300A main circuit breaker is provided. Make sure to  
switch ALL circuit breakers to the OFF position prior to  
starting the engine.  
Figure 15. Blower Fan Fuse  
DANGER:  
This fuse has current running through it any  
time the engine is operating. THIS FUSE  
IS NOT connected to the main circuit  
breaker OF the generator. Attempting to  
replace the fuse with the engine  
and/or generator operating could  
result in electrocution and severe  
bodily harm. ALWAYS turn the  
unit completely off before  
attempting to replace or handle  
THIS fuse  
Figure 13. Connecting Loads  
Over Current Relay  
An over current relay (Figure 14) is connected to the main  
circuit breaker. In the event of an overload, both the circuit  
breaker and the over current relay may trip. If the circuit  
breaker can not be reset, the reset button on the over cur-  
rent relay must be pressed. The over current relay is lo-  
cated in the control box.  
Figure 14. Over Current Relay  
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DCA-125USJ (50 HZ)— LOAD APPLICATION  
Single Phase Load  
Three Phase Load  
Always be sure to check the nameplate on the generator When calculating the power requirements for 3-phase power  
and equipment to insure the wattage, amperage, frequency  
,
use the following equation:  
and voltage requirements are satisfactorily supplied by the  
generator for operating the equipment.  
Generally, the wattage listed on the nameplate of the  
equipment is its rated output. Equipment may require 130—  
150% more wattage than the rating on the nameplate, as  
the wattage is influenced by the efficiency, power factor and  
starting system of the equipment.  
If 3Ø load (kVA) is not given on  
the equipment nameplate,  
approximate 3Ø load output  
maybedeterminedbymultiplying  
voltage by amperage by 1.732.  
NOTE  
If wattage is not given on the  
equipment's  
name  
plate,  
approximate wattage may be  
determined by multiplying  
nameplate voltage by the  
nameplate amperage.  
Motors and motor-driven  
equipment draw much greater  
current for starting than during  
operation.  
NOTE  
WATTS = VOLTAGE x AMPERAGE  
The power factor of this generator is 0.8. See Table 4 below  
when connecting loads.  
An inadequate size connecting cable which cannot carry the  
required load can cause a voltage drop which can burn out  
the appliance or tool and overheat the cable. See Table 5.  
Table 4. Power Factor By Load  
Type Of Load  
Power Factor  
z
z
z
When connecting a resistance load such as an  
incandescent lamp or electric heater, a capacity of up to  
the generating set’s rated output (kW) can be used.  
Single-phase induction motors  
0.4 - 0.75  
Electric heaters, incandescent  
lamps  
1.0  
0.4 - 0.9  
1.0  
When connecting a fluorescent or mercury lamp, a  
capacity of up to the generating set’s rated output (kW)  
multiplied by 0.6 can be used.  
Fluorescent lamps, mercury lamps  
Electronic devices, communication  
equipment  
When connecting an electric drill or other power tools,  
pay close attention to the required starting current  
capacity.  
Common power tools  
0.8  
Table 6. Cable Selection (60 Hz, Single Phase Operation)  
Load In Watts Maximum Allowable Cable Length  
When connecting ordinary power tools, a capacity of up to  
the generating set’s rated output (kW) multiplied by 0.8 can  
be used.  
Current in  
Amperes  
At 100  
Volts  
At 200  
Volts  
#10 Wire  
#12 Wire  
#14 Wire  
#16 Wire  
2.5  
5
300  
600  
600  
1000 ft.  
500 ft.  
350 ft.  
250 ft.  
150 ft.  
125 ft.  
600 ft.  
300 ft.  
200 ft.  
150 ft.  
100 ft.  
75 ft.  
375 ft.  
200 ft.  
125 ft.  
100 ft.  
65 ft.  
250 ft.  
125 ft.  
100 ft.  
1200  
1800  
2400  
3600  
4800  
DANGER:  
7.5  
10  
15  
20  
900  
Before connecting this generator to any  
building’s electrical system, a licensed  
electrician must install an isolation  
(transfer) switch. Serious damage to the  
building’s electrical system may occur  
1200  
1800  
2400  
50 ft.  
CAUTION: Equipment damage can result from low voltage.  
without this transfer switch.  
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DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 29  
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DCA-125USJ (50 HZ)— GENERATOR OUTPUTS  
Voltage Selector Switch  
Generator OutputVoltages  
The voltage selector switch (Figure 16) is located above A wide range of voltages are available to supply voltage for  
the output terminal panel’s Hard Wire Hook-up Panel. It many different applications. Voltages are selected by using  
has been provided for ease of voltage selection.  
the voltage selector switch (Figure 15). To obtain some of  
the voltages as listed in Table 6 (see below) will require a  
fine adjustment using the voltage regulator (VR) control  
knob located on the control panel.  
Table 6. Voltages Available  
Three Phase  
(Switchable)  
200V  
115V  
220V  
127V  
240V  
139V  
416V  
240V  
440V  
254V  
Single Phase  
(Switchable)  
Figure 16. Voltage Selector Switch  
Generator Amperage  
Voltage Selector Switch Locking Button  
Table 7 describes the generator’s current output capability  
for both 1Ø-phase and 3Ø phase applications.  
The voltage selector switch has a locking button to protect  
the generator and load from being switched while the engine  
is running. To lock the voltage selector switch, press and  
hold the red button located at the bottom of the switch.  
Table 7. Generator Ampere Ratings  
DCA-125USJ  
Single Phase  
Three Phase*  
kW  
kVA  
N/A  
100  
100V  
288A x 2  
N/A  
200V  
220V  
263A  
288A  
440V  
N/A  
58  
N/A  
CAUTION:  
80  
288A  
131A  
NEVER change the position of the voltage  
selector switch while the engine is running.  
ALWAYS place circuit breaker in the open  
position before selecting voltage.  
* Power Factor = 0.8  
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DCA-125USJ (50 HZ)— GAUGE READING  
How to Read the OutputTerminal Gauges.  
Reading Amperage  
The gauges and selector switches on the control panel To determine the amperage at a terminal lug, set the  
DO NOT effect the generator output. They are provided to AC Ammeter Change-Over Switch to the appropriate  
help observe how much power is being supplied at the setting (Figure 20) to activate the AC Ammeter Gauge  
Output terminals lugs.  
(Figure 21) and read the available amperage at the terminal  
lug.  
Before taking a reading off either gauge, set the Voltage  
Selector Switch (Figure 17) to the position which produces For example, to measure the amperage at the U  
the required voltage (For example, for 3Ø 200V,  
choose the center 3Ø 240/  
139V position on the volt-  
terminal lug, set the AC Ammeter Change-Over Switch to  
U and read the AC Ammeter Gauge.  
age selector switch.)  
Figure 17. Voltage  
Selector Switch 240/  
139VThree Phase  
Position  
Figure 21. AC Ammeter  
(Amp reading on U lug)  
Figure 20. AC Ammeter  
Change-Over Switch  
For 3Ø 200V/1Ø,115V, place  
NOTE  
the Voltage Selector Switch  
in the 3 Phase 240/139  
position.  
The ammeter gauge will only  
show a reading when the  
Output Terminal Lugs are  
connected to a load and in use.  
NOTE  
Reading Voltage  
To determine the voltage between two terminal lugs, set the  
AC Voltmeter Change-Over Switch to the appropriate  
setting (Figure 18) to activate the AC Voltmeter Gauge  
(Figure 19) and read the available voltage between the two  
lugs.  
For example, to measure the voltage between the W and U  
terminal lugs, set the AC Voltmeter Change-Over Switch  
to W-U and read the ACVoltmeter Gauge.  
Figure 18. AC Voltmeter Figure 19. AC Voltmeter Gauge  
Change-Over Switch  
(Volt reading on W-U Lug)  
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DCA-125USJ (50 HZ)— OUTPUT TERMINAL PANEL CONNECTIONS  
UVWO Terminal Output Voltages  
3Ø 200V/1Ø115V Output Terminal Lug Voltages  
Various output voltages can be obtained using the Output  
Terminal Lugs.. The voltages at the terminals are depen-  
dent on the position of the Voltage Selector Switch and the  
adjustment of the Voltage Regulator Control Knob.  
1. Place the voltage selector switch in the 3Ø 240/139  
position as shown in Figure 25.  
Use this position for  
3Ø-200 or 1Ø115V.  
Remember the voltage selector switch determines the range  
of the output voltage. The voltage regulator (VR) allows the  
user to increase or decrease the selected voltage.  
3Ø 220/127 Output Terminal Lug Voltages  
Figure 25. Voltage  
Selector Switch 240/139V  
Three-Phase Position  
1. Place the voltage selector switch in the 3Ø 240/139  
position as shown in Figure 22.  
2. Connect the load wires to the OutputTerminal Lugs as  
shown in Figure 26.  
Figure 22. Voltage Selector Switch 240/139V  
Three-Phase Position  
2. Connect the load wires to the OutputTerminal Lugs as  
shown in Figure 22.  
Figure 26. Output Terminal Lugs  
3Ø-200V/115V Connections  
3. Turn the voltage regulator knob (Figure 24) clockwise to  
increase voltage output, turn counterclockwise to  
decrease voltage output.  
Figure 23. Output Terminal Lugs  
3Ø 220/127VThree Phase Connections  
3. Turn the voltage regulator knob (Figure 23) clockwise to  
increase voltage output, turn counterclockwise to  
decrease voltage output.  
To achieve a 3Ø 200V output  
the voltage selector switch  
must be in the 3Ø-240/139  
position and the voltage  
regulator must be adjusted to  
200V.  
NOTE  
Figure 24. Voltage Regulator Knob (139V/240V)  
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DCA-125USJ (50 HZ)— OUTPUT TERMINAL PANEL CONNECTIONS  
3Ø 440/254 OutputTerminal Lug Voltages  
1Ø 200V/100V Output Terminal Lug Voltages  
1. Place the voltage selector switch in the 3Ø 480/277  
position as shown in Figure 27.  
1. Place the voltage selector switch in the 1Ø 240/120  
position as shown in Figure 29.  
Figure 27. Voltage Selector Switch 480/277V  
Three-Phase Position  
Figure 29. Voltage Selector Switch 240/120V  
Single-Phase Position  
2. Connect the load wires to the OutputTerminal Lugs as  
2. Connect the load wires to the OutputTerminal Lugs as  
shown in Figure 28.  
shown in Figure 30.  
Figure 28. UVWO Terminal Lugs  
400/230V Three Phase Connections  
Figure 30. UVWO Terminal Lugs  
1Ø-200V/100V Connections  
3. Turn the voltage regulator knob (Figure 24) clockwise to  
increase voltage output, turn counterclockwise to  
decrease voltage output.  
3. Turn the voltage regulator knob (Figure 25) clockwise to  
increase voltage output, turn counterclockwise to  
decrease voltage output.  
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DCA-125USJ (50 HZ)— PRE-SETUP  
Fuel Check  
Circuit Breakers  
To protect the generator from an overload, a 3-pole, 300 amp,  
main circuit breaker is provided to protect the U,V, and W  
OutputTerminals from overload.In addition two single-pole,  
20 amp GFCI circuit breakers are provided to protect the  
GFCI receptacles from overload. Three 50 amp load circuit  
breakers have also been provided to protect the auxiliary  
receptacles from overload. Make sure to switch ALL circuit  
breakers to the OFF position prior to starting the engine.  
DANGER:  
Fuel spillage on a hot! engine can cause a  
fire or explosion. If fuel spillage occurs,  
wipe up the spilled fuel completely to  
prevent fire hazards. NEVER! smoke  
around or near the generator.  
Lubrication Oil  
Fill the engine crankcase with lubricating oil through the filler  
hole, but DO NOT overfill. Make sure the generator is level.  
and verify that the oil level is maintained between the two  
notches (Figure 31) on the dipstick. See Table 8 for proper  
selection of engine oil.  
Refilling the Fuel System  
WARNING:  
ONLY properly trained personel who have  
read and understand this section should re-  
fill the fuel tank system.  
Figure 31. Engine Oil Dipstick  
The generator unit has an internal fuel tank located at the  
bottom of the cabinet (Figure 32). ALWAYS fill the fuel tank  
with clean and fresh #2 diesel fuel. DO NOT fill the fuel  
tanks beyond their capacities.  
When checking the engine oil, be sure to check if the oil is  
clean. If the oil is not clean, drain the oil by removing the oil  
drain plug, and refill with the specified amount of oil as outlined  
in the John Deere Engine Owner's Manual. Oil should be  
warm before draining.  
Pay attention to the fuel tank capacity when replenishing  
fuel.The fuel tank cap must be closed tightly after filling.  
Handle fuel in a safety container. If the container does not  
have a spout, use a funnel. Wipe up any spilled fuel  
immediately.  
Other types of motor oils may be substituted if they meet  
the following requirements:  
z
z
z
z
API Service Classification CC/SC  
API Service Classification CC/SD  
API Service Classification CC/SE  
API Service Classification CC/SF  
Figure 32. Internal Fuel Tank System  
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DCA-125USJ (50 HZ)— PRE-SETUP  
Refueling Procedure:  
3. Open cabinet doors on the “right side” of the generator  
(from generator control panel position). Remove fuel cap  
and fill tank (Figure 34).  
DANGER:  
Diesel fuel and its vapors are dangerous  
to your health and the surrounding  
environment. Avoid skin  
contact and/or inhaling  
fumes.  
1. Level Tanks – make sure fuel cells are level with the  
ground. Failure to do so will cause fuel to spill from the  
tank before reaching full capacity (Figure 33).  
WARNING:  
ALWAYS! place trailer on firm level ground  
before refueling.  
Figure 34. Fueling the Generator  
3. NEVER overfill fuel tank – It is important to read the  
fuel gauge when filling trailer fuel tank. DO NOT wait for  
fuel to rise in filler neck (Figure 35).  
Figure 33. Only Fill on Level Ground  
ONLY! use #2 diesel fuel when  
refueling.  
NOTE  
Figure 35. Full Fuel Tank  
WARNING:  
DO NOT OVER-FILL fuel system. Leave  
room for fuel expansion . Fuel expands when  
heated (Figure 36).  
Figure 36. Fuel Expansion  
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DCA-125USJ (50 HZ)— PRE-SETUP  
Coolant (John Deere Antifreeze/Summer Coolant/Water)  
John Deere recommends John Deere Antifreeze/Summer  
Coolant for use in thier engines, which can be purchased in  
concentrate (and mixed with 50% demineralized water) or  
pre-diluted. See the John Deere Engine Owner's Manual  
for further details.  
NOTE  
When the antifreeze is mixed with  
water, the antifreeze mixing ratio  
must be less than 50%.  
Cleaning the Radiator  
The engine may overheat if the radiator fins become  
overloaded with dust or debris. Periodically clean the radiator  
fins with compressed air. Cleaning inside the machine is  
dangerous, so clean only with the engine turned off and the  
negative battery terminal disconnected.  
CAUTION:  
Air Cleaner  
Ifaddingcoolant/antifreeze mix to the radiator, DO NOT remove  
the radiator cap until the unit has completely cooled. The  
possibility of hot! coolant exists which can cause severe  
burns.  
Periodic cleaning/replacement is necessary. Inspect it in  
accordance with the John Deere Engine Owner's Manual.  
Fan BeltTension  
A slack fan belt may contribute to overheating, or to  
insufficient charging of the battery. Inspect the fan belt for  
damage and wear and adjust it in accordance with the John  
Deere Engine Owner's Manual.  
Day-to-day addition of coolant is done from the recovery  
tank. When adding coolant to the radiator, DO NOT remove  
the radiator cap until the unit has completely cooled. See  
Table 9 for engine, radiator, and recovery tank coolant  
capacities. Make sure the coolant level in the recovery tank  
is always between the "H" and the "L" markings.  
The fan belt tension is proper if the fan belt bends 10 to 15  
mm (Figure 37) when depressed with the thumb as shown  
below.  
Table 9. Coolant Capacity  
Engine and Radiator  
Reserve Tank  
4.4 Gal. (16.8 liters)  
2 Quarts (1.9 liters)  
Operation FreezingWeather  
Figure 37. Fan BeltTension  
When operating in freezing weather, be certain the proper  
amount of antifreeze (Table 10) has been added.  
Table 10. Anti-Freeze  
Operating Temperatures  
CAUTION  
:
NEVER! place hands  
near the belts or fan while  
the generator set is  
running.  
Freezing Point  
Vol %  
Anti-Freeze  
°C  
°F  
50  
-37  
-34  
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DCA-125USJ (50 HZ)— PRE-SETUP  
Battery  
When connecting battery do the following:  
This unit is of negative ground DO NOT connect in reverse. 1. NEVER connect the battery cables to the battery  
Always maintain battery fluid level between the specified  
marks. Battery life will be shortened, if the fluid level are not  
properly maintained. Add only distilled water when  
replenishment is necessary.  
terminals when the MPEC Control Switch is in either  
the MANUAL position. ALWAYS make sure that the  
MPEC Control Switch is in the OFF/RESET position  
when connecting the battery.  
DO NOT over fill. Check to see whether the battery cables 2. Place a small amount of battery terminal treatment  
are loose. Poor contact may result in poor starting or  
malfunctions. Always keep the terminals firmly tightened.  
Coating the terminals with an approved battery terminal  
treatment compound. Replace battery with only  
recommended type battery. The battery type used in this  
generator is BCI Group 27.  
compound around both battery terminals.This will ensure  
a good connection and will help prevent corrosion around  
the battery terminals.  
If the battery cable is connected  
incorrectly, electrical damage to  
the generator will occur. Pay close  
NOTE  
The battery is sufficiently charged if the specific gravity of  
the battery fluid is 1.28 (at 68° F). If the specific gravity  
should fall to 1.245 or lower, it indicates that the battery is  
dead and needs to be recharged or replaced.  
attention to the polarity of the  
battery when connecting the  
battery.  
Before charging the battery with an external electric source,  
be sure to disconnect the battery cables.  
CAUTION  
:
Inadequate battery connections may cause  
poor starting of the generator, and create  
other malfunctions.  
Battery Cable Installation  
ALWAYS be sure the battery cables (Figure 38) are properly  
connected to the battery terminals as shown below. The  
RED cable is connected to the positive terminal of the battery,  
and the BLACK cable is connected to the negative terminal  
of the battery.  
Alternator  
The polarity of the alternator is negative grounding type. When  
an inverted circuit connection takes place, the circuit will be  
in short circuit instantaneously resulting the alternator failure.  
CAUTION  
:
DO NOT put water directly on the alternator. Entry of water  
into the alternator can cause corrision and damage the  
alternator.  
ALWAYS disconnect the negative terminal  
FIRST and reconnect negative terminal  
LAST.  
Wiring  
Inspect the entire generator for bad or worn electrical wiring  
or connections. If any wiring or connections are exposed  
(insulation missing) replace wiring immediately.  
Piping and Hose Connection  
Inspect all piping, oil hose, and fuel hose connections for  
wear and tightness.Tighten all hose clamps and check hoses  
for leaks.  
If any hose (fuel or oil) lines are defective replace them  
immediately.  
Figure 38. Battery Connections  
1
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DCA-125USJ (50 HZ)— GENERATOR START-UP PROCEDURE (MANUAL)  
4. Close all engine enclosure doors (Figure 40).  
WARNING:  
The engine's exhaust contains harmful  
emissions. ALWAYS have adequate  
ventilation when operating. Direct exhaust  
away from nearby personnel.  
Before Starting  
CAUTION:  
Figure 40. Engine Enclosure Doors  
NEVER! manually start the engine with the  
main, GFCI or auxiliary circuit breakers in  
the ON (closed) position.  
5. Place the voltage selector switch  
in the desired voltage position  
(Figure 41).  
1. Place the main, G.F.C.I. and aux. circuit breakers (Figure 39)  
in the OFF position prior to starting the engine.  
Figure 41. Voltage Selector  
Switch  
Figure 39. Main, Aux. and GFCI  
Circuit Breakers (OFF)  
2. Connect the load to the receptacles or the Output  
Terminal Lugs as shown in Figure 13. These load  
connection points can be found on the output terminal  
panel and the output terminal panel’s hard wire hookup  
panel.  
3. The output terminal lugs are protected by a plastic cover.  
Remove this cover to gain access to the terminals.  
Tighten terminal nuts securely to prevent load wires from  
slipping out.  
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DCA-125USJ (50 HZ)— GENERATOR START-UP PROCEDURE (MANUAL)  
Starting (Manual)  
9. The generator's frequency meter (Figure 45) should be  
displaying the 60 cycle output frequency in HERTZ.  
8. Place the MPEC Control Switch in the MANUAL  
position to start the engine (Figure 42).  
Figure 45. Frequency Meter (Hz)  
Figure 42. MPEC Control Switch  
(Manual Position)  
10. The generator's AC-voltmeter (Figure 46) will display the  
generator’s output in VOLTS. If the voltage is not within  
the specified tolerance, use the voltage adjustment  
control knob (Figure 47) to increase or decrease the  
desired voltage.  
In cold weather conditions, placing the MPEC Control  
Switch in the MANUAL position will preheat and start  
the engine AUTOMATICALLY. The Preheat Lamp  
(Figure 43) will turn off when the engine has started.  
7. Once the engine starts, let the engine run for 1-2 minutes.  
Listen for any abnormal noises.  
Figure 46. Voltmeter  
Figure 43. Pre-Heat Lamp  
8. Verify that the Engine Running  
status LED on the MPEC unit  
(Figure 44) is ON (lit) after the  
engine has been started.  
Figure 47. Voltage Adjust Control Knob  
11. The ammeter (Figure 48) will  
indicate zero amps with no load  
applied. When a load is applied,  
the ammeter will indicate the  
amount of current that the load is  
drawing from the generator.  
Figure 44. Engine Running  
LED (ON)  
Figure 48. Ammeter (No Load)  
1
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DCA-125USJ (50 HZ)— GENERATOR START-UP PROCEDURE (MANUAL)  
15. Place the main, GFCI, and aux. circuit breakers in the  
ON position (Figure 52).  
12. The engine oil pressure gauge  
(Figure 49) will indicate the oil  
pressure (kg/ cm2) of the engine.  
Under normal operating conditions  
the oil pressure is approximately  
35~65 PSI.  
Figure 49. Oil Pressure Gauge  
13. The coolant temperature gauge (Figure 50) will indicate  
the coolant temperature. Under normal operating  
conditions the coolant temperature should be between  
165 and 215 degrees Fahrenheit (Green Zone).  
Figure 52. Main, Aux. and GFCI  
Circuit Breakers (ON)  
16. Observe the generator's ammeter (Figure 53) and verify  
it reads the anticipated amount of current with respect  
to the load. The ammeter will only display a current  
reading if a load is in use.  
Figure 50. Coolant Temperature Gauge  
14. The tachometer gauge (Figure 51) will indicate the  
speed of the engine when the generator is operating.  
Under normal operating conditions this speed is  
approximately 1500 RPM’s.  
Figure 53. Ammeter (Load)  
17. The generator will run until manually stopped or an  
abnormal condition occurs.  
Figure 51. Engine Tachometer Gauge  
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DCA-125USJ (50 HZ)— GENERATOR START-UP PROCEDURE (AUTO MODE)  
Starting (Auto Mode)  
DANGER:  
Before connecting this  
generator to any  
building’s electrical  
2. Place the MPEC Control Switch (Figure 54) in the  
AUTO position .  
system, a licensed  
electrician must install an isolation (transfer) switch.  
Serious damage to the building’s electrical system may occur  
without this transfer switch.  
Figure 54. MPEC Control Switch (AUTO)  
CAUTION:  
3. Continue to follow the steps outlined in the Manual Start-  
up procedure (start at step 9).  
When connecting the generator to a  
isolation (transfer) switch, ALWAYS have  
power applied to the generator's internal  
battery charger. This will ensure that the  
engine will not fail due to a dead battery.  
When the generator is set in the  
AUTO mode, the generator will  
automically start in the event  
of comercial power falling below  
a prescribed level by means of  
a contact closure that is  
generated automatically by a  
transfer switch.  
NOTE  
WARNING:  
When running the generator in the AUTO  
mode, remember the generator can start  
up at any time without warning. NEVER  
attempt to perform any maintenance when  
the generator is in the auto mode.  
1. Perform steps 1 through 5 in the Before Starting section  
as outlined in the Manual Starting Procedure.  
1
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DCA-125USJ (50 HZ)— GENERATOR SHUT-DOWN PROCEDURE  
Emergency Shutdown Procedure  
CAUTION  
:
1. To shut-down the engine in the event of an emergency,  
switch the MAIN, GFCI and LOAD (Figure 39) circuit  
breakers to OFF position.  
NEVER stop the engine suddenly except  
in an emergency. DO NOT use the  
emergency stop switch a as method of  
shutting down the generator.This switch is  
ONLY to be used in the event of an  
emergency.  
2. Place the MPEC Control Switch switch (Figure 55) to  
the OFF/RESET position.  
Shutdown Procedure  
To shutdown the generator use the following procedure:  
1. Place both the MAIN, GFCI and LOAD circuit breakers  
as shown in Figure 39 to the OFF position.  
3. Let the engine cool by running it for 3-5 minutes with no  
load applied.  
4. Place the MPEC Control Switch (Figure 55) to the  
OFF/RESET position.  
Figure 55. MPEC Control Switch (Off/Reset)  
5. Verify that the all status LED on the MPEC display  
are OFF (not lit).  
6. Remove all loads from the generator.  
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DCA-125USJ (50 HZ)— MAINTENANCE  
10 Hrs  
DAILY  
250 Hrs  
500 Hrs  
1000 Hrs  
TABLE 11. INSPECTION/MAINTENANCE  
Check Engine Fluid Levels  
Check Air Cleaner  
X
X
X
X
X
X
Check Battery Acid Level  
Check Fan Belt Condition  
Check for Leaks  
Check for Loosening of Parts  
1
Replace Engine Oil and Filter *  
X
X
Clean Air Filter  
ENGINE  
Check Fuel Filter/Water Seperator Bowl  
Clean Unit, Inside and Outside  
Change Fuel Filter  
X
X
X
X
Clean Radiator and Check Coolant Protection Level*2  
3
Replace Air Filter Element *  
X
4
Check all Hoses and Clamps *  
X
X
Clean Inside of Fuel Tank  
Measure Insulation Resistance Over 3M ohms  
Check Rotor Rear Support Bearing  
X
GENERATOR  
X
*1 Replace engine oil anf filter at 100 hours, first time only.  
*2 Add "Supplemental Coolant Addatives (SCA'S)" to recharge the engine coolant.  
*3 Replace primary air filter element when restriction indicator shows a vaccum of 625 mm (25 in. H20).  
*4 If blowby hose needs to be replaced, ensure that the slope of the bloby hose is at least a 1/2 inch per foot, with  
no sags or dips that could collect moisture and/or oil.  
General Inspection  
Service Daily  
Prior to each use, the generator should be cleaned and inspected  
for deficiencies. Check for loose, missing or damaged nuts, bolts  
or other fasteners. Also check for fuel, oil, and coolant leaks.  
If the engine is operating in very dusty or dry grass conditions, a  
clogged air cleaner will result.This can lead to a loss of power,  
excessive carbon buildup in the combustion chamber and high  
fuel consumption. Change air cleaner more frequently if these  
conditions exists.  
Engine Side (Refer to the Engine Instruction Manual). Use  
Table 11 as a general maintenance guideline  
Fuel Addition  
Air Cleaner  
Add diesel fuel (the grade may vary according to season and  
locations).  
Every 250 hours: Remove air cleaner element and clean the  
heavy duty paper element with light spray of compressed  
air. Replace the air cleaner as needed.  
RemovingWater from the FuelTank  
After prolonged use, water and other impurities accumulate in  
the bottom of the tank. Occasionally inspect the fuel tank for  
water contamination and drain the contents if required.  
Air Cleaner with Dust Indicator  
This indicator is attached to the air cleaner.When the air cleaner  
element is clogged, air intake restriction becomes greater and  
the dust indicator signal shows RED meaning the element needs  
changing or service. After changing the air element, press the  
dust indicator button to reset the indicator.  
During cold weather, the more empty volume inside the tank,  
the easier it is for water to condense.This can be reduced by  
1
keeping the tank full with diesel fuel.  
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 43  
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DCA-125USJ (50 HZ)— MAINTENANCE  
Air Removal  
Flushing Out Radiator and Replacing Coolant  
If air enters the fuel injection system of a diesel engine,  
starting becomes impossible. After running out of fuel, or  
after disassembling the fuel system, bleed the system  
according to the following procedure. See the John Deere  
Engine Manual for details.  
z
Open both cocks located at the crankcase side and at  
the lower part of the radiator and drain coolant.Open the  
radiator cap while draining. Remove the overflow tank  
and drain.  
z
z
Check hoses for softening and kinks. Check clamps for  
signs of leakage.  
Check Oil Level  
Flush the radiator by running clean tap water through  
radiator until signs of rust and dirt are removed.DO NOT  
clean radiator core with any objects, such as a  
screwdriver.  
Check the crankcase oil level prior to each use, or when the  
fuel tank is filled. Insufficient oil may cause severe damage  
to the engine. Make sure the generator is level.The oil level  
must be between the two notches on the dipstick as shown  
in Figure 33.  
z
z
Tighten both cocks and replace the overflow tank.  
Replace with coolant as recommended by the engine  
manufaturer.  
Replacing Oil Filter  
 
 
 
 
Remove the old oil filter.  
z
Close radiator cap tightly.  
Apply a film of oil to the gasket on the new oil filter.  
Install the new oil filter.  
CAUTION:  
Allow engine to cool when flushing out  
radiator.Flushing the radiator while hot could  
cause serious burns  
After the oil cartridge has been replaced, the engine oil  
will drop slightly. Run the engine for a while and check  
for leaks before adding more oil if needed. Clean  
excessive oil from engine.  
from water or steam.  
Replacing Fuel Filter  
 
Replace the fuel filter cartridge with new one every 500  
hours or so.  
Generator Storage  
 
Loosen the drain plug at the lower top of the fuel filter.  
Drain the fuel in the fuel body together with the mixed  
water. DO NOT spill the fuel during disassembly.  
For longe term storage of the generator the following is  
recommended:  
 
Vent any air.  
z
Fill the fuel tank completely. Treat with a fuel stabilizer  
if necessary.  
z
Completely drain the oil from the crankcase and refill if  
necessary with fresh oil.  
z
z
z
z
z
Clean the entire generator, internal and external.  
Cover the generating set and store in a clean, dry place.  
Disconnect the battery.  
Make sure engine coolant is at proper level.  
If generator is mounted on a trailer, jack trailer up and  
place on blocks so tires do not touch the ground or block  
and completely remove the tires.  
PAGE 44 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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NOTE PAGE  
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DCA-125USJ (50 HZ)TRAILER BRAKES MAINTENANCE  
Brakes  
Hydraulic Surge Brakes  
Trailer brakes should be inspected the first 200 miles of Hydraulic surge brakes (Figure 56) should not require any  
operation. This will allow the brake shoes and drums to seat special attention with the exception of routine maintenance  
properly. After the first 200 mile interval, inspect the brakes such as shoe and lining replacement. Brake lines should be  
every 3,000 miles. If driving over rough terrain, inspect the periodically checked for cracks, kinks, or blockage.  
brakes more frequently.  
Figure 56 displays the major hydraulic surge brake  
components that will require inspection and maintenance.  
Please inspect these components as required using steps 1  
through 8 as listed below:  
Brake Adjustment  
1. Place the trailer on jack stands. Make sure the jack  
stands are placed on secure level ground.  
2. Check the wheel and drum for free rotation.  
3. Remove the adjusting hole cover from the adjusting slot  
at the bottom brake backing plate.  
4. With a screwdriver or standard adjusting tool, rotate the  
star wheel of the adjuster assembly to expand the brake  
shoes.  
Figure 56. Hydraulic Brake Components  
Actuator  
Hydraulic surge braking requires the installation of an actuator  
at the tongue of the trailer. Remember the surge or push of  
the trailer toward the tow vehicle automatically synchronizes  
the trailer brakes with the tow vehicle brakes. As the trailer  
pushes against the tow vehicle the actuator telescopes  
together and applies force to the master cylinder, supplying  
hydraulic pressure to the trailer brakes.  
5. Adjust the brake shoes outward until the pressure of the  
lining against the wheel drum makes the wheel difficult  
to turn.  
6. Adjust, rotate the star wheel in the opposite direction  
until the wheel rotates freely with slight lining drag.  
7. Replace the adjusting hole cover and lower the trailer to  
the ground.  
Periodically check and test the surge “actuator” to make  
sure that it is functioning correctly. Never use an undersize  
actuator.  
8. Repeat steps 1 through 7 on the remaining brakes.  
Table 12. Hydraulic Brake Troubleshooting  
Symptom  
Possible Cause  
Solution  
Repair or replace.  
Reburnish or replace.  
Correct weight.  
No Brakes  
Brake line broken or kinked?  
Brake lining glazed?  
Trailer overloaded?  
Weak Brakes or Brakes Pull to  
One Side  
Brake drums scored or grooved?  
Tire pressure correct?  
Machine or replace.  
Inflate all tires equally.  
Match tires.  
Tires unmatched on the same axle?  
Brake components loose, bent or broken?  
Brake drums out-of-round?  
System lubricated?  
Replace components.  
Replace.  
Locking Brakes  
Noisy Brakes  
Lubricate.  
Brake components correct?  
Replace and correct.  
Brake lining thickness incorrect or not  
adjusted correctly?  
Install new shoes and  
linings.  
Dragging Brakes  
Replace rubber parts  
fill with dot 4 fluid.  
Enough brake fluid or correct fluid?  
PAGE 46 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)TRAILER MAINTENANCE  
Suspension  
Tires/Wheels/Lug Nuts  
The leaf suspension springs and associated components  
(Figure 57) should be visually inspected every 6,000 miles  
for signs of excessive wear, elongation of bolt holes, and  
loosening of fasteners. Replace all damaged parts  
(suspension) immediately. Torqued suspension components  
as detailed in Table 14.  
Tires and wheels are a very important and critical  
components of the trailer. When specifying or replacing the  
trailer wheels it is important the wheels, tires, and axle are  
properly matched.  
CAUTION:  
DO NOT attempt  
to repair or  
modify a wheel.  
DO NOT install in  
inner tube to correct a leak through the rim. If the rim is  
cracked, the air pressure in the inner tube may cause pieces  
of the rim to explode (break off) with great force and cause  
serious eye or bodily injury.  
Tire Wear/Inflation  
Tire inflation pressure is the most important factor in tire life.  
Pressure should be checked cold before operation DO NOT  
bleed air from tires when they are hot!. Check inflation  
pressure weekly during use to insure the maximum tire life  
and tread wear.  
Figure 57. Major Suspension Components  
Table 10 (Tire Wear Troubleshooting) will help pinpoint the  
causes and solutions of tire wear problems.  
Table 14. Suspension Torque Requirements  
Item  
Torque (Ft.-Lbs.)  
MIN-30 MAX-35  
MIN-45 MAX-60  
MIN-45 MAX-60  
3/8" U-BOLT  
7/16" U-BOLT  
1/2" U-BOLT  
SNUG FIT ONLY. PARTS MUST ROTATE FREELY.  
LOCKING NUTS OR COTTER PINS ARE PROVIDED  
TO RETAIN NUT-BOLT ASSEMBLY.  
SHACKLE BOLT  
SPRING EYE BOLT  
SHOULDER TYPE  
SHACKLE BOLT  
MIN-30 MAX-50  
CAUTION:  
ALWAYS wear safety glasses when removing  
or installing force fitted parts.Failure to comply  
may result in serious injury.  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 47  
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DCA-125USJ (50 HZ)TRAILER MAINTENANCE  
Lug NutTorque Requirements  
It is extremely important to apply and maintain proper wheel  
mounting torque on the trailer. Be sure to use only the  
fasteners matched to the cone angle of the wheel. Proper  
procedure for attachment of the wheels is as follows:  
1. Start all wheel lug nuts by hand.  
2. Torque all lug nuts in sequence (see Figure 58). DO NOT  
torque the wheel lug nuts all the way down.Tighten each  
lug nut in 3 separate passes as defined by Table 15.  
3. After first road use, retorque all lug nuts in sequence.  
Check all wheel lug nuts periodically.  
Table 15. Tire Torque Requirements  
Wheel Size  
First Pass  
FT-LBS  
Second Pass  
FT-LBS  
Third Pass  
FT-LBS  
12"  
13"  
14"  
15"  
16"  
20-25  
20-25  
20-25  
20-25  
20-25  
35-40  
35-40  
50-60  
50-60  
50-60  
50-65  
50-65  
90-120  
90-120  
90-120  
Figure 59. Wheel Lug Nuts  
Tightening Sequence  
NEVER use an pneumatic air  
gun to tighten wheel lug nuts.  
NOTE  
PAGE 48 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)TRAILERWIRING DIAGRAM  
Figure 59. Trailer/Towing Vehicle Wiring Diagram  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 49  
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DCA-125USJ (50 HZ)— GENERATORWIRING DIAGRAM  
Figure 60. Generator Wiring Diagram  
PAGE 50 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— ENGINEWIRING DIAGRAM  
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 51  
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DCA-125USJ (50 HZ)TROUBLESHOOTING (GENERATOR)  
Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a  
breakdown, use Table 16 shown below for diagnosis of the Generator. If the problem cannot be remedied, consult our  
company's business office or service plant.  
TABLE 16. GENERATOR TROUBLESHOOTING  
SYMPTOM  
No Voltage Output  
POSSIBLE PROBLEM  
AC Voltmeter defective?  
SOLUTION  
Check output voltage using a voltmeter.  
Check wiring and repair.  
Is wiring connection loose?  
Is AVR defective?  
Replace if necessary.  
Defective Rotating Rectifier?  
Defective Exciter Field?  
Is engine speed correct?  
Is wiring connections loose?  
Defective AVR?  
Check and replace.  
Check for 17.3 ohms across J & K on CN1  
Turn engine throttle lever to "High".  
Check wiring and repair.  
Low Voltage Output  
Replace if necessary.  
High Voltage Output  
Is wiring connections loose?  
Defective AVR?  
Check wiring and repair.  
Replace if necessary.  
Circuit Breaker Tripped  
Short Circuit in load?  
Over current?  
Check load and repair.  
Confirm load requirements and reduce.  
Check and replace.  
Defective circuit breaker?  
Over current Relay actuated?  
Confirm load requirement and replace.  
PAGE 52 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)TROUBLESHOOTING (ENGINE CONTROLLER)  
Practically all breakdowns can be prevented by proper handling and maintenance inspections, but in the event of a  
breakdown, use Table 17 (Engine Controller Troubleshooting) as a basic guideline for troubleshooting the Microprocessor  
Engine Controller unit (MPEC). If the problem cannot be remedied, consult our company's business office or service plant.  
TABLE 17. ENGINE CONTROLLER TROUBLESHOOTING  
Sympton  
Possible Cause  
Solution  
Low oil level?  
Fill oil level.  
Oil pressure sending unit failure?  
Time delay malfuntion in Controller?  
Wire shorted?  
Replace oil pressure sending unit.  
Refer to dealer.  
Low oil pressure light  
is on.  
Inspect/repair wire.  
Fill coolant level.  
Low coolant level?  
Low coolant level light  
is on.  
Sending unit failure?  
Replace sending unit.  
Replace/charge battery.  
Tighten/replace fan belt.  
Clean/repair radiator grill.  
Close doors.  
Low battery voltage?  
Fan belt tension incorrect?  
Air flow is not circulation through radiator?  
Doors open?  
Exhaust leaking?  
Replace/repair gaskets or faulty part.  
Check/reduce load.  
Replace thermostat.  
Clear all air intakes.  
Replace temperature switch.  
Fill fuel level.  
High coolant  
temperture light is on.  
Generator being overloaded?  
Thermostat failure?  
Air intake blocked?  
Temperature switch failure?  
No or low Fuel?  
Overcrank light is on.  
Overspeed light is on.  
Controller needs to be calibrated?  
RPM engine speed too high?  
Governor actuator needs to be adjusted?  
Governor controller needs to be adjusted?  
Engine Controller needs to be calibrated?  
Magnetic pick up out of adjustment?  
Magnetic pick up dirty?  
Refer to dealer.  
Adjust RPM.  
Adjust governor actuator.  
Adjust governor controller.  
Refer to dealer.  
Adjust magnetic pick up.  
Clean magnetic pick up.  
Loss of MPU light(s) or  
on.  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 53  
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EXPLANATION OF CODE IN REMARKS COLUMN  
How to read the marks and remarks used in this parts book.  
Items Found In theRemarks” Column  
Serial Numbers-Where indicated, this indicates a serial number  
range (inclusive) where a particular part is used.  
Model Number-Where indicated, this shows that the  
corresponding part is utilized only with this specific model number  
or model number variant.  
Items Found In theItems Number” Column  
All parts with same symbol in the number column, , #, +, %,  
*
or <, belong to the same assembly or kit  
If more than one of the same  
reference number is listed, the last  
one listed indicates newest (or  
latest) part available.  
The contents of this catalog are  
subject to change without notice.  
PAGE 54 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— SUGGESTED SPARE PARTS  
DCA-125USJ (50 HZ)W/JOHN DEERE  
4045TF275 DIESEL ENGINE  
1TO 3 UNITS  
Qty.  
P/N  
Description  
5 .............. 0602041292 ........................FILTER, OIL  
5 .............. 0602042594 ........................FILTER, FUEL, PRIMARY  
5 .............. 0602042595 ........................FILTER, FUEL, FINAL  
3 .............. 0602046377 ........................ELEMENT, AIR  
1 .............. 0602011493 ........................BELT, FAN  
1 .............. 0605505070 ........................CAP. FUEL TANK  
1 .............. 0602122272 ........................UNIT, OIL PRESSURE  
1 .............. 0602123261 ........................UNIT, WATERTEMPERATURE  
2 .............. 0601802149 ........................FUSE, 10A  
1 .............. 1518183040 ........................SENDER, WATER SWITCH (ENGINE SIDE)  
1 .............. 1718939010 ........................SENDER, OIL SWITCH (ENGINE SIDE)  
Part number on this Suggested Spare Parts  
list may supercede/replace the P/N shown  
in the text pages of this book.  
NOTE  
1
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DCA-125USJ (50 HZ)— GENERATOR ASSY.  
GENERATOR ASSY.  
PAGE 56 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— GENERATOR ASSY.  
GENERATOR ASSY.  
NO.  
1
PART NO.  
PART NAME  
ROTOR ASSY.  
FIELD ASSY.  
FAN  
QTY.  
REMARKS  
C0110000002  
1
1
1
8
1-1  
*
1-2  
1-3  
1-4  
1-5  
1-6  
1-7  
1-8  
1-9  
8131070013  
8131611014  
8131015003  
0012112035  
0042612000  
8101026013  
0601821349  
0601822601  
8001020004  
8001020504  
0010110020  
0040010000  
0601000209  
0071906312  
C0130000503  
0845041804  
8131315202  
8101350013  
0012110060  
0042610000  
0041210000  
0010112035  
0041212000  
0041212000  
8131310104  
8131312204  
8131331003  
0017106012  
8101333003  
0010106030  
0040006000  
0041206000  
M3163400003  
0343204150  
0043604000  
0070506306  
0012810030  
0012810030  
8131332014  
0600815000  
0605000063  
0030016000  
0040016000  
*
*
*
*
*
*
*
*
COUPLING DISK  
BALANCING PLATE ............................................1 ............. PURCHASE SET OF 1-14  
HEX HEAD BOLT  
SPRINGWASHER  
SET PLATE, RECTIFIER ....................................1 ............. PURCHASE SET OF 1-14  
RECTIFIER .........................................................2 ............. PT3610  
SURGE ABSORBER...........................................1 ............. ERZ-M14JK621A  
INSULATORWASHER  
INSULATORWASHER  
HEX, HEAD BOLT  
SPRINGWASHER  
BALANCING WEIGHT KIT  
10  
10  
1-10  
1-11  
1-12  
1-13  
1-14  
1-15  
2
1
1
4
4
1
*
*
*
*
*
*
BEARING ............................................................1 ............. 6312DDUC3  
STATOR ASSY.  
GROMMET  
END BRACKET  
1
2
1
1
4
4
4
6
6
6
1
1
1
10  
1
2
2
2
1
8
8
1
12  
12  
1
1
2
3
4
5
6
7
8
9
FIELD ASSY. EXCITER  
HEX, HEAD BOLT  
SPRINGWASHER  
PLAIN WASHER  
HEX, HEAD BOLT  
SPRINGWASHER  
PLAIN WASHER  
COVER, BEARING  
GASKET, BEARING  
COVER, END BRACKET  
HEX, HEAD BOLT  
COVER, END BRACKET  
HEX, HEAD BOLT  
SPRINGWASHER  
PLAIN WASHER  
COUPLING RING  
HEX, HEAD BOLT  
SPRINGWASHER  
BEARING, 6306ZZ  
HEX, HEAD BOLT  
HEX, HEAD BOLT  
COVER, FAN  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
29A  
NUT  
RUBBER SUSPENSION, KA120SS  
HEX, NUT  
SPRINGWASHER  
2
2
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 57  
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DCA-125USJ (50 HZ)— CONTROL BOX ASSY.  
CONTROL BOX ASSY.  
PAGE 58 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— CONTROL BOX ASSY.  
CONTROL BOX ASSY.  
NO.  
1
2
3
4
5
6
7
8
PART NO.  
PART NAME  
CONTROL BOX  
EDGING  
QTY.  
1
2
REMARKS  
M3213000702  
0330000180  
0601808823  
0021006080  
0601823863  
0027104016  
0601820671  
0027105016  
0601806118  
0027106016  
0601820845  
0601820846  
0027104016  
0207004000  
M3213500013  
0016906016  
M3270100104  
047230402  
CIRCUIT BREAKER, 300A ............................... 1 ........... LAF3630010393P  
MACHINE SCREW  
RELAY UNIT ..................................................... 2 ........... MSA9013A  
MACHINE SCREW  
AUTOMATICVOLTAGE REGULATOR................ 1 ........... NTA-5A-2DB  
MACHINE SCREW  
CURRENTTRANSFORMER ............................. 3 ........... 814-943 200/5A  
MACHINE SCREW  
OVER CURRENT RELAY .................................. 1 ........... LR2D1308  
OVER CURRENT RELAY .................................. 1 ........... LA7D1064  
MACHINE SCREW  
HEX, NUT  
CONTROL BOX COVER  
HEX, HEAD BOLT  
SELECTOR SWITCH ........................................ 1 ........... XUSS01574  
KNOB, SELECTOR SWITCH  
SPACER  
SWITCH BRACKET  
EDGING  
MACHINE SCREW  
HEX, HEAD BOLT  
SWITCH COVER  
HEX, HEAD BOLT  
HEX, HEAD BOLT  
TOOTHEDWASHER  
CONTROL PANEL  
FREQUENCY METER ...................................... 1 ........... FCF-6 45~65Hz 240V  
AC AMMETER .................................................. 1 ........... ACF-6 0~200A/400A:5A  
CHANGE-OVER SWITCH, AMMETER ............. 1 ........... SL-2AS  
4
4
4
9
10  
11  
12  
13  
13A  
14  
15  
16  
16A  
17  
18  
19  
20  
21  
22  
23  
24  
24A  
25  
26  
27  
28  
29  
30  
6
2
2
1
4
1
8
1
2
4
6
1
4
10  
1
M3276600004  
M3213600503  
03300003330  
0027104010  
0016906016  
M3213600604  
0016906016  
0016906016  
0040506000  
M3223000503  
0601807641  
0601808988  
0601801040  
0601806859  
0601801041  
1
AC VOLTMETER ............................................... 1 ........... SCF-6 0~600V  
CHANGE-OVER SWITCH, VOLTMETER .......... 1 ........... SL-2VS  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 59  
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DCA-125USJ (50 HZ)— CONTROL BOX ASSY.  
CONTROL BOX ASSY.  
PAGE 60 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— CONTROL BOX ASSY.  
CONTROL BOX ASSY.  
NO.  
31  
32  
33  
34  
35  
35A  
36  
36A  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
52A  
52B  
53  
54  
55  
56  
57  
57A  
60  
61  
62  
63  
PART NO.  
PART NAME  
QTY.  
REMARKS  
0601840073  
0601840121  
ECUCAN71  
0601831340  
0027104040  
0207004000  
0602103092  
0601810245  
0602120096  
0602122093  
0602123092  
0602121080  
0602125090  
0601810141  
0601831330  
M1223100004  
M3223100004  
0027105010  
0027105010  
M9220100004  
0080200007  
0602202592  
0027106018  
LY2DDC12V  
PTF08A  
RHEOSTAT (VOLTAGE REGULATOR) ............... 1 ........... RA20A2SE102BJ 2W 1k OHM  
KNOB  
CONTROLLER, 50Hz  
SWITCH ............................................................ 1 ........... 7562K4  
MACHINE SCREW  
HEX, NUT  
PREHEAT LAMP ............................................... 1 ........... PL-05  
BULB  
TACHOMETER .................................................. 1 ........... 111812  
OIL PRESSURE GAUGE .................................. 1 ........... 100174  
WATERTEMPERATURE GAUGE ..................... 1 ........... 100182  
CHARGING AMMETER .................................... 1 ........... 100158  
FUEL GAUGE.................................................... 1 ........... 100176  
PANEL LIGHT.................................................... 1 ........... 8826800370  
SWITCH, PANEL LIGHT ................................... 1 ........... 90-0001  
STOPPER  
STOPPER  
MACHINE SCREW  
MACHINE SCREW  
SET SCREW  
SNAP RING  
1
1
2
2
1
1
1
4
4
2
2
STARTER RELAY .............................................. 1 ........... AT141011  
MACHINE SCREW  
RELAY  
BASE  
CLIP  
2
1
1
2
2
PYCA1  
0027104020  
0601823240  
0602122272  
1518183040  
0602103092  
0601810245  
M3246701904  
M3357201102  
M3357200304  
0601802149  
0601823240  
MACHINE SCREW  
RECTIFIER ....................................................... 1 ........... DE4503  
UNIT, OIL PRESSURE ...................................... 1 ........... 108497  
SENDER, WATER SWITCH............................... 1 ........... REPLACES P/N 0602123282  
ALARM LAMP, PL095 ....................................... 1 ........... 8400041~  
BULB ................................................................. 1 ........... 8400041~  
WIRE HARNESS, GENERATOR  
WIRE HARNESS, ENGINE  
WIRE HARNESS, FUEL LEAK ......................... 1 ........... 8400041~  
FUSE................................................................. 2 ........... F-106510A  
RECTIFIER ....................................................... 1 ........... DE4503  
1
1
64  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 61  
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DCA-125USJ (50 HZ)— ENGINE AND RADIATOR ASSY.  
ENGINE AND RADIATOR ASSY.  
PAGE 62 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— ENGINE AND RADIATOR ASSY.  
ENGINE AND RADIATOR ASSY.  
NO.  
1
1-1  
1-2  
1-3  
1-4  
2
3
4
5
6
PART NO.  
PART NAME  
QTY.  
REMARKS  
M3923200054  
0602041292  
0602042594  
0602042595  
0602011493  
0602060003  
0602061000  
0012110095  
0042510000  
M2303200303  
0010312030  
0040012000  
0605000060  
0030012000  
0040012000  
C0923200124  
0602011062  
M9200100904  
0150000016  
M3131300103  
0016910025  
0016910025  
M3310500813  
M3310500903  
0605515148  
0605515147  
0601822794  
0017110035  
0602046258  
0602046377  
0602040650  
0602040596  
0016908020  
0207008000  
M3373100003  
0605515146  
ENGINE & RADIATOR SET .................................1........ JOHN DEERE 6068TF275  
CARTRIDGE, OIL FILTER ....................................1........ RE504836  
CARTRIDGE, PRIMARY, FUEL FILTER ...............1........ RE517181  
CARTRIDGE, FINAL, FUEL FILTER ....................1........ RE509031  
FAN BELT .............................................................1........ 2402  
BLOWER FAN ......................................................1........ AT39247  
FAN SPACER .......................................................1........ R81911  
HEX, HEAD BOLT  
SPRINGWASHER  
ENGINE FOOT  
HEX, HEAD BOLT  
SPRINGWASHER  
RUBBER SUSPENSION  
HEX, NUT  
SPRINGWASHER  
RADIATOR  
CAP, RADIATOR  
PLUG  
4
4
2
6
6
2
2
2
1
1
1
1
1
6
4
1
1
3
1
2
8
7
8
9
10  
11  
12  
12A  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
24A  
25  
26  
27  
28  
29  
30  
O-RING  
FAN BRACKET  
HEX, HEAD BOLT  
HEX, HEAD BOLT  
RADIATOR HOSE  
RADIATOR HOSE  
HOSE BAND  
HOSE BAND  
FAN MOTOR  
HEX, HEAD BOLT  
AIR CLEANER .....................................................1........ FRG100297  
ELEMENT, AIR CLEANER ...................................1........ P778214  
INDICATOR, AIR CLEANER .................................1........ RBXO0-2252  
BAND, AIR CLEANER  
HEX, HEAD BOLT  
HEX, NUT  
2
4
4
1
1
HOSE, AIR CLEANER  
HOSE BAND  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 63  
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DCA-125USJ (50 HZ)— ENGINE AND RADIATOR ASSY.  
ENGINE & RADIATOR ASSY.  
PAGE 64 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— ENGINE AND RADIATOR ASSY.  
ENGINE & RADIATOR ASSY.  
NO.  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
52  
53  
54  
55  
56  
57  
58  
PART NO.  
PART NAME  
HOSE BAND  
ADAPTER  
90 DEGREE ELBOW  
CONNECTOR  
ROCKNUT  
VALVE  
HOSE JOINT  
CAP  
DRAIN HOSE  
RESERVE TANK  
CAP, RESERVE TANK  
BRACKET, RESERVE TANK  
HEX, HEAD BOLT  
HOSE  
HOSE  
HOSE  
HOSE BAND  
BLOWBY HOSE  
HOSE BAND  
RELAY BRACKET  
RELAY ............................................................... 1 ........... AT141011  
MACHINE SCREW  
HEX, NUT  
HEX, HEAD BOLT  
TOOTHEDWASHER  
UNIT, WATERTEMPERATURE  
QTY.  
1
1
1
1
1
1
1
1
1
1
1
1
3
1
1
1
REMARKS  
0605515197  
0602022563  
0602022561  
0603306590  
0603300285  
0605511395  
0603306395  
0602021070  
0269200450  
M9300000203  
0602010900  
M3316100303  
0016908020  
0199102200  
0193600700  
0193601000  
0605515106  
M3326000204  
0605515149  
M3260600104  
0602202592  
0027106016  
0030006000  
0017112025  
0040512000  
0602123261  
1718939010  
3
1
1
1
2
2
1
1
1
SENDER, OIL SWITCH..................................... 1 ........... REPLACES P/N 0602122281  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 65  
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DCA-125USJ (50 HZ)— OUTPUTTERMINAL ASSY.  
OUTPU
PAGE 66 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— OUTPUTTERMINAL ASSY.  
OUTPUT TERMINAL ASSY.  
NO.  
1
2
3
4
5
6
7
8
PART NO.  
PART NAME  
QTY.  
1
5
REMARKS  
M3230700003  
M9220100304  
M9220100404  
0039316000  
0040016000  
0041416000  
0016908035  
M3236100503  
M3236100404  
0605010040  
0027103010  
0030003000  
0041203000  
0027103010  
0030003000  
0016906020  
0016906016  
M3236400004  
M3236300004  
0016906020  
0601808803  
0601808804  
M1260700304  
022100150  
TERMINAL PANEL  
OUTPUT TERMINAL BOLT  
TIE BOLT  
5
HEX, NUT  
10  
15  
20  
5
1
1
2
4
4
4
4
4
2
4
1
1
6
SPRINGWASHER  
PLAIN WASHER  
HEX, HEAD BOLT  
TERMINAL COVER  
OUTPUTWINDOW  
HINGE  
MACHINE SCREW  
HEX, NUT  
PLAIN WASHER  
MACHINE SCREW  
HEX, NUT  
HEX, HEAD BOLT  
HEX, HEAD BOLT  
CABLE OUTLET COVER  
SUPPORTER, CABLE OUTLET COVER  
HEX, HEAD BOLT  
CIRCUIT BREAKER, 1-POLE 20A.................... 2 ........... QOU 120B  
CIRCUIT BREAKER, 2-POLE 50A.................... 3 ........... QOU 250B  
BREAKER FITTING COVER  
CUSHION RUBBER  
HEX, HEAD BOLT  
RECEPTACLE ................................................... 2 ........... GF530EM 125V 20A X 2  
RECEPTACLE ................................................... 3 ........... CS6369 250V 50A  
MACHINE SCREW  
HEX, NUT  
TERMINAL COVER  
HEX, HEAD BOLT  
PLAIN WASHER  
STAY RUBBER  
HEX, NUT  
9
10  
11  
11A  
11B  
12  
12A  
13  
14  
15  
16  
17  
18  
19  
20  
20A  
21  
22  
23  
24  
24A  
25  
26  
27  
28  
29  
30  
31  
32  
33  
1
1
2
0016906020  
0601812598  
0601812538  
0027104016  
0207004000  
M3236100213  
0010112045  
0041212000  
M9310200004  
0030012000  
0603306775  
0027104016  
0601815194  
0027104016  
10  
10  
1
2
2
2
2
2
4
BLIND PLUG  
MACHINE SCREW  
TERMINAL  
1
2
MACHINE SCREW  
ADD THE FOLLOWING DIGITS AFTER THE PART NUMBER  
WHEN ORDERING ANY PAINTED PANEL TO INDICATE  
COLOR OF UNIT:  
1-ORANGE  
5-BLACK  
2-WHITE  
3-SPECTRUM GREY  
4-SUNBELT GREEN  
6-CATERPILLAR YELLOW  
7-CATO GOLD  
8-RED  
THE SERIAL NUMBER MAY BE REQUIRED.  
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 67  
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DCA-125USJ (50 HZ)— BATTERY ASSY.  
BATTERY ASSY.  
PAGE 68 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— BATTERY ASSY.  
BATTERY ASSY.  
NO.  
1
2
3
4
5
6
PART NO.  
PART NAME  
QTY.  
REMARKS  
0602220196  
M9310500404  
M9103000504  
0602220921  
M3346900904  
M3346901004  
BATTERY ....................................................... 1 ............. 4D-2  
BATTERY SHEET  
BATTERY BAND  
BATTERY BOLT SET  
BATTERY CABLE  
BATTERY CABLE  
1
1
2
1
1
7
8
8A  
9
9A  
10  
CABLE ........................................................... 1 ............. MAKE LOCALLY  
0030012000  
0040012000  
0017112025  
0040512000  
0040520000  
HEX, NUT  
1
1
1
1
1
SPRINGWASHER  
HEX, HEAD BOLT  
TOOTHEDWASHER  
TOOTHEDWASHER  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 69  
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DCA-125USJ (50 HZ)— MUFFLER ASSY.  
MUFFLER ASSY.  
PAGE 70 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— MUFFLER ASSY.  
MUFFLER ASSY.  
NO.  
1
2
3
4
5
6
7
7
8
9
9
10  
PART NO.  
PART NAME  
MUFFLER  
HEX, HEAD BOLT  
EXHAUST PIPE  
GASKET  
HEX, HEAD BOLT  
GASKET  
HEX, HEAD BOLT  
HEX, HEAD BOLT ............................................. 4 ........... S/N 8500015~  
EXHAUST PIPE  
HEX, HEAD BOLT  
HEX, HEAD BOLT ............................................. 4 ........... S/N 8500015~  
CLAMP  
QTY.  
REMARKS  
M3330100402  
0017112030  
M3333000903  
M3333200304  
0017110040  
M3333200204  
0017108040  
0017110035  
M3333000803  
0016908055  
0017110050  
0602325066  
1
4
1
1
4
1
4
1
4
1
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 71  
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DCA-125USJ (50 HZ)— FUELTANK ASSY.  
FUEL TANK ASSY.  
PAGE 72 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— FUELTANK ASSY.  
FUEL TANK ASSY.  
NO.  
1
1A  
1B  
1C  
2
2A  
3
4
5
6
7
8
8A  
8B  
8C  
9
10  
11  
12  
13  
14  
15  
PART NO.  
PART NAME  
QTY.  
1
1
1
1
1
1
2
4
8
8
8
4
8
4
12  
1
2
REMARKS  
M3363001402  
0605505070  
0605501074  
0605516090  
M3363001504  
0605505070  
0191700260  
0605515149  
M3363200404  
M9310500104  
0016908020  
0016908055  
0030008000  
0207308000  
0041208000  
0191302500  
0605515109  
0191301200  
0191301200  
0605515109  
0602042601  
0222101000  
FUELTANK  
FUEL TANK CAP  
FUEL SENDER UNIT  
GASKET  
FUELTANK  
FUEL TANK CAP  
CONNECT HOSE  
HOSE BAND  
TANK BAND  
SUPPORTER SHEET  
HEX, HEAD BOLT  
HEX, HEAD BOLT  
HEX, NUT  
HEX, NUT  
PLAIN WASHER  
VENT HOSE  
HOSE BAND  
SUCTION HOSE  
RETURN HOSE  
HOSE BAND  
RETURN PIPE .................................................. 1 ........... RE67050  
TANK SHEET  
1
1
4
6
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 73  
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DCA-125USJ (50 HZ)— ENCLOSURE #1 ASSY.  
ART  
ANEL TO  
ELLOW  
THE SERIAL NUMBER MAY BE REQUIRED.  
PAGE 74 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— ENCLOSURE #1 ASSY.  
ENCLOSURE #1 ASSY.  
NO.  
1
2
3
4
5
5
5A  
5A  
5A  
6
PART NO.  
PART NAME  
BASE  
ENVIRONMENTALTANK  
HEX, HEAD BOLT  
PLUG  
FRONT FRAME................................................. 1 ........... S/N 8500001TO 8500040  
FRONT FRAME................................................. 1 ........... S/N 8500041~  
ACOUSTIC SHEET ........................................... 1 ........... S/N 8500001TO 8500035  
ACOUSTIC SHEET ........................................... 1 ........... S/N 8500036TO 8400040  
ACOUSTIC SHEET ........................................... 1 ........... S/N 8500041~  
FRONT FRAME................................................. 1 ........... S/N 8500001TO 8500040  
FRONT FRAME................................................. 1 ........... S/N 8500041~  
ACOUSTIC SHEET ........................................... 1 ........... S/N 8500001TO 8500035  
ACOUSTIC SHEET ........................................... 1 ........... S/N 8500036TO 8500040  
ACOUSTIC SHEET ........................................... 1 ........... S/N 8500041~  
GROMMET........................................................ 1 ........... S/N 8500036TO 8500040  
GROMMET........................................................ 1 ...........  
QTY.  
1
1
12  
1
REMARKS  
M3413001812  
M3363300303  
0016910030  
0603306797  
M3423001202  
M3423001602  
M3493107813  
M3493107823  
M3493111303  
M3423001302  
M3423001702  
M3493107813  
M3493107823  
M3493111303  
0601851739  
0601850100  
0016908020  
0016910025  
M3131400203  
M3131400103  
M3131400004  
0016908020  
0016906020  
M3423500104  
0016906016  
M3423200704  
0016906020  
M3423200804  
0016906016  
M3310300104  
M3310300004  
0016906020  
M3423201003  
M3423201203  
M3493107904  
0016908020  
0019208020  
M3433000803  
M3433000813  
6
6A  
6A  
6A  
7
8
9
HEX, HEAD BOLT  
HEX, HEAD BOLT  
26  
6
10  
11  
11A  
11B  
12  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
22  
22A  
23  
23  
24  
24  
HOSE COVER ................................................... 1 ........... S/N 8500001TO 8500040  
HOSE COVER ................................................... 1 ........... S/N 8500041~  
HOSE COVER ................................................... 1 ........... S/N 8500041~  
HEX, HEAD BOLT ............................................. 4 ........... S/N 8500001TO 8500040  
HEX, HEAD BOLT ........................................... 13 ........... S/N 8500041~  
BRACKET  
1
6
2
14  
1
6
1
1
14  
HEX, HEAD BOLT  
DUCT COVER  
HEX, HEAD BOLT  
DUCT COVER  
HEX, HEAD BOLT  
FAN SHROUD  
FAN SHROUD  
HEX, HEAD BOLT  
COVER, FRONT FRAME .................................. 1 ........... S/N 8500001TO 8500035  
COVER, FRONT FRAME .................................. 1 ........... S/N 8500036~  
ACOUSTIC SHEET  
HEX, HEAD BOLT ........................................... 26 ........... S/N 8500001TO 8500040  
HEX, HEAD BOLT ........................................... 26 ........... S/N 8500041~  
CENTER FRAME .............................................. 1 ........... S/N 8500001TO 8500035  
CENTER FRAME .............................................. 1 ........... S/N 8500036~  
1
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 75  
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DCA-125USJ (50 HZ)— ENCLOSURE #1 ASSY.  
ADD THE FOLLOWING DIGITS AFTER THE PART  
NUMBER WHEN ORDERING ANY PAINTED PANEL TO  
INDICATE COLOR OF UNIT:  
1-ORANGE  
5-BLACK  
2-WHITE  
3-SPECTRUM GREY  
4-SUNBELT GREEN  
6-CATERPILLAR YELLOW  
7-CATO GOLD  
8-RED  
THE SERIAL NUMBER MAY BE REQUIRED.  
PAGE 76 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— ENCLOSURE #1 ASSY.  
ENCLOSURE #1 ASSY.  
NO.  
24A  
24A  
25  
25A  
25B  
25C  
26  
26A  
26B  
26C  
27  
27A  
28  
28A  
29  
30  
31  
31A  
32  
33  
34  
35  
35A  
36  
36  
37  
37  
38  
PART NO.  
PART NAME  
QTY.  
REMARKS  
M3493200614  
M3493201204  
0010114040  
0030014000  
0040014000  
0041214000  
0010120050  
0030020000  
0040020000  
0041220000  
M3463100802  
M3493503914  
M3463200502  
M3493504003  
M3463200704  
0016906016  
M3463200803  
M3493504104  
0016908020  
M3463400003  
0016908020  
M3423200604  
M3493108004  
0016908020  
0019208020  
0016910025  
0019210025  
M3310600004  
0016908020  
0016908020  
M3483100004  
0016908020  
0016908020  
0040508000  
0016906016  
0605503062  
M1414800104  
0017108020  
ACOUSTIC SHEET ........................................... 1 ........... S/N 8500001TO 8500040  
ACOUSTIC SHEET ........................................... 1 ........... S/N 8500041~  
HEX, HEAD BOLT  
HEX, NUT  
SPRINGWASHER  
PLAIN WASHER  
HEX, HEAD BOLT  
HEX, NUT  
SPRINGWASHER  
PLAIN WASHER  
ROOF PANEL  
ACOUSTIC SHEET  
ROOF PANEL  
ACOUSTIC SHEET  
BACK PLATE  
HEX, HEAD BOLT  
DUCT  
ACOUSTIC SHEET  
HEX, HEAD BOLT  
DUCT COVER  
HEX, HEAD BOLT  
OVER COVER, FRONT FRAME  
ACOUSTIC SHEET  
HEX, HEAD BOLT ........................................... 49 ........... S/N 8500001TO 8500040  
HEX, HEAD BOLT ........................................... 49 ........... S/N 8500041~  
HEX, HEAD BOLT ............................................. 8 ........... S/N 8500001TO 8500040  
HEX, HEAD BOLT ............................................. 8 ........... S/N 8500041~  
COVER, RADIATOR CAP  
HEX, HEAD BOLT  
HEX, HEAD BOLT  
COVER, EXHAUST PIPE  
HEX, HEAD BOLT ............................................. 2 ........... S/N 8500001TO 8500040  
HEX, HEAD BOLT ............................................. 1 ........... S/N 8500041~  
TOOTHEDWASHER  
4
4
4
8
4
4
4
8
1
1
1
1
1
6
1
1
8
1
6
1
1
1
4
6
1
39  
40  
41  
42  
43  
43A  
44  
45  
46  
1
HEX, HEAD BOLT ............................................. 2 ........... S/N 8500001TO 8500035  
FUEL LEAK DETECTION SWITCH .................. 1 ........... S/N 840003~  
BRACKET ......................................................... 1 ........... S/N 840003~  
HEX HEAD BOLT .............................................. 2 ........... S/N 840003~  
47  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 77  
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DCA-125USJ (50 HZ)— ENCLOSURE #2 ASSY.  
ENCLOSURE #2 ASSY.  
ADD THE FOLLOWING DIGITS AFTER THE PART  
NUMBER WHEN ORDERING ANY PAINTED PANEL TO  
INDICATE COLOR OF UNIT:  
1-ORANGE  
5-BLACK  
2-WHITE  
3-SPECTRUM GREY  
4-SUNBELT GREEN  
6-CATERPILLAR YELLOW  
7-CATO GOLD  
8-RED  
THE SERIAL NUMBER MAY BE REQUIRED.  
PAGE 78 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— ENCLOSURE #2 ASSY.  
ENCLOSURE #2 ASSY.  
NO.  
1
1
1A  
2
2
2A  
3
4
5
5A  
6
PART NO.  
PART NAME  
QTY.  
REMARKS  
M3443000802  
M3443000812  
M3493303203  
M3443000904  
M3443000914  
M3493303304  
0016908020  
0016910025  
M3443301003  
M3493303404  
0016908020  
M3443200503  
M3443600304  
0207306000  
0041206000  
M9113000002  
0021806016  
0030006000  
M9110100204  
M9116100004  
0016908020  
M3453200802  
M3453200812  
M3493417004  
M3493417014  
0016908065  
0016910025  
M3453002503  
M3493416804  
M3453002603  
M3493416904  
M3453002703  
M3493417204  
M3453002803  
M3493417104  
M9113000002  
C9312500004  
0021806016  
0030006000  
M9110100804  
M9110100904  
M9116100004  
0016908020  
0019208020  
0601850097  
0027208025  
M9310000004  
REAR FRAME ................................................... 1 ........... S/N 8500001TO 8500035  
REAR FRAME ................................................... 1 ........... S/N 8500036~  
ACOUSTIC SHEET  
1
DUCT ................................................................. 2 ........... S/N 8500001TO 8500035  
DUCT ................................................................. 2 ........... S/N 8500036~  
ACOUSTIC SHEET  
HEX, HEAD BOLT  
HEX, HEAD BOLT  
COVER, REAR FRAME  
ACOUSTIC SHEET  
HEX, HEAD BOLT  
DOOR, REAR FRAME  
WINDOW PLATE  
HEX, NUT  
PLAIN WASHER  
DOOR HANDLE ASSY.  
MACHINE SCREW  
HEX, NUT  
2
26  
4
1
1
13  
1
1
8
8
1
4
4
2
2
3
7
8
9
9A  
10  
11  
11A  
12  
13  
14  
15  
15  
15A  
15A  
16  
17  
18  
18A  
19  
19A  
20  
20A  
21  
21A  
22  
22A  
23  
23A  
24  
25  
26  
27  
27  
28  
29  
30  
HINGE  
WASHER  
HEX, HEAD BOLT  
SPLASHER PANEL ........................................... 1 ........... S/N 8500001TO 8500035  
SPLASHER PANEL ........................................... 1 ........... S/N 8500036~  
ACOUSTIC SHEET ........................................... 1 ........... S/N 8500001TO 8500035  
ACOUSTIC SHEET ........................................... 1 ........... S/N 8500036~  
HEX, HEAD BOLT ............................................. 4 ........... S/N 8500001TO 8500040  
HEX, HEAD BOLT ............................................. 2 ........... S/N 8500041~  
SIDE DOOR  
ACOUSTIC SHEET  
SIDE DOOR  
ACOUSTIC SHEET  
SIDE DOOR  
ACOUSTIC SHEET  
SIDE DOOR  
ACOUSTIC SHEET  
DOOR HANDLE ASSY.  
SEAL RUBBER  
MACHINE SCREW  
HEX, NUT  
1
1
1
1
1
1
1
1
4
4
16  
16  
6
5
11  
HINGE  
HINGE  
WASHER  
HEX, HEAD BOLT ........................................... 26 ........... S/N 8500001TO 8500040  
HEX, HEAD BOLT ........................................... 26 ........... S/N 8500041~  
STOPPER  
MACHINE SCREW  
CAP  
8
8
13  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 79  
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DCA-125USJ (50 HZ)— RUBBER SEALS ASSY.  
RUBBER SEALS ASSY.  
PAGE 80 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— RUBBER SEALS ASSY.  
RUBBER SEALS ASSY.  
NO.  
1
2
3
4
5
6
7
8
PART NO.  
PART NAME  
QTY.  
1
1
3
2
1
4
3
4
3
1
4
1
1
1
2
1
REMARKS  
0229200870  
0229201130  
0229201240  
0228900660  
0229201070  
0229200125  
0228901165  
0228900925  
0228901105  
0228900565  
0228900945  
0228800505  
0229201200  
0228800635  
0228800970  
0228800595  
0228100640  
0228100370  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
RUBBER SEAL  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
2
2
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 81  
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DCA-125USJ (50 HZ)— NAMEPLATE AND DECALS ASSY.  
NAMEPLATE AND DECALS ASSY.  
PAGE 82 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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DCA-125USJ (50 HZ)— NAMEPLATE AND DECALS ASSY.  
NAMEPLATE AND DECALS ASSY.  
NO.  
1
2
3
4
5
5
6
7
PART NO.  
PART NAME  
QTY.  
REMARKS  
M1550000204  
M1550000703  
M3550000004  
M3550001603  
M3550001703  
M3550002003  
M3550001803  
M9500000004  
M9500100004  
M9500300004  
M9500300104  
M9500500004  
M9503000004  
M9503000103  
M9503100004  
M9503200004  
M9510000004  
M9510100004  
M9510100403  
M9520000004  
M9520000104  
M9520000204  
M9520000504  
M9520100004  
M9520100204  
M9520100304  
M9520100404  
M9520100503  
M9520100603  
M9520200003  
M9520200104  
M9512200004  
M9510200304  
M3560102004  
M3560102103  
M3560102204  
M3560102303  
M3560102403  
M3560102504  
0600500092  
DECAL, NOTE ................................................... 1 ........... M15000020  
DECAL, AUXILARY OUTPUT............................ 1 ........... M15000070  
DECAL, NOTE ................................................... 1 ........... M35000000  
DECAL, GENERATOR CONTROL ..................... 1 ........... M35000160  
DECAL, ENGINE OPERATING, M35000170..... 1 ........... S/N 8500001TO 8500040  
DECAL, ENGINE OPERATING, M35000200..... 1 ........... S/N 8500041~  
DECAL, OPERATING PROCEDURES .............. 1 ........... M35000180A  
DECAL, OIL DRAIN PLUG ................................ 1 ........... M90000000  
DECAL, WATER................................................. 1 ........... M90010000  
DECAL, NEGATIVE........................................... 1 ........... M90030000  
DECAL, POSITIVE ........................................... 1 ........... M90030010  
DECAL, DIESEL FUEL ..................................... 1 ........... M90050000  
DECAL, WARNING MOVING PARTS ................ 2 ........... M90300000  
DECAL, WATER OIL CHECK ............................ 1 ........... M90300010  
DECAL, WARNING HOT COOLANT .................. 1 ........... M90310000  
DECAL, WARNING ENGINE EXHAUST ........... 1 ........... M90320000  
DECAL, FLUID DRAIN ...................................... 1 ........... M91000000  
DECAL, CAUTION HOT PARTS ........................ 1 ........... M91010000  
DECAL, CAUTION ............................................. 1 ........... M91010040  
DECAL, GROUND ............................................. 1 ........... M92000000  
DECAL, AMMETER CHANGE-OVER SW......... 1 ........... M92000010  
DECAL, VOLTMETER CHANGE-OVER SW. ..... 1 ........... M92000020  
DECAL, START CONTACT................................ 1 ........... M92000050  
DECAL, WARNING ELECTRIC HAZARD .......... 2 ........... M92010000  
DECAL, CAUTION ............................................. 1 ........... M92010020A  
DECAL, SAFETY INSTRUCTIONS ................... 1 ........... M92010030  
DECAL, DANGER HIGHVOLTAGE ................... 1 ........... M92010040  
DECAL,WARNING ............................................ 1 ........... M92010050  
DECAL, CAUTION ............................................. 2 ........... M92010060  
DECAL, CONNECTION OF OUTPUT CABLE .. 1 ........... M92020000  
DECAL, OVER CURRENT RELAY .................... 1 ........... M92020010  
DECAL, MQ....................................................... 1 ........... M91220000  
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
39A  
40  
DECAL, MQ POWER  
STRIPE  
STRIPE, WHISPERWATT  
STRIPE  
STRIPE, 125  
STRIPE, 125  
STRIPE  
PLATE, MQ POWER ......................................... 1 ........... S/N 8400031~  
MACHINE SCREW............................................ 4 ........... S/N 8400031~  
DECAL, ENVIRONMENTALWARNIN6.............. 1 ........... S/N 8400031~  
3
2
2
2
1
1
2
0021106016  
M9510100304  
1
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 83  
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Effective:October 1, 2002  
TERMS AND CONDITIONS OF SALE — PARTS  
PAYMENT TERMS  
5. Parts must be in new and resalable  
condition,intheoriginalMultiquippack-  
age (if any), and with Multiquip part  
numbersclearlymarked.  
Rebatesforpricedeclinesandaddedcharges  
for price increases will not be made for stock  
onhandatthetimeofanypricechange.  
Terms of payment for parts are net 10 days.  
FREIGHTPOLICY  
Multiquip reserves the right to quote and sell  
directtoGovernmentagencies,andtoOriginal  
Equipment Manufacturer accounts who use  
our products as integral parts of their own  
products.  
All parts orders will be shipped collect or  
prepaidwiththechargesaddedtotheinvoice.  
All shipments are F.O.B. point of origin.  
Multiquip’sresponsibilityceaseswhenasigned  
manifesthasbeenobtainedfromthecarrier,  
andanyclaimforshortageordamagemustbe  
settledbetweentheconsigneeandthecarrier.  
6. Thefollowingitemsarenotreturnable:  
a. Obsolete parts. (If an item is in the  
price book and shows as being  
replaced by another item, it is  
obsolete.)  
SPECIALEXPEDITINGSERVICE  
b. Any parts with a limited shelf life  
(such as gaskets, seals, “O” rings,  
and other rubber parts) that were  
purchased more than six months  
priortothereturndate.  
A$35.00surchargewillbeaddedtotheinvoice  
forspecialhandlingincludingbusshipments,  
insuredparcelpostorincaseswhereMultiquip  
mustpersonallydeliverthepartstothecarrier.  
MINIMUMORDER  
TheminimumchargeforordersfromMultiquip  
is $15.00 net. Customers will be asked for  
instructionsregardinghandlingofordersnot  
meetingthisrequirement.  
LIMITATIONSOFSELLER’SLIABILITY  
c. Anylineitemwithanextendeddealer  
netpriceoflessthan$5.00.  
Multiquip shall not be liable here under for  
damagesinexcessofthepurchasepriceofthe  
itemwithrespecttowhichdamagesareclaimed,  
andinnoeventshallMultiquipbeliableforloss  
of profit or good will or for any other special,  
consequentialorincidentaldamages.  
RETURNEDGOODSPOLICY  
d. Special order items.  
Returnshipmentswillbeacceptedandcredit  
willbeallowed,subjecttothefollowingprovi-  
sions:  
e. Electricalcomponents.  
f. Paint,chemicals,andlubricants.  
g. Decalsandpaperproducts.  
h. Itemspurchasedinkits.  
1. AReturnedMaterialAuthorizationmust  
be approved by Multiquip prior to ship-  
ment.  
LIMITATIONOFWARRANTIES  
Nowarranties,expressorimplied,aremadein  
connectionwiththesaleofpartsortradeacces-  
soriesnorastoanyenginenotmanufactured  
byMultiquip.Suchwarrantiesmadeinconnec-  
tion with the sale of new, complete units are  
madeexclusivelybyastatementofwarranty  
packagedwithsuchunits,andMultiquipnei-  
ther assumes not authorizes any person to  
assume for it any other obligation or liability  
whatever in connection with the sale of its  
products.Apartfromsuchwrittenstatementof  
warranty, there are no warranties, express,  
impliedorstatutory,whichextendbeyondthe  
descriptionoftheproductsonthefacehereof.  
7. The sender will be notified of any  
materialreceivedthatisnotacceptable.  
2. ToobtainaReturnMaterialAuthorization,  
alistmustbeprovidedtoMultiquipParts  
Salesthatdefinesitemnumbers,quanti-  
ties, and descriptions of the items to be  
returned.  
8. Such material will be held for five  
workingdaysfromnotification,pending  
instructions. If a reply is not received  
within five days, the material will be  
returnedtothesenderathisexpense.  
a. Thepartsnumbersanddescriptions  
must match the current parts price  
list.  
9. Creditonreturnedpartswillbeissuedat  
dealer net price at time of the original  
purchase,lessa15%restockingcharge.  
b. The list must be typed or computer  
generated.  
10. Incaseswhereanitemisaccepted,for  
which the original purchase document  
cannotbedetermined,thepricewillbe  
basedonthelistpricethatwaseffective  
twelvemonthspriortotheRMAdate.  
c. The list must state the reason(s) for  
thereturn.  
d. The list must reference the sales  
order(s)orinvoice(s)underwhichthe  
itemswereoriginallypurchased.  
11. Credit issued will be applied to future  
purchasesonly.  
e. The list must include the name and  
phonenumberofthepersonrequest-  
ingtheRMA.  
PRICINGANDREBATES  
Prices are subject to change without prior  
notice.Pricechangesareeffectiveonaspe-  
cific date and all orders received on or after  
that date will be billed at the revised price.  
3. AcopyoftheReturnMaterialAuthoriza-  
tionmustaccompanythereturnshipment.  
4. Freight is at the sender’s expense. All  
partsmustbereturnedfreightprepaidto  
Multiquip’sdesignatedreceivingpoint.  
PAGE 84 — DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05)  
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NOTE PAGE  
DCA-125USJ (50 HZ) — OPERATION AND PARTS MANUAL — REV. #0 (03/11/05) — PAGE 85  
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PARTS AND OPERATION MANUAL  
OPERATION AND PARTS MANUAL  
HERE'S HOW TO GET HELP  
PLEASE HAVETHE MODEL AND SERIAL  
NUMBER ON-HANDWHEN CALLING  
MQ POWER CORPORATE OFFICE  
18910 Wilmington Ave.  
Carson, CA 90746  
800-421-1244  
FAX:310-632-2656  
PARTS DEPARTMENT  
800-427-1244  
310-537-3700  
FAX:800-672-7877  
FAX:310-637-3284  
SERVICE DEPARTMENT  
800-835-2551  
FAX:310-638-8046  
310-537-3700  
TECHNICAL ASSISTANCE  
800-478-1244  
WARRANTYDEPARTMENT  
800-835-2551,EXT.279  
310-537-3700,EXT.279  
FAX:310-631-5032  
FAX:310-638-8046  
Manufactured for Multiquip Inc.  
by  
DENYO CO., LTD, JAPAN  
Your Local Dealer is:  
MQPOWER  
ADivisionofMultiquipInc.  
POST OFFICE BOX 6254  
CARSON, CA 90749  
310-537-3700 • 800-421-1244  
FAX:310-632-2656  
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