OPERATION AND PARTS MANUAL
MC-44S
CONCRETE MIXER
Revision #8 (09/15/11)
To find the latest revision of this
publication, visit our website at:
THIS MANUAL MUST ACCOMPANYTHE EQUIPMENT AT ALLTIMES.
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MC-44S CONCRETE MIXER — PROPOSITION 65WARNING
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NOTE PAGE
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 3
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MC-44S CONCRETE MIXER — TABLE OF CONTENTS
ComponetDrawings
MULTIQUIP MC-44S
Nameplate and Decals....................................... 34-35
Mixer Assembly (Steel Drum) ............................ 36-37
Main Frame Assembly ....................................... 38-39
Axle Assembly .................................................... 40-41
Cabinet Assembly .............................................. 42-43
Gas Engine Mounting Plate Asasembly............ 44-45
Electric Motor Mounting Plate Asasembly ........ 46-47
Concrete Mixer
Proposition 65 Warning ............................................. 2
Table Of Contents ..................................................... 4
Parts Ordering Procedures ....................................... 5
Specifications ............................................................ 6
Dimensions (Mixer) ................................................... 7
Safety Message Alert Symbols ................................. 8
Rules For Safe Operation .................................... 9-10
Operation and Safety Decals .................................. 11
General Information ................................................ 12
Mixer Basic Components ........................................ 13
Basic Engine Components...................................... 14
Handwheel Assembly.............................................. 15
Towing Guidelines ................................................... 16
Safety Chain Connection ........................................ 17
Electric Motor ..................................................... 18-19
Pre-Inspection (Gasoline Engine) ........................... 20
Initial Start-up (Gasoline Engine)............................ 21
Initial Start-up (Electric Motor) ................................ 22
Operation ................................................................ 23
Maintenance (Engine)........................................ 24-25
Maintenance (Mixer) .......................................... 26-28
Troubleshooting (Engine)........................................ 30
Troubleshooting (Engine/Mixer) .............................. 31
Explanation Of Code In Remarks Column .............. 32
Suggested Spare Parts ........................................... 33
HONDAGX120K1QX2 Engine
Air Cleaner Assembly......................................... 48-49
Camshaft Assembly ........................................... 50-51
Carburetor Assembly ......................................... 52-53
Control Assembly ............................................... 54-55
Crankcase Cover Assembly............................... 56-57
Crankshaft Assembly ......................................... 58-59
Cylinder Barrel Assembly................................... 60-61
Cylinder Head Assembly.................................... 62-63
Fan Cover Assembly .......................................... 64-65
Flywheel Assembly ............................................ 66-67
Fuel Tank Assembly ........................................... 68-69
Ignition Coil Assembly ........................................ 70-71
Muffler Assembly ............................................... 72-73
Piston Assembly................................................. 74-75
Recoil Starter Assembly..................................... 76-77
Gasket Kit Assembly .......................................... 78-79
Labels Assembly ................................................ 80-81
Terms and Condition Of Sale
—
Parts .................... 82
Specification and part number
are subject to change without
notice.
PAGE 4 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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PARTS ORDERING PROCEDURES
Ordering parts has never been easier!
Choose from three easy options:
Effective:
January 1st, 2006
Best Deal!
Order via Internet (Dealers Only):
Order parts on-line using Multiquip’s SmartEquip website!
If you have an MQ Account, to obtain a Username
and Password, E-mail us at: parts@multiquip.
com.
■ View Parts Diagrams
■ Order Parts
■ Print Specification Information
To obtain an MQ Account, contact your
District Sales Manager for more information.
Use the internet and qualify for a 5% Discount
on Standard orders for all orders which include
complete part numbers.*
to log in and save!
Order Parts
Note: Discounts Are Subject To Change
Fax your order in and qualify for a 2% Discount
on Standard orders for all orders which include
complete part numbers.*
Order via Fax (Dealers Only):
All customers are welcome to order parts via Fax.
Domestic (US) Customers dial:
1-800-6-PARTS-7 (800-672-7877)
Note: Discounts Are Subject To Change
Domestic (US) Dealers Call:
Order via Phone:
1-800-427-1244
Non-Dealer Customers:
International Customers should contact
their local Multiquip Representatives for
Parts Ordering information.
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.
When ordering parts, please supply:
❒
Dealer Account Number
❒
Specify Preferred Method of Shipment:
❒
❒
❒
❒
❒
Dealer Name and Address
✓ UPS/Fed Ex
✓ DHL
✓ Truck
■
■
Priority One
Ground
Shipping Address (if different than billing address)
Return Fax Number
■ Next Day
Second/Third Day
Applicable Model Number
■
Quantity, Part Number and Description of Each Part
NOTICE
All orders are treated as Standard Orders and will
ship the same day if received prior to 3PM PST.
WE ACCEPT ALL MAJOR CREDIT CARDS!
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 5
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MC-44S CONCRETE MIXER — SPECIFICATIONS
Table 1. Specifications (Engine/Electric Motor)
Model
HONDA GX120K1QX2
Baldor 34F324-5596
Air-cooled 4 stroke, Single
Cylinder, OHV, Horizontal Shaft
Gasoline Engine
1/2 HP, Single-phase 115
VAC, Electric Motor
Type
2.7 in. X 1.7 in.
(60 mm x 42 mm)
Bore X Stroke
N/A
Displacement
Max Output
7.3 cu. in. (119 cc)
3.9 H.P./3,600 rpm
N/A
1/2 HP/1725 R.P.M.
Engine/Electric
Motor
Fuel Tank Capacity
Fuel
0.63 U.S. Gallons (0.60 Liters)
Unleaded Automobile Gasoline
0.63 qt. (0.6 liter)
N/A
N/A
N/A
Lube Oil Capacity
Speed Control
Method
Centrifugal Fly-weight Type
N/A
Starting Method
Input Voltage
Recoil Start
N/A
Electric
115 VAC Single Phase
Dimension
(L x W x H)
11.7 x 13.4 X 12.5 in.
(297 X 341 X 318 mm)
13.87 x 7.56 X 8.62 in.
(352 X 192 X 219 mm)
Dry Net Weight
28.7 lbs (13.0 Kg.)
Approx. 12 lbs (5.4 kg.)
Table 2. MC-44S Mixer Specifications
60 in. (1,525 mm)
Height
Width
51 in. (1,296 mm)
Length
66 in. (1,677 mm)
Maximum Drum Capacity
Maximum Mixing Capacity
Bag Capacity
6.35 cu. ft. (180 liters)
4 cu. ft. (113 liters)
(1/3 to 1/2 bag)
Weight - With Engine/ElectricMotor
495 lbs. (224 Kg.)
PAGE 6 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S CONCRETE MIXER — DIMENSIONS (MIXER)
See Table 2 for mixer dimensions
Figure 1. Mixer Dimensions
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 7
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MC-44S CONCRETE MIXER — SAFETY MESSAGE ALERT SYMBOLS
FORYOUR SAFETY ANDTHE SAFETY OF OTHERS!
HAZARD SYMBOLS
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.
Rotating Parts
This Owner's Manual has been
developed to provide complete
instructions for the safe and
efficient operation of the Multiquip
Model MC-44S (Steel) Concrete
Mixer.
NEVER operate equipment with covers, or
guards removed. Keep fingers, hands, hair and
clothing away from all moving parts to prevent
injury.
Before using these mixers,
ensure that the operating
individual has read and
understands all instructions in
this manual.
Accidental Starting
ALWAYS place the circuit breaker or power
ON/OFF switch in the OFF position when the
pump is not in use.
SAFETY MESSAGE ALERT SYMBOLS
Sight and Hearing hazard
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.
ALWAYS wear approved eye and hearing
protection.
DANGER: You WILL be KILLED or
SERIOUSLY injured if you do not follow
directions.
Respiratory Hazard
ALWAYS wear approved respiratory
protection.
WARNING: You CAN be KILLED or
SERIOUSLY injured if you do not follow
directions.
Equipment Damage Messages
CAUTION: You CAN be injured if you
Other important messages are provided throughout this manual
to help prevent damage to your mixer, other property, or the
surrounding environment.
do not follow directions.
Potential hazards associated with the Multiquip MC-44S
concrete mixer operation will be referenced with Hazard Symbols
which appear throughout this manual, and will be referenced in
conjunction with Safety Message Alert Symbols.
This mixer, other property, or the
surrounding environment could
be damaged if you do not follow
instructions.
PAGE 8 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S CONCRETE MIXER — RULES FOR SAFE OPERATION
■
NEVER touchthehotexhaustmanifold,
muffler or cylinder.Allow these parts to
cool before servicing engine or mixer.
DANGER:
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 Multiquip MC-44S Concrete Mixer:
■
■
HighTemperatures – Allow the engine to cool before adding
fuel or performing service and maintenance functions. Contact
with hot components can cause serious burns.
GENERAL SAFETY
■
DO NOT operate or service this equipment before
readingthisentiremanual.
The engine of this mixer requires an adequate free flow of
cooling air. NEVER! operate the mixer in any enclosed or
narrow area where free flow of the air is restricted. If the air
flow is restricted it will cause
■
■
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.
serious damage to the
mixer or engine and may
cause injury to people and
property. Remember the
mixer's engine (gasoline
models only) gives off
DEADLY gases.
■
■
NEVER operate this equipment when not feeling
well due to fatigue, illness or taking medicine.
■
■
ALWAYS refuel in a well-ventilated area, away from sparks
NEVER operate this equipment under the
influence or drugs or alcohol.
and open flames.
ALWAYS use extreme caution when working with flammable
liquids. When refueling, stop the engine and allow it to cool.
DO NOT smoke around or near the machine. Fire or explosion
could result from fuel vapors, or if fuel is spilled on a hot
engine.
■
■
■
Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.
■
NEVER operate the mixer in an explosive
atmosphere or near combustible
materials. An explosion or fire could result
causing severe bodily harm or even
death.
ALWAYS check the machine for loosened threads or bolts
before starting.
ALWAYS wear proper respiratory (mask) hearing and eye
protection equipment when operating the mixer.
■
■
Topping-off to filler port is dangerous, as it tends to spill fuel.
Refer to the Engine Owner's Manual for engine technical
questions or information.
■
■
NEVER use accessories or attachments, which are not
recommended by Multiquip for this equipment. Damage to
the equipment and/or injury to user may result.
■
NEVER! place hands inside the drum while the drum is
rotating.
Manufacturer does not assume responsibility for any accident
due to equipment modifications.
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 9
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MC-44S CONCRETE MIXER — RULES FOR SAFE OPERATION
■
■
■
■
NEVER run engine without air cleaner.Severe engine damage
■
NEVER disconnect any "emergency or safety devices".
These devices are intended for operator safety. Disconnection
of these devices can cause severe injury, bodily harm or even
death! Disconnection of any of these devices will void all
warranties.
may occur.
ALWAYS read, understand, and follow procedures in
Operator’s Manual before attempting to operate equipment.
ALWAYS be sure the operator is familiar with proper safety
precautions and operations techniques before using roller.
■
■
If mixer is equipped with an electric motor, operate electric
motor only at the specified voltage indicated on the nameplate.
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.
Make sure the OFF/ON power switch on the electric motor is
always in the OFF position before inserting the mixer's power
plug into an AC receptacle (electric model only).
■
■
■
■
NEVER leave the mixer unattended, turn off engine or electric
motor when unattended.
Maintenance Safety
■
NEVERlubricate components or attempt service on a running
machine.
CAUTION must always be observed while servicing this mixer.
Rotating parts can cause injury if contacted.
■
ALWAYS allow the machine a proper amount of time to cool
before servicing.
Unauthorized equipment modifications will void all
warranties.
■
■
Keep the machinery in proper running condition.
Ensure that any extension cable is protected against damage
and not liable to be tripped over or trapped underneath the
mixer.
Fix damage to the machine immediately and always replace
broken parts, or missing decals.
■
DO NOT allow extension cord to come into contact with water
■
■
■
Dispose of hazardous waste properly.Examples of potentially
hazardous waste are used motor oil, fuel and fuel filters.
or fluids.
■
■
DO NOT spray water onto electric motor.
DO NOT use food or plastic containers to dispose of
hazardous waste.
This mixer is intended for the production of concrete. Mixer
must be used only for its intended purpose.
DO NOT pour waste, oil or fuel directly onto the ground,
down a drain or into any water source.
■
This mixer is not suitable for the mixing of flammable or
explosive substances.
Emergencies
■
■
NEVER operate the mixer in an explosive atmosphere.
■
ALWAYS know the location of the nearest fire extinguisher
and first aid kit.
Before starting the mixer, check that all guards are in position
and correctly fitted.
■
Keep area around the mixer clear of obstructions which
could cause persons to fall onto moving parts.
■
■
ALWAYS ensure mixer is on level ground before mixing.
Become familiar with the controls of the mixer before
operating.
■
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 replace any worn or damaged warning decals.
Ensure the drum is rotating while filling and emptying the
drum.
■
■
ALWAYS disconnect AC power plug from power source
before moving mixer (electric model only).
High Temperatures – Always stop engine and allow the
engine to cool before adding fuel, oil or performing service
and maintenance functions. Contact with hot components
can cause serious burns.
PAGE 10 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S CONCRETE MIXER — OPERATION AND SAFETY DECALS
Machine Safety Decals
The Multiquip MC-44S mixer is equipped with a number of safety decals (Figure 1A). These decals are provided for operator safety
and maintenance information.The illustration below and on the next page shows these decals as they appear on the machine.
Should any of these decals become unreadable, replacements can be obtained from your dealer.
Figure 1A. MC-44S Mixer Decals
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 11
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MC-44S CONCRETE MIXER — GENERAL INFORMATION
Ensure that the extension cable is carefully laid out avoid-
Application
ing wet areas, sharp edges and locations where vehicles
might run over it. Avoid allowing the extension cable to be
trapped underneath the mixer.
This mixer is only intended for the production of concrete.
The mixer must be used for its intended purpose and is not
suitable for the mixing of flammable or explosive
substances. The mixer must not be used in an explosive
atmosphere. Use Table 4 (Mixing Hints) as a guide when
mixing concrete for various applications.
Unroll the extension cable fully or it will overheat and could
catch fire. Make sure that all extension cable connections
are dry and safe. Replace any defective or badly worn ex-
tension cable immediately.
Power Plants
The Multiquip MC42-S mixer can be powered by either a
Honda GX120K1QX2 air-cooled, 4-stroke gasoline engine or
a 1/2 HP electric motor.Refer toTable 2 to for specific engine
or electric motor data information.
Hardware
Check all hardware on the mixer before starting. Periodically
inspect all hardware. Loose hardware can contribute to early
component failure and poor performance. UseTable 3 as general
guideline when the torqueing of mixer hardware is required.
Remember to keep all mixer hardware components tight.
Electrical
If mixer is equipped with an electric motor, make sure that
the power being supplied to the motor corresponds to the
voltage rating label on the motor.Supplying the wrong voltage
to the electric motor will cause severe electrical damage to
the motor.
Table 3. Hardware Torque
Recommendations
Hardware
Torque (ft-lbs)
Diameter
5/16-inch x 18
3/8-inch x 16
14
24
Always make sure the OFF/ON switch on the electric motor
is in the OFF position before applying power.
It is strongly recommended when inserting the mixer's
power cord into a receptacle, that a G.F.C.I. (Ground Fault
Current Interrupter) receptacle be used (115 VAC
applications).
3/8-inch x 24
1/2-inch x 13
37
39
90
1/2-inch x 13
(Grade 8)
Extension Cables
Engine Maintenance
The extension cable should be a 3-wire configuration that
includes a ground wire that conforms to UL code. The wire
cross section must be a minimum of 2.5 mm2 . Choose an
extension cord of adequate current carrying capacity as ref-
erenced in Table 5. Remember distance affects the wire
size of the extension cable.
For basic engine maintenance, refer to the engine maintenance
section in this manual. For a more detailed engine maintenance,
refer to the Honda Engine Owner's manual furnished with the
engine.
Table 4. MIXING HINTS
BATCH QUANTITIES
SAND
APPROX. BATCH
OUTPUT
MIX
RATIOS
CEMENT 112 lbs.
(50 Kgs.)
STONE
CU. FT.
APPLICATIONS
Bag
CU. FT.
1-1/4
LTR
35
LTR
71
CU. FT.
3
LTR
85
1:2:4
1:3:6
1:4:8
1/2 BAG
1/3 BAG
1/4 BAG
2-1/2
2-1/2
2-1/2
Most Ordinary
Foundations
1-1/4
35
71
2-3/4
2-3/4
78
1-1/4
35
71
78
Rough Mass
Concrete
1:1-1/2:3
2/3 BAG
1-1/4
35
3
71
3
85
Watertight Floors,
Tanks, Pits, Etc.
PAGE 12 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S CONCRETE MIXER — MIXER BASIC COMPONENTS
Figure 2. Mixer Major Components
1.
Steel Mixing Drum — The Multiquip MC-44S concrete
mixer uses a 4 cu. ft steel mixing drum.This drum is to be
used for mixing of concrete. Always clean the drum after
each use. DO NOT use this mixing drum for the mixing of
volatile liquids.
8.
9.
Rigid Suspension — This mixer uses a rigid type
suspension. Check the mounting hardware for bolt hole
elongation and tightness. See maintenance section of this
manual for recommended maintenance.
Chock Blocks — Place these blocks (not included as
part of the mixer package) under each mixer wheel to
prevent rolling, when mixer is not connect to the towing
vehicle.
2.
3.
Dump Latch —To rotate the mixing drum, this latch must
be in the up position.To lock the drum, place the latch in the
down position.
10. Tires Ply — The tire ply (layers) number is rated in letters;
This mixer uses 13-inch 2-ply tires. Replace with only
recommended type tires.
Dump Gear Guard — NEVER operate the mixer with this
guard removed. Its purpose is to prevent dirt and debris
from entering the dump gear. In addition operator clothing
could become entangled in the dump gear, causing severe
injury and bodily harm.
11. ON/OFF Switch (gasoline only) —This switch is provided
on mixer with gasoline engines only and is located on the
side of the mixer frame. When activated it will shut down
the engine. Pull out when starting the engine.
4.
5.
Handwheel — Turn this wheel clockwise or counter-
clockwise to rotate the mixing drum. Remember the dump
latch must be in the up position in order for the mixing
drum to be rotated.
12. Cabinet/Latch — Encloses engine and electric motor.
NEVER run mixer with cabinet removed. Use latches to
secure engine compartment cabinet.
Zerk Fittings — There is, at the bottom and engine side
of the yoke, and center of the handwheel grease zerk
fittings. Lubricate these fittings as referenced in the
maintenance section of this manual.
13. Mixing Blades (Steel) — Used for the mixing of concrete.
When blades show signs of wear, entire steel mixing drum
assembly must be replaced. See steel mixing drum
assembly in the parts section of this manual.
6.
7.
Safety Chain — This mixer uses a 3/16-inch thick, 72-
inches long zinc-plated saftey chain.ALWAYS connect the
safety chain when towing.
14. Forklift Pockets – When lifting of the mixer is required,
use these fork lift pockets to lift the mixer. Remember to
insert the forks of the forklift a minimum of 24 inches into
the lift pockets.
Tow Bar — This mixer uses various towing bars, please
reference the frame assembly drawing and parts list in this
manual to determine which tow bar meets your
requirements.
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 13
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MC-44S CONCRETE MIXER — BASIC ENGINE COMPONENTS
Honda GX Series Engine Shown
Figure 3. Engine Controls and Components
INITIAL SERVICING
5.
6.
FuelValve Lever – OPEN to let fuel flow, CLOSE to stop
the flow of fuel.
The engine (Figure 3) must be checked for proper lubrication and
filled with fuel prior to operation. Refer to the manufacturers Engine
manual for instructions & details of operation and servicing.
Choke Lever – Used in the starting of a cold engine, or in
cold weather conditions. The choke enriches the fuel
mixture.
7.
Air Cleaner – Prevents dirt and other debris from entering
the fuel system. Remove wing-nut on top of air filter
cannister to gain access to filter element.
1.
Fuel Filler Cap – Remove this cap to add unleaded
gasoline to the fuel tank. Make sure cap is tightened
securely. DO NOT over fill.
NOTE
WARNING
WARNING
Operating the engine without an air filter,
with a damaged air filter, or a filter in need of
replacement will allow dirt to enter the
engine, causing rapid engine wear.
Adding fuel to the tank should be accomplished only
when the engine is stopped and has had an
opportunity to cool down. In the event of a fuel spill,
8.
9.
Spark Plug – Provides spark to the ignition system. Set
spark plug gap to 0.6 - 0.7 mm (0.028 - 0.031 inch). Clean
spark plug once a week.
DO NOT attempt to start the engine until the fuel residue has been
completely wiped up, and the area surrounding the engine is dry.
2.
Throttle Lever – Used to adjust engine RPM speed (lever
advanced forward SLOW, lever back toward operator
FAST).
Muffler – Used to reduce noise and emissions.
WARNING
3.
4.
Engine ON/OFF Switch – ON position permits engine
starting, OFF position stops engine operations.
Engine components can generate extreme heat.
To prevent burns, DO NOT touch these areas
while the engine is running or immediately after operating. NEVER
operate the engine with the muffler removed.
Recoil Starter (pull rope) – Manual-starting method. Pull
the starter grip until resistance is felt, then pull briskly and
smoothly.
10. Fuel Tank – Holds unleaded gasoline. For additional
information refer to engine owner's manual.
PAGE 14 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S CONCRETE MIXER — HANDWHEEL ASSEMBLY
Assembly
The Multiquip MC-44S concrete mixer is shipped with the
handwheel detached. Attach the handwheel to the mixer as
shown in Figure 4.
Figure 4. Handwheel Assembly
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 15
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MC-44S CONCRETE MIXER —TOWING GUIDELINES
■
■
■
■
Check wheel mounting lug nuts with a torque wrench.
Torque wheel lug nuts as described in the maintenance
section of this manual.
Towing Safety Precautions
CAUTION:
Check tightness of U-clamp nuts, torque suspension
hardware as referenced in the maintenance section of this
manual.
■
Check with your county or state safety
towing regulations department before
towing your mixer.
Avoid sudden stops and starts.This can cause skidding, or
jackknifing. Smooth, gradual starts and stops will improve
gas milage.
To reduce the possibility of an accident while transporting
the mixer on public roads, always make sure that the mixer
towing components and the towing vehicle are in good
operating condition and both units are mechanically sound.
Avoid sharp turns to prevent rolling.
CAUTION:
The following list of suggestions should be used when towing
the mixer:
If the mixer tow bar is deformed or damaged
replace entire tow bar. NEVER tow the mixer
with a defective tow bar. There exist the
possibility of the trailer separating from the
towing vehicle.
■
Make sure that the hitch and coupling of the towing vehicle
are rated equal to, or greater than the trailer "gross vehicle
weight rating" (GVWR).
■
■
■
■
■
■
ALWAYS inspect the hitch and coupling for wear. NEVER
tow the mixer with defective hitches, couplings, chains etc.
Tow Bar to Vehicle Connection (Coupler Only)
1. Check the vehicle hitch ball, and mixer's coupler for
signs of wear or damage. Replace any parts that are
worn or damaged before towing.
CHECK the tire air pressure on both the towing vehicle and
the trailer.Also check the tire tread wear on both vehicles.
ALWAYS make sure the mixer is equipped with a "Safety
Chain".
2. Use only a 2-inch ball diameter (towing vehicle), this
will match the mixer's 2-inch coupler. Use of any other
ball diameter will create an extremely dangerous condition
which can result in separation of the coupler and ball or
ball failure.
ALWAYS attach trailer's safety chain to the frame of towing
vehicle.
ALWAYS make sure that the towing vehicle's directional,
backup, and brake lights are working properly.
3. After tow bar has been connected to mixer (see next
page), attach mixer's coupler to the hitch ball on the
towing vehicle securely and make sure the lock lever
is in the down position (locked).
Remember in most cases the maximum speed unless
otherwise posted for highway towing is 45 MPH, however
before towing your mixer, check your local state, and county
vehicle towing requirements. Recommended off-road towing
is not to exceed 10 MPH or less depending on type of terrain.
■
■
■
■
Place chocked blocks underneath wheels to prevent rolling,
while parked, if disconnected from towing vehicle.
Mixer Tow Bar Vehicle Connection (Pintle and Loop)
1. Make sure the bumper on the towing vehicle is
equipped to handle either a pintle or loop type tow
bar configuration.
Inflate tires to correct pressure, inspect tires for cuts, and
excessive wear.See Table 16 (Tire Wear Troubleshooting).
When towing of the mixer is required, place the drum in the
up position (mouth facing upwards).
2. After tow bar has been connected to mixer (see next
page), secure either type of tow bar to the towing vehicle,
following state and county towing regulations.
ALWAYS make sure that the fuel valve lever is in the OFF
position (gasoline models only).
3. As a minimum, use a 1/2-inch bolt and nylock nut grade
5 when securing either tow bar to the towing vehicle,
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MC-44S CONCRETE MIXER — SAFETY CHAIN CONNECTION
2. Route the safety chain through the holes just above the
tow bar, located on each side of the mixer stand.
CAUTION:
NEVER ! tow the mixer with the safety chain
removed. The safety chain is intended to
prevent complete separation of the mixer from
the towing vehicle in the event of a tow bar
failure.
Loop the chain together and place under the tow bar.
Secure the loop with the connector link.
3. Extend the safety chain along the length of the tow bar,
looping it through the tow bar's connector link. Remove
any excess chain slack.
Reference Figure 5 for the installation of the Safety Chain.
4. Connect the free end of (clevis safety hook) the safety
chain to the towing vehicle. Remember it is critical
that the length of the chain be properly adjusted, to
prevent the draw bar and the front of the mixer stand
from dropping to the the ground (contact) in the event
the draw bar becomes disconnected from the towing
vehicle.
Tow Bar to Mixer Connection
1. Insert the tow bar through the round opening at the
bottom of the mixer stand.
Align the hole on the tow bar with the hole on the mixer
frame, and insert 1/2-inch bolt through tow bar and frame.
Secure tow bar to frame with 1/2-inch nylock nut.Tighten
to 40 ft.-lbs.
Figure 5. Tow Bar and Safety Chain Installation
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 17
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MC-44S CONCRETE MIXER — ELECTRIC MOTOR
Electric Motor
Table 5. Recommended Extension Cord Sizes
For maintenance care and operation of the electric motor, refer
to your electric motor instruction booklet furnished with the electric
motor.
Electric
Motor
Input
Voltage
50 ft.
(15.24 m)
75 ft.
100 ft.
200 ft.
(22.86 m) (30.48 m) (60.96 m)
Protect the electric motor from dust as much as possible and
keep ventilating openings clean.
1/2 HP
115 VAC
No. 12
No. 10
No. 8
No. 6
CAUTION:
■
■
DO NOT spray water at any time on the
electric motor.
Electric MotorVoltage Change Switch
DO NOT operate electric motor in a
explosive environment.
1.
ALWAYS make certain the electric motor's ON/OFF switch
is in the "OFF" position and the power cord has been
disconnected from the power source.
The electric motor used in this mixer is a single-phase 1.5 HP
motor. The input voltage requirement for this motor is either 115
or 230VAC only.
Electric Motor Connection
NEVER! disable or disconnect the
ON/OFF switch on the electric motor.
A 12 inch electrical cable (Figure 2) with a pigtail at one end is
provided with the electrical motor for hookup to a power source.
Table 1. shows the required NEMA connector for the desired
motor horsepower rating. In addition, Table 2 also shows the
matching NEMA approved connector for the required extension
cord.
It is provided for operator safety.Injury
may result if it is disable, disconnected
or improperly maintained.
ALWAYS, make certain that the power source required for the
electric motor is correct and always use the correct NEMA
configuration plug. Failure to supply the correct voltage to the
motor can severely damage the motor.
The electric motor supplied with the mixer is configured from the
factoryfor115VACgroundedoperation.Makecertainthatthecorrect
size grounded (3-wires) extension cord is used.SeeTable 5.
Motors can burn out when the line voltage falls 10% below the
voltage rating of the motor. Failure to use proper voltage will
cause the motor to overheat and actuate the overload switch.
If overload protection should actuate because of improper voltage
or any other malfunction, turn the main switch on the motor to the
"OFF" position and correct the problem, press the reset switch
button, and turn the main switch to the "ON" position.
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MC-44S CONCRETE MIXER — ELECTRIC MOTOR
Figure 6. Single Phase Electric Motor with 12 inch Pigtail Cable
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MC-44S CONCRETE MIXER — PRE-INSPECTION (GAS ENGINE)
Before Starting
Table 6. Oil Type
1. Read safety instructions at the beginning of manual.
Season
Summer
Spring/Fall
Winter
Temperature
25°C or Higher
25°C~10°C
Oil Type
SAE 10W-30
SAE 10W-30/20
SAE 10W-10
2. Clean the mixer, removing dirt and dust, particularly the
engine cooling air inlet, carburetor and air cleaner.
3. Check theairfilterfor dirtanddust. Ifairfilterisdirty,replace
air filter with a new one as required.
0°C or Lower
4. Check carburetor for external dirt and dust. Clean with dry
compressedair.
Explosive Fuel
5. Checkfasteningnutsandboltsfortightness.
Fuel Check
Engine Oil Check
If your mixer has a gasoline engine, determine if the engine fuel
is low. If fuel is low, remove the fuel filler cap and fill with unleaded
gasoline. Motor fuels are highly flammable and can be dangerous
if mishandled. DO NOT smoke while refueling. DO NOT attempt
to refuel the trowel if the engine is hot! or running.
1. To check the engine oil level, place the mixer on
secure level ground with the engine stopped.
2. Remove the filler dipstick from the engine oil filler hole
(Figure 7) and wipe it clean.
1. Remove the gasoline cap located on top of fuel tank.
2. Visuallyinspecttoseeiffuellevelislow. Iffuelislow,replenish
with unleaded fuel.
3. When refueling, be sure to use a strainer for filtration. DO
NOT top-off fuel. Wipe up any spilled fuel.
V-belt Check
A worn or damagedV-belt can adversely affect the performance
of the mixer.If aV-belt is defective or worn simply replace theV-
belt as outlined in the maintenance section of this manual.
Figure 7. Engine Oil Dipstick (Removal)
Blade Check
3. Insert and remove the dipstick without screwing it into the
filler neck. Check the oil level shown on the dipstick.
Check for worn blades. If using a steel tub and the blades are
worn, replace the entire tub assembly. Remember the blades
are welded to tub.
4. If the engine oil level is low (Figure 8), fill to the edge of
the oil filler hole with the recommended oil type (Table 6).
See Table 2 for the oil capacity of your type engine.
If using a plastic tub, replace the blades using the part numbers
referenced in the parts section of this manual.
Start/Stop Switches
This mixer has been equipped with a start/stop switches for both
the gasoline and electric motor mixers.These switches should be
tested every time the engine or motor is started.
Grease Fittings (Zerk)
Check the zerk grease fittings (Figure 26) as shown in the
maintenancesectionofthismanual.Thesegreasefittingslubricate
the handwheel and the yoke mechanism.
Figure 8. Engine Oil Dipstick (Oil Level)
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MC-44S CONCRETE MIXER — INITIAL START-UP (GAS ENGINE)
Starting the Engine (Gasoline Only)
4.
Turn the engine switch (Figure 12) to the ON position.
The following steps outline the procedure for starting the engine.
Depending on the type of engine employed in the mixer the
steps may vary slightly. If your mixer has an electric motor
disregard this section.
1.
Move the fuel shut-off lever (Figure 9) to the ON position.
Figure 12. Engine ON/OFF Switch
5.
Located at the rear of the mixer frame is the main start/
stop button (Figure 13). Pull this button outward to start the
engine.
Figure 9. Fuel Shut-OFF Lever
2.
To start a cold engine, move the choke lever (Figure 10) to
the CLOSED position.
Figure 13. Engine Start/Stop Button
6.
Pull the starter grip (Figure 14) lightly until you feel
resistance, then pull briskly.The drum should be rotating at
this time.
Figure 11. Choke Lever
3.
Move the throttle lever (Figure 11) away from the slow
position, about 1/3 of the way toward the fast position.
Figure 14. Starter Grip
Figure 11. Throttle Lever
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MC-44S CONCRETE MIXER — INITIAL START-UP (ELECTRIC MOTOR)
5. Plug the other end of the extension cord into a 120 VAC
G.F.C.I.protected receptacle. Rememberthepowerrequire-
ments for this electric motor is 120VAC, 60 Hz. The use of
any other input voltage will severely damage the motor.
Initial Start-up Instructions (Electric Motor)
Starting
CAUTION:
DO NOT attempt to operate the mixer until
CAUTION:
the Safety, General Information and
Inspection sections have been read and
understood.
ALWAYS read the label on the electric motor
before applying power.The label will indicate
the proper power requirements for the motor.
Remember the use of any other input voltage
will severely damage the motor.
1. Before starting, make sure mixer is positioned on a secure
flat surface to prevent rolling.
CAUTION:
2. Use an extension cord (see Table 5) of adequate current
carryingcapacity,insert theelectricmotor'spowerplug into
one end of the extension cord.
To prevent tripping (Figure 16) of personnel,
position the extension cord so that it lays flat
and is not curled underneath the mixer.
3. NEVER! use a worn or frayed extension cord.
4. NEVER! operate mixer withV-belt cover removed.
DANGER
NEVER! touch the power cord (Figure 15)
with wet hands or while standing in water
when it is connected to a power source.The
possibly exists of electrical shock
(electrocution) even death. NEVER! spray
water directly on the electric motor.
Figure 16. Extension Cord (Tripping)
WARNING:
ALWAYS read the label on the electric motor
before applying power.The label will indicate
the correct power requirements for the motor.
Remember the use of an incorrect input
voltage will severely damage the electric
motor.
Figure 15. Extension Cord (Wet Hands)
Starting the Electric Motor
1.
Set the electric motor's ON/OFF switch (Figure 17) to the
ON position.
To prevent personnel from tripping over
the extension cord, position the
NOTE
extension cord so that it lays flat and is
not curled underneath the mixer.
Figure 17. Electric Motor ON/OFF Switch
(ON Position)
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MC-44S CONCRETE MIXER — OPERATION
3. Placingtheshovelallthewayinsidethedrum(Figure20)will
causetheshoveltostriketheblades.Thisconditionwillmake
Operation
1. Topositionthetub,makesurethemixerisplacedonfirmlevel
ground,thenpulluponthedumplatch (Figure18)andturn
thehandwheeluntilthetubisatthedesiredposition.Once
thetubisatthedesiredposition,pulldownonthedumplatch
to lock the tub in position.
the shovel rotate, and could cause injury to personnel.
NEVER place hands inside the mixing drum while it is
rotating.
Figure 20. Filling Mixing Drum
Stopping the Mixer (Gasoline)
1.
Push the main start/stop switch (Figure 21) inward to stop
the engine.
Figure 18. Mixing Drum Positioning
CAUTION:
NEVER stand in front or behind the mixing
drum while it is being placed in the dump
position. Stay clear of the mixing drum while
it is being positioned.
Figure 21. Start/Stop Button (Stop Position)
2.
3.
Place fuel shut-off lever in the OFF position.
2. As the drum rotates, use a shovel (Figure 19) to place the
cementmixinsidethedrum,addwaterasrequired.Becareful
to only place the tip of the shovel inside the drum.
Clean drum of all debris and foreign matter.
Stopping the Mixer (Electric)
1.
Place the electric motor's ON/OFF switch (Figure 22) in
the OFF position.
Figure 22. Electric Motor ON/OFF Switch
(OFF Position)
2.
3.
Disconnect the electric motor's extension cord from its
power source.
Figure 19. Filling Mixing Drum
Clean drum of all debris and foreign matter.
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 23
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MC-44S CONCRETE MIXER — MAINTENANCE (ENGINE)
UseTable 7 as a general maintenance guideline when servicing
your engine. For more detail engine maintenance information,
refer to the engine owner's manual supplied with your engine.
Table 7. Engine Maintenance Schedule
FIRST
EVERY
EVERY
EVERY
YEAR
OR
EVERY
2 YEARS
OR
MONTH 3 MONTHS 6 MONTHS
OR
DESCRIPTION (3)
OPERATION
BEFORE
OR
OR
10 HRS.
25 HRS.
50 HRS.
100 HRS.
200 HRS.
CHECK
CHANGE
CHECK
X
Engine Oil
X
X
X
Air Cleaner
All Nuts & Bolts
Spark Plug
CHANGE
X (1)
Re-tighten If
Necessary
CHECK-CLEAN
REPLACE
CHECK
X
X
X
Cooling Fins
Spark Arrester
Fuel Tank
CLEAN
X
X
CLEAN
Fuel Filter
CHECK
X
Idle Speed
CHECK-ADJUST
CHECK-ADJUST
CHECK
X (2)
Valve Clearance
Fuel lines
X (2)
Every 2 years (replace if necessary) (2)
(1) Service more frequently when used in DUSTY areas.
(2) These items should be serviced by your service dealer, unless you have the proper tools and are mechanically
proficient. Refer to the HONDA or ROBIN Shop Manual for service procedures.
(3) For commercial use, log hours of operation to determine proper maintenance intervals.
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MC-44S CONCRETE MIXER — MAINTENANCE (ENGINE)
DANGER :
Maintenance
Perform the scheduled maintenance procedures as defined by
Table 6 and below:
DO NOT use gasoline as a cleaning solvent,
because that would create a risk of fire or
explosion.
DAILY
■
Thoroughly remove dirt and oil from the engine and control
area.Clean or replace the air cleaner elements as necessary.
Check and retighten all fasteners as necessary. Check the
gearbox for oil leaks. Repair or replace as needed.
ENGINEAIRCLEANER
WEEKLY
1. Remove the air cleaner cover and foam filter element as
shown in Figure 25.
■
Remove the fuel filter cap and clean the inside of the fuel
tank.
2. Tap the paper filter element (Figure 34) several times on a
hard surface to remove dirt, or blow compressed air [not
exceeding 30 psi (207 kPa, 2.1 kgf/cm2)] through the filter
elementfromtheaircleanercaseside.NEVER brushoffdirt.
Brushingwillforcedirtintothefibers.Replacethepaperfilter
element if it is excessively dirty.
■
■
Remove or clean the filter at the bottom of the tank.
Remove and clean the spark plug (Figure 23), then adjust
the spark gap to 0.024 ~0.028 inch (0.6~0.7 mm).This unit
has electronic ignition, which requires no adjustments.
3. Cleanfoamelementinwarm,soapywaterornonflammable
solvent. Rinseanddrythoroughly. Diptheelementinclean
engineoilandcompletelysqueezeouttheexcessoilfromthe
element before installing.
Figure 23. Spark Plug Gap
ENGINEOIL
1. Drain the engine oil when the oil is warm as shown in
Figure 24.
2. Remove the oil drain bolt and sealing washer and allow
the oil to drain into a suitable container.
3. Replace engine oil with recommended type oil as listed
in Table 6. For engine oil capacity, see Table 2 (engine
specifications). DO NOT overfill.
4. Install drain bolt with sealing washer and tighten se-
curely.
Figure 25. Engine Air Cleaner
Figure 24. Engine Oil (Draining)
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MC-44S CONCRETE MIXER — MAINTENANCE (MIXER)
2.
Use Poleyrex EM (Exxon Mobil) or equalivant lubricant.
Clean grease fitting, apply grease gun to fitting (1/2 shot).
Remember too much grease or injecting grease too quickly
can cause premature bearing failure. Slowly apply the
recommended amount of grease, taking a miniute or so to
apply.
Ball Socket and Clamp Face Maintenance
1.
If the towing vechicle is equipped with a ball socket, smear
socket periodically with multi-purpose grease. This will keep
the ball socket well lubricated.
2.
3.
Periodically oil pivot points and clamp face surfaces of
coupler with SAE 30 WT. motor oil.
Wheel Bearings
1. After every 3 months of operation, remove the hub dust cap
When parking or storing your mixer. Keep the coupler off
the ground so dirt will not build up in the ball socket.
and inspect the wheel bearings (Figure 28).Once a year,
or when required, disassemble the wheel hubs remove
the old grease and repack the bearings forcing grease
between rollers, cone and cage with a good grade of high
speed wheel bearing grease (never use grease heavier
than 265 A.S.T.M. penetration (“No. 2.”)
Grease Fittings (Zerk) Maintenance (Mixer)
There are 3 grease (Figure 26) fittings that will require
lubrication. Lubricate these fittings once a week. Use lithium
base grease, grade N0.1.
Figure 28. Wheel Hub and Bearings
Figure 26. Grease Fittings Mixer
2.
Fill the wheel hub (Figure 28) with grease to the inside
diameter of the outer races and also fill the hub grease cap.
Reassemble the hub and mount the wheel. Then tighten
the adjusting nut, at the same time turn the wheel in both
directions, until there is a slight bind to be sure all the
bearing surfaces are in contact.
Grease Fittings (Zerk) Maintenance (Electric Motor)
1.
There are two grease (Figure 27) fittings at each end of the
electric motor that will require lubrication. Lubricate these
fittings about every 16 months.
Then back-off the adjusting nut 1/6 to 1/4 turn or to the
nearest locking hole or sufficiently to allow the wheel to
rotate freely within limits of .001" to .010" end play.Lock the
nut at this position. Install the cotter pin and dust cap, and
tighten all hardware.
Mixer Cleaning
1.
For thorough mix and longer drum life, always wash drum
out after each use.
2.
NEVER! pour or spray water over the engine or electric
motor.
Figure 27. Grease Fittings Electric Motor
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MC-44S CONCRETE MIXER — MAINTENANCE (MIXER)
Tires/Wheels/Lug Nuts
Tires and wheels are a very important and critical compo-
nents of the trailer. When specifying or replacing the trailer
wheels it is important the wheels, tires, and axle are prop-
erly matched.
CAUTION:
DO NOT attempt to repair or modify a
wheel. DO NOT install an inter-tube to
correct a leak
through the rim.
If the rim is cracked, the air
pressure in the inter-tube may
cause pieces of the rim to explode
(break-off) with great force and
can cause serious eye or bodily
injury.
Suspension
The rigid suspension and associated components (Figure
29) should be visually inspected every 6,000 miles for signs
of excessive wear, elongation of bolt holes, and loosening
of mounting bracket. Replace any damaged suspension
component immediately.
TiresWear/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.
Table 8 (Tire Wear Troubleshooting) will help pinpoint the
causes and solutions of tire wear problems.
CAUTION:
ALWAYS wear safety glasses when
removing or installing force fitted
parts. Failure to comply may result
in serious injury.
Figure 29. Suspension Components
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 27
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MC-44S CONCRETE MIXER — MAINTENANCE (MIXER)
Lug NutTorque Requirements
It is extremely important to apply and maintain proper wheel
mounting torque on the trailer. Be sure to use only the fas-
teners matched to the cone angle of the wheel. Proper pro-
cedure 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 30. DO NOT
torquethewheellugnutsallthewaydown.Tighteneachlug
nut in 3 separate passes as defined by Table 9.
3. Afterfirstroaduse,retorquealllugnutsinsequence.Check
all wheel lug nuts periodically.
NEVER! use an pneumatic air gun
to tighten wheel lug nuts.
Mixer Storage
For storage of the mixer for over 30 days, the following is
recommended:
Drain the fuel tank completely, or add STA-BIL to the
fuel.
Run the engine until the fuel is completely consumed.
Completely drain used oil from the engine crankcase
and fill with fresh clean oil, then follow the procedures
described in the engine manual for engine storage.
Clean the entire mixer and engine compartment.
Place the mixing drum in the down position (mouth facing
downward).
Cover the mixer and place it a clean dry area, that is
protected from harsh elements.
Figure 30. Wheel Lug Nuts Tightening Sequence
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NOTE PAGE
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MC-44S CONCRETE MIXER — TROUBLESHOOTING (ENGINE)
diagnosis based on the Troubleshooting (Tables 9 and 10)
information shown below and on the next page. If the problem
cannot be remedied, please leave the unit just as it is and
consult our company's business office or service plant.
Practically all breakdowns can be prevented by proper
handling and maintenance inspections, but in the event of a
breakdown, please take a remedial action following the
TABLE 9. ENGINE TROUBLESHOOTING
SYMPTOM
Difficult to start
POSSIBLE PROBLEM
SOLUTION
Ignition plug being bridge?
Carbon deposit at ignition?
Check ignition system.
Clean or replace ignition.
Replace insulators.
Fuel is available but spark plug
will not ignite. (Power available
at high tension cable).
Short circuit due to defective
insulators?
Improper spark gap?
Set spark plug gap to the correct gap.
Check stop switch circuit. Replace stop switch if defective.
Replace ignition coil.
Short circuit at stop switch?
Ignition coil defective?
Fuel is available but spark plug
will not ignite. (Power NOT
available at high tension cable).
Muffler clogged with carbon
deposits?
Clean or replace muffler.
Fuel is available and spark plug
ignites (compression normal).
Fuel in use inadequate (water,
dust)?
Flush fuel sytem and replace with fresh fuel.
Air Cleaner clogged?
Defective cylinder head gasket?
Cylinder worn?
Clean or replace air cleaner.
Tighten cylinder head bolts or replace head gasket.
Replace cylinder.
Fuel is available and spark plug
ignites (compression low ).
Spark plug loose?
Tighen spark plug.
Operation not satisfactory
Air cleaner clogged?
Air in fuel line?
Bleed (remove air) from fuel line.
Adjust carbureator float
Not enough power available
(compression normal, no miss-
firing).
Fuel level in carbureator float
chamber improper?
Carbon deposits in cylinder?
Ignition coil defective?
Clean or replace cylinder
Flush fuel sytem and replace with fresh fuel.
Replace ignition wires, clean ignition.
Flush fuel sytem and replace with fresh fuel.
Not enough power available
(compression normal, miss-
firing).
Ignition plug often shorts?
Fuel in use inadequate (water,
dust)?
Excessive carbon depostion in
combustion chamber?
Clean or replace crankcase.
Clean or replace muffler.
Engine overheats.
Exhaust or muffler clogged with
carbon.
Spark plug heat value incorrect? Replace spark plug with correct type spark plug.
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MC-44S CONCRETE MIXER — TROUBLESHOOTING (ENGINE/MIXER)
TABLE 9. ENGINE TROUBLESHOOTING (Continued)
SYMPTOM
POSSIBLE PROBLEM
SOLUTION
Operation not satisfactory
Governor adjustment improper?
Governor spring defective?
Fuel flow erratic?
Adjust governor to correct lever.
Clean or replace ignition.
Check fuel line.
Rotational speed fluctuates.
Air taken in through suction
line?
Check suction line.
Dust in rotating part?
Spring spring failure?
Clean recoil starter assembly.
Replace sprial spring.
Recoil starter not working
properly.
TABLE 10. MIXER TROUBLESHOOTING
SYMPTOM
POSSIBLE PROBLEM
SOLUTION
Check that the ring gear and bearings are not worn . Replace as
necessary.
Defective ring gear?
Check that the pinion gear and bearings are not worn . Replace as
necessary.
Defective pinion gear?
Drum rotates rough.
Worn V-belt?
Loose pulley?
Replace V-belt.
Tighten or replace pulley.
Incorrect or no voltage being
supplied to electric motor?
Check that the electric motor has the correct supply voltage.
Inspect power source and extension cord. Push reset button on
electric motor. Make sure correct voltage is being supplied to motor.
Power to electric motor?
Fuel?
Check level of fuel in fuel tank. Add fuel if necessary. Make sure
fuel is being supplied to the engine. Check to ensure that the fuel
filter is not clogged.
Drum does not rotate at all.
Broken V-belt?
Replace V-belt.
Check that the gears and bearings are not broken. Replace as
necessary.
Defective ring or pinion gears?
Defective electric motor?
Replace electric motor.
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 31
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EXPLANATION OF CODE IN REMARKS COLUMN
The following section explains the different symbols and
QTY. Column
remarks used in the Parts section of this manual. Use the
help numbers found on the back page of the manual if there
are any questions.
Numbers Used — Item quantity can be indicated by a
number, a blank entry, or A/R.
A/R (As Required) is generally used for hoses or other
parts that are sold in bulk and cut to length.
NOTICE
The contents and part numbers listed in the parts
section are subject to change without notice.Multiquip
does not guarantee the availability of the parts listed.
A blank entry generally indicates that the item is not sold
separately.Other entries will be clarified in the“Remarks”
Column.
SAMPLE PARTS LIST
REMARKS Column
NO. PART NO. PART NAME
QTY. REMARKS
Some of the most common notes found in the “Remarks”
Column are listed below. Other additional notes needed
to describe the item can also be shown.
1
2%
12345
BOLT......................1 .....INCLUDES ITEMS W/%
WASHER, 1/4 IN............NOT SOLD SEPARATELY
WASHER, 3/8 IN....1 .....MQ-45T ONLY
2% 12347
3
4
12348
12349
HOSE ..................A/R ...MAKE LOCALLY
BEARING ..............1 .....S/N 2345B AND ABOVE
Assembly/Kit — All items on the parts list with the
same unique symbol will be included when this item is
purchased.
NO. Column
Indicated by:
Unique Symbols — All items with same unique
symbol
“INCLUDES ITEMS W/(unique symbol)”
(@, #, +, %, or >) in the number column belong to the
same assembly or kit, which is indicated by a note in the
“Remarks” column.
Serial Number Break — Used to list an effective serial
number range where a particular part is used.
Indicated by:
Duplicate Item Numbers — Duplicate numbers indicate
multiple part numbers, which are in effect for the same
general item, such as different size saw blade guards in
use or a part that has been updated on newer versions
of the same machine.
“S/N XXXXX AND BELOW”
“S/N XXXX AND ABOVE”
“S/N XXXX TO S/N XXX”
Specific Model Number Use — Indicates that the part
is used only with the specific model number or model
number variant listed. It can also be used to show a
part is NOT used on a specific model or model number
variant.
NOTICE
When ordering a part that has more than one item
number listed, check the remarks column for help in
determining the proper part to order.
Indicated by:
“XXXXX ONLY”
“NOT USED ON XXXX”
PART NO. Column
Numbers Used — Part numbers can be indicated by a
number, a blank entry, or TBD.
“Make/Obtain Locally” — Indicates that the part can
be purchased at any hardware shop or made out of
available items.Examples include battery cables, shims,
and certain washers and nuts.
TBD (To Be Determined) is generally used to show a
part that has not been assigned a formal part number
at the time of publication.
“Not Sold Separately”— Indicates that an item cannot
be purchased as a separate item and is either part of an
assembly/kit that can be purchased, or is not available
for sale through Multiquip.
A blank entry generally indicates that the item is not sold
separately or is not sold by Multiquip. Other entries will
be clarified in the “Remarks” Column.
PAGE 32 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S CONCRETE MIXER — SUGGESTED SPARE PARTS
MC-44S CONCRETE MIXER 1TO 4 UNITSWITH
HONDA GX120K1QX2 ENGINE
Qty. P/N
Description
2 ....... 507725 ................ V-BELT w/GAS ENGINE
1 ....... 29173-001 ........... STOP BUTTON w/GAS ENGINE
2 ....... 491010 ................ LATCH SET
1 ....... 500904 ................ EXPANSION PLUG
2 ....... EM903017 ........... SPINDLE BEARING CUP
2 ....... EM903054 ........... SPINDLE BEARING CONES
1 ....... EM505472 ........... SPACER, DRUM
2 ....... 041006204 .......... BEARING, JACKSHAFT
2 ....... EM914288 ........... SEAL, AXLE
2 ....... EM903012 ........... BEARING CUP
2 ....... EM903113 ........... BEARING CONE
2 ....... 3469 .................... DUST CAP, AXLE
4 ....... 17210ZE0505 ...... ELEMENT, AIR CLEANER
4 ....... 9807955846......... SPARK PLUG
1 ....... 17620ZH7023...... CAP, FUEL TANK
1 ....... 28462ZH8003...... ROPE, RECOIL STARTER
Part numbers on this Suggested
Spare Parts List may supercede/
replace the P/N's shown in the
test pages of this manual.
NOTE
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 33
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MC-44S CONCRETE MIXER — NAME PLATE AND DECALS
NAME PLATE AND DECALS
PAGE 34 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S CONCRETE MIXER— NAME PLATE AND DECALS
NAME PLATE AND DECALS
NO
1
2
3
4
5
6
7
PART NO
512910
CIPDCL160
504713
EM948630
DCL151
35137
PART NAME
MQ MULTIQUIP LOGO
QTY.
REMARKS
3
2
1
1
1
1
1
DECAL, CRUSHWARNING
DECAL, SAFETY INSTRUCTIONS
DECAL, EMERGENCY STOP
DECAL, TOWING INSTRUCTIONS
DECAL, READ
13118
DECAL, POWDER COATED
8
NAMEPLATE........................................................ 1 ......... CONTACT MQ PARTS DEPT.
SEE OPERATION AND SAFETY DECALS PAGE.
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 35
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MC-44S — STEEL BARREL ASSY.
STEEL BARREL ASSY.
PAGE 36 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S — STEEL BARREL ASSY.
STEEL BARREL ASSY.
NO
1
2
PART NO
500904
501867
PART NAME
CAP
KING PIN
QTY.
1
1
REMARK
3
4
5
6
7
8
8
8
EM903054
EM903017
504096
EM963610
501061
511732
511731
511730
EM969013
490952
502019
493296
EM963692
492584
514672
491008
EM916001
500214
501917
492467
EM505472
492483
500601
SPINDLE BEARING 5/8" CONE ............ 2 ............. REPLACES 492154
SPINDLE BEARING CUP ...................... 2 ............. REPLACES 492233
RING GEAR
1
6
1
AR
AR
AR
5
BOLT 3/8" NC 1-1/4" G5
BARREL, STEEL 4 CU. FT.
SHIM 0.25 THICK
SHIM .187 THICK
SHIM .140 THICK
9
NUT, LOCK 3/8” NC
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
RING, RETENTION
2
1
2
2
2
1
3
DRIVE PINION SHAFT
PINION SHAFT BEARING
BOLT 1/2" NC X 1-1/2" G5
LOCKNUT, HEX 1/2" NC
HOUSING JACKSHAFT
CAP, GREASE FITTING
GREASE FITTING 1/8" NPT ................. 3.............. REPLACES 491698
SQUARE KEY 1/4" X 30 MM
DRIVE PINION
ALLEN SCREW 5/16 NC 3/8"
SPACER, BARREL
SET SCREW 3/8" X 1- 1/4" NC
1
1
1
1
1
NUT, HEX LOWER 1" ............................ 1 ............. REPLACES 492579
492406
492584
510736
491685
500601
501269
BOLT 5/8" NC X 1-1/2" NC
LOCKNUT, HEX 1/2" NC
YOKE
COTTER PIN 3/32" X 2"
CASTLE NUT 1"
SPACER
2
2
1
1
1
1
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 37
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MC-44S — MAIN FRAME ASSY.
MAIN FRAME ASSY.
PAGE 38 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S — MAIN FRAME ASSY.
MAIN FRAME ASSY.
NO
1
2
PART NO
501844
2101402
PART NAME
GUARD, GEAR WHEEL
WASHER, LOCK 1/4"
QTY.
1
4
REMARK
3
4
5
6
7
8
492284
502017
EM969013
490896
EM963610
491008
ROUND HEAD BOLT 1/4" NC 3/8 G2" ......... 4.............. REPLACES 492279
DUMP GEAR
1
1
1
1
2
NUT, LOCK 3/8" NC
DUMP LATCH
BOLT 3/8" NC X 1-1/2" G5
GREASE CAP
9
EM916001
EM963055
3103160
495595
514643
10176
EM124
500596
501902
GREASE FITTING 1/8" NPT ........................ 2.............. REPLACES 491698
10
11
12
13
14
15
16
17
18
19
19
19A
20
ALLEN BOLT 3/16" NS X 5/8"
WASHER, LOCK 3/16"
WASHER, FLAT 3/16"
FRAME
4
4
4
1
LOCK NUT 1/2 NC........................................ 1.............. REPLACES 492586
BOLT 1/2"- 13 X 4 G5
HANDWHEEL SHAFT
HANDWHEEL
1
1
1
1
SAFETY CHAIN
*
01004
01004
516580
490958
13363KIT
HBC-1
HLC-1
CONNECTOR LINK ...................................... 2 .............. BEFORE JANUARY 2006
CONNECTOR LINK ...................................... 1 .............. AFTER JANUARY 2006
CLEVIS SAFETY HOOK, 1/4" ..................... 1 .............. AFTER JANUARY 2006
*
*
*
RING RETAINING
1
21
22
23
24
CHAIN LINK KIT........................................... 1 .............. INCLUDES ITEMS W/
*
BALL HITCH 2-INCH .................................... 1.............. CONTACT UNIT SALES
LOOP HITCH ................................................ 1.............. CONTACT UNIT SALES
PIN HITCH 1-INCH ....................................... 1.............. CONTACT UNIT SALES
HPC-1
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 39
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MC-44S — AXLE ASSY.
AXLE ASSY.
PAGE 40 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S — AXLE ASSY.
AXLE ASSY.
NO
1
PART NO
PART NAME
QTY.
REMARK
492584
492394
EM914288
EM903113
EM903012
EM941306
EM511159
EM501299
491688
8164
LOCK NUT 1/2" NC
BOLT 1/2" NC 1-1/2" G5
OIL SEAL
8
8
2
4
4
2
3
4#
#
#
*
BEARING CONE
BEARING CUP
5
6
7
8
9
HUB ASSY., 4-BOLT (1-1/16" SPINDLE) ........................ 2 ........... INCLUDES ITEMS W/
#
WASHER, FLAT, .087" THICKNESS
WASHER, FLAT, .135" THICKNESS
COTTER PIN 1/8" X 1-1/2'
NUT, SLOTTED HEX JAM 1"- 20
TIRE AND RIM, CARLISE .............................................. 2 ........... BEFORE JANUARY 2006
TIRE AND RIME, TOWMASTER II ................................. 2 ........... AFTER JANUARY 2006
LUG NUTS
DUST CAP
AXLE, RIGID
WASHER, FLAT
2
AR
2
10
11
11
12
13
14
15
2
3005
516476
8115
3469
514679
492600
#
#
8
2
1
12
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 41
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MC-44S — CABINET ASSY.
CABINET ASSY.
PAGE 42 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S — CABINET ASSY.
CABINET ASSY.
NO
1
2
PART NO
490202
514771
PART NAME
QTY.
REMARKS
RUBBER PROTECTOR
4
ENGINE HOUSING CABINET W/DECALS ...........1................INCLUDES ITEM W//
*
REPLACES P/N 514648
3
4
5
6
7
492375
EM923023
13287
2203
1307
BOLT 3/8" NC X 1" G5
WASHER, FLAT 5/16"
6
8
LOCK NUT 8-32 ....................................................6................REPLACEMENT PART ONLY
WASHER, FLAT #10 .............................................6................REPLACEMENT PART ONLY
RHMS 8-32 X 1/2" .................................................6................REPLACEMENT PART ONLY
8/
*
9
10
11
491010
492598
2105164
EM974007
LATCH ASSY., COMPLETE
WASHER, FLAT 3/8"
NUT 3/8" NC G5
2
12
6
PAINT, SPRAY CAN 12 OZ. TRAFFIC RED
AR
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 43
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MC-44S — GAS ENGINE MOUNTING PLATE ASSY.
GAS ENGINE MOUNTING PLATE ASSY.
PAGE 44 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S — GAS ENGINE MOUNTING PLATE ASSY.
GAS ENGINE MOUNTING PLATE ASSY.
NO
1
2
3
4
5
6
PART NO
GX120K1QX2
490956
500246
EM961045
492066
PART NAME
ENGINE, HONDA 3.9 HP
RING, RETAINING
SQUARE KEY 1/4 X 35 MM
SET SCREW 5/16" NC X 3/4"
UPPER PULLEY
QTY.
REMARKS
1
1
1
1
1
1
501019
SQUARE KEY 3/16" X 45 MM
7
7
8
9
507725
EM507846
492467
V-BELT A-48 ................................................ 1 ........... USED UP TO JUNE 2005
V-BELT A-50 ................................................ 1 ........... USED STARTING JULY 2005
ALLEN SCREW 5/16" NC X 3/8"
DRIVE PULLEY 4.0 HP
WASHER, LOCK 5/16"
WASHER, FLAT 5/16"
NUT, HEX 5/16 X18 NC G5
BASE PLATE, ENGINE
WASHER, FLAT 1/2"
1
1
4
4
4
1
8
4
1
1
1
4
4
1
492065
10
11
12
13
14
15
16
17
18
19
20
21
EM923343
EM923023
2105164
514670
492600
EM963692
29174-001
29173-001
510573C
492584
492367
514684
BOLT, HEX 1/2" NC 1-1/2" G5
BUTTON, STOP
SWITCH, STOP
ENGINE CABLE HARNESS
LOCKNUT 1/2"
BOLT 5/16" X 1-3/4" G5
SUPPORT BRACKET
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 45
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MC-44S — ELECTRIC MOTOR MOUNTING PLATE ASSY.
ELECTRIC MOTOR MOUNTING PLATE ASSY.
PAGE 46 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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MC-44S — ELECTRIC MOTOR MOUNTING PLATE ASSY.
ELECTRIC MOTOR MOUNTING PLATE ASSY.
NO
1
2
3
4
5
6
PART NO
34F3245596
490956
500246
EM961045
492066
501019
PART NAME
MOTOR, ELECTRIC .5 HP
RING, RETAINING
SQUARE KEY 3/16" X 45 MM
SET SCREW 5/16" NC X 3/4"
UPPER PULLEY
QTY.
REMARKS
1
1
1
1
1
1
SQUARE KEY 3/16" X 45 MM
7
7
507725
EM507846
V-BELT A-48 ................................................ 1 ........... USED UP TO JUNE 2005
V-BELT A-50 ................................................ 1 ........... USED STARTING JULY 2005
8
9
492467
492067
EM923343
EM923023
492553
502041
492600
EM963692
4922584
492367
ALLEN SCREW 5/16" NC X 1/2"
DRIVE PULLEY
WASHER, LOCK 5/16"
WASHER, FLAT 5/16"
NUT, HEX 5/16 X18 NC G5
BASE PLATE ENGINE
WASHER, FLAT 1/2"
BOLT, HEX 1/2" NC 1-1/2" G5
LOCKNUT 1/2"
BOLT 5/16" X 1-3/4"
SUPPORT BRACKET
1
1
4
4
4
1
8
4
4
4
1
10
11
12
13
14
15
16
17
18
514684
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 47
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HONDA GX120K1QX2 ENGINE — AIR CLEANER ASSY.
AIR CLEANER ASSY.
PAGE 48 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — AIR CLEANER ASSY.
AIR CLEANER ASSY.
NO.
1
2
3
*
4
PART NO.
PART NAME
QTY.
REMARKS
16271ZE1000
17210ZE0505
17218ZE0505
17230ZE0820
17232891000
17238ZE0010
17239ZE1000
17410ZE0030
90325044000
957010602000
9405006000
GASKET, ELBOW
1
ELEMENT, AIR CLEANER (DUAL) ................... 1.............INCLUDES ITEMS W/
FILTER, OUTER
COVER, AIR CLEANER (DUAL)
GROMMET, AIR CLEANER
COLLAR, AIR CLEANER
COLLAR B, AIR CLEANER
ELBOW, AIR CLEANER ................................... 1.............INCLUDES ITEMS W/
WINGNUT, TOOL BOX SETTING
BOLT, FLANGE 6X20
NUT, FLANGE 6MM
*
1
1
1
2
1
5
*
7
8
9
#
#
#
12
13
14
2
1
2
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 49
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HONDA GX120K1QX2 ENGINE — CAMSHAFT ASSY.
CAMSHAFT ASSY.
PAGE 50 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — CAMSHAFT ASSY.
CAMSHAFT ASSY.
NO.
1
2
3
4
PART NO.
PART NAME
QTY.
REMARKS
14100ZE0812
14410ZE0010
14431ZE1000
14441ZE1010
14451ZE1013
14568ZE1000
14711ZF0010
14721ZF0000
14751ZF1000
14771ZE1000
14773ZE1000
14781ZE1000
14791ZE0010
90012ZE0010
90206ZE1000
CAMSHAFT ASSEMBLY.................................. 1.............INCLUDES ITEMS W/
*
ROD, PUSH
ARM, VALVE ROCKER
LIFTER, VALVE
PIVOT, ROCKER ARM
SPRING, WEIGHT RETURN
VALVE, IN.
2
2
2
2
1
1
1
2
1
1
1
1
2
2
5
6
*
7
8
VALVE, EX.
SPRING, VALVE
9
10
11
12
13
14
15
RETAINER, IN. VALVE SPRING
RETAINER, EX. VALVE SPRING
ROTATOR, VALVE
PLATE, PUSH ROD GUIDE
BOLT, PIVOT 8MM
NUT, PIVOT ADJ.
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 51
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HONDA GX120K1QX2 ENGINE — CARBURETOR ASSY.
CARBURETOR ASSY.
PAGE 52 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — CARBURETOR ASSY.
CARBURETOR ASSY.
NO.
PART NO.
PART NAME
QTY.
REMARKS
1
*
2
*
3
*
4
*
5
*
6
*
7
*
8
*
9
16010ZE1812
16011ZE0005
16013ZE0005
16015ZE1811
16016ZH7W01
16024ZE1811
16028ZE0005
16044ZE0005
16100ZH7W51
16124ZE0005
16166ZH7W50
16173001004
16211ZE0000
16212ZH7800
16220ZE1020
16221ZH8801
16610ZE1000
16953ZE1812
16954ZE1811
16956ZE1811
16957ZE1812
16967ZE0811
93500030080G
9430520122
GASKET SET
1
1
1
1
1
1
1
1
VALVE SET, FLOAT
FLOAT SET
CHAMBER SET, FLOAT
SCREW SET
SCREW SET, DRAIN
SCREW SET B
CHOKE SET
CARBURETOR ASSEMBLY, BE60B B............. 1.............INCLUDES ITEMS W/
SCREW, THROTTLE STOP
NOZZLE, MAIN
GASKET, FUEL STRAINER CUP
INSULATOR, CARBURETOR
GASKET, INSULATOR
SPACER, CARBURETOR
GASKET, CARBURETOR
LEVER, CHOKE (STANDARD) ......................... 1.............INCLUDES ITEMS W/
LEVER,VALVE
PLATE, LEVER SETTING
SPRING, VALVE LEVER
GASKET, VALVE
CUP, FUEL STRAINER
SCREW, PAN (3 X 6)
PIN, SPRING (2 X 12)
JET, MAIN (#55) (OPTIONAL)
JET, MAIN (#58) (OPTIONAL)
JET, MAIN (#60)
*
10
1
1
1
1
1
1
1
*
11
*
12
*
13
14
15
16
17
#
18
1
1
1
1
1
2
1
1
1
1
1
*
19
*
20
*
21
*
22
*
23
*
24
25
25
25
26
#
99101ZH80550
99101ZH80580
99101ZH80600
99204ZE00350
*
*
JET, SET, PILOT (#35)
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 53
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HONDA GX120K1QX2 ENGINE — CONTROL ASSY.
CONTROL ASSY.
PAGE 54 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — CONTROL ASSY.
CONTROL ASSY.
NO.
3
4
5
6
PART NO.
PART NAME
QTY.
REMARKS
16500ZH7820
16551ZE0010
16555ZE0000
16561ZE0020
16562ZE0020
16571ZH7000
16574ZE1000
16575ZH8000
16576891000
16578ZE1000
16580ZH7810
16584883300
16592ZE1810
90013883000
90015ZE5010
90022888010
90114SA0000
93500050250H
93500050160A
9405006000
CONTROL ASSEMBLY (REMOTE) ........... 1 ............ INCLUDES ITEMS W/
#
ARM, GOVERNOR
ROD, GOVERNOR
SPRING, GOVERNOR
SPRING, THROTTLE RETURN
LEVER, CONTROL
SPRING, LEVER
WASHER, CONTROL LEVER
HOLDER, CABLE
SPACER, CONTROL LEVER
BASE CONTROL
SPRING, CONTROL ADJUSTING
SPRING, CABLE RETURN
BOLT, FLANGE 6X12 (CT200)
BOLT, GOVERNOR ARM
BOLT, FLANGE 6X20 (CT200)
NUT, SELF- LOCK 6MM
SCREW, PAN 5X25
1
1
1
1
1
1
1
7
8#
#
9
10
11
12
14
15
16
18
19
20
21
24
25
26
#
#
#
#
#
#
1
1
1
1
1
1
1
1
1
1
#
#
#
SCREW, PAN
NUT, FLANGE 6MM
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 55
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HONDA GX120K1QX2 ENGINE — CRANKCASE COVER ASSY.
CRANKCASE COVER ASSY.
PAGE 56 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — CRANKCASE COVER ASSY.
CRANKCASE COVER ASSY.
NO.
1
2
PART NO.
PART NAME
QTY.
REMARKS
11300ZE0640
11381ZH7800
15600ZE1003
15600ZG4003
15625ZE1003
15625ZE1003
90015883000
91001878003
91203ZE0003
9430108140
COVER ASSEMBLY, CRANKCASE (W- TYPE)....... 1 ..............INCLUDES ITEMS W/
*
#
GASKET, CASE COVER
CAP ASSEMBLY, OIL FILLER ................................ 1 ..............INCLUDES ITEMS W/
CAP ASSEMBLY, OIL FILLER ................................ 1 ..............INCLUDES ITEMS W/+
GASKET, OIL FILLER CAP
GASKET, OIL FILLER CAP
BOLT, FLANGE 6X28
BEARING, RADIAL BALL
OIL SEAL 22X41X6
1
3
4
7#
1
1
7
1
1
2
8+
9
10
*
11
12
*
PIN A, DOWEL 8X14
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 57
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HONDA GX120K1QX2 ENGINE — CRANKSHAFT ASSY.
CRANKSHAFT ASSY.
PAGE 58 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — CRANKSHAFT ASSY.
CRANKSHAFT ASSY.
NO.
1
2
PART NO.
13310ZE0601
90745ZE1600
PART NAME
CRANKSHAFT, H-TYPE
KEY 4.78 X4.78X38
QTY.
1
1
REMARKS
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 59
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HONDA GX120K1QX2 ENGINE — CYLINDER BARREL ASSY.
CYLINDER BARREL ASSY.
PAGE 60 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — CYLINDER BARREL ASSY.
CYLINDER BARREL ASSY.
NO.
2
3
PART NO.
PART NAME
QTY.
REMARKS
120A0ZH7810
15510ZE1033
16510ZE1000
16511ZE1000
16512ZE1000
16513ZE1000
16531ZE1000
16541ZE1000
90131ZE1000
90451ZE1000
90601ZE1000
90602ZE1000
91001878003
91202ZE6003
91353671003
9405010000
CYLINDER ASSEMBLY (OIL ALERT) ........1 ............ INCLUDES ITEMS W/
*
#
SWITCH ASSEMBLY, OIL LEVEL
GOVERNOR ASSEMBLLY .........................1 ............ INCLUDES ITEMS W/
WEIGHT, GOVERNOR
HOLDER, GOVERNORWEIGHT
PIN, GOVERNOR WEIGHT
SLIDER, GOVERNOR
1
4
5#
6#
7#
8
9
2
1
2
1
1
2
1
2
1
1
1
1
1
2
1
2
SHAFT, GOVERNOR ARM
BOLT, DRAIN PLUG
10
11
12
13
14
15
16
17
18
19
20
WASHER, THRUST 6mm
WASHER, DRAIN PLUG 10.2mm
CLIP, GOVERNOR HOLDER
BEARING, RADIAL BALL 62/22
OIL SEAL 22X35X6
O- RING 13.5X1.5 (ARAI)
NUT, FLANGE 10mm
WASHER, PLAIN 6mm
PIN, LOCK 8mm
BOLT, FLANGE 6X12
*
*
9410106800
9425108000
957010601200
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 61
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HONDA GX120K1QX2 ENGINE — CYLINDER HEAD ASSY.
CYLINDER HEAD ASSY.
PAGE 62 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — CYLINDER HEAD ASSY.
CYLINDER HEAD ASSY.
NO.
PART NO.
PART NAME
QTY.
REMARKS
1
12210ZH7000
12204ZE1306
12205ZE1315
12216ZE5300
12251ZH7800
12310ZE1020
12391ZE1000
15721ZH8000
90013883000
90043ZE1020
90047ZE1000
9430110160
CYLINDER HEAD ..................................................1.............. INCLUDES ITEMS W/
*
2
GUIDE, VALVE (OS) OPTIONAL
GUIDE, EX. VALVE (OS) OPTIONAL ...................1.............. INCLUDES ITEMS W/+
CLIP, VALVE GUIDE
GASKET, CYLINDER HEAD
COVER, HEAD
GASKET, CYLINDER HEAD COVER
TUBE, BREATHER
BOLT, FLANGE 6X12 (CT200)
BOLT, STUD 6X109
BOLT, STUD 8X32
1
*
3
*
4 +
1
1
1
1
1
4
2
2
2
4
1
*
5
6
7
8
9
10
11
12
14
15
PIN, A, DOWEL 10X16
BOLT, FLANGE 8X55
SPARK PLUG BPR6ES (NGK)
957230805500
9807955846
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 63
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HONDA GX120K1QX2 ENGINE — FAN COVER ASSY.
FAN COVER ASSY.
PAGE 64 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — FAN COVER ASSY.
FAN COVER ASSY.
NO.
1
2
3
4
5
6
7
8
PART NO.
PART NAME
QTY.
REMARKS
11347371300
19610ZE0000ZE
19611ZH7810
90601ZH7013
19630ZH7000
32197ZH8003
36100ZE1015
36101ZE1010
90013883000
90022888010
34150ZH7003
957010600800
GROMMET, ADJUSTING COVER
COVER, FAN *NH1* BLACK
PLATE, SIDE (OIL ALERT)
CLIP, HARNESS
1
1
1
1
1
1
1
1
6
1
1
1
SHROUD
SUB- HARNESS
SWITCH ASSEMBLY, ENGINE STOP
WIRE, STOP SWITCH 370MM
BOLT, FLANGE 6X12 (CT200)
BOLT, FLANGE 6X12 (CT200)
ALERT UNIT, OIL
9
10
11
13
BOLT, FLANGE 6X8
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 65
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HONDA GX120K1QX2 ENGINE — FLYWHEEL ASSY.
FLYWHEEL ASSY.
PAGE 66 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — FLYWHEEL ASSY.
FLYWHEEL ASSY.
NO.
1
2
4
5
PART NO.
PART NAME
KEY, SPECIAL WOODRUFF 25X18
FAN, COOLING
PULLEY, STARTER
FLYWHEEL
NUT, SPECIAL 14MM
QTY.
REMARKS
13331357000
19511ZE0000
28451ZH8003
31100ZE0010
90201878003
1
1
1
1
1
7
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 67
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HONDA GX120K1QX2 ENGINE — FUELTANK ASSY.
FUEL TANK ASSY.
PAGE 68 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — FUELTANK ASSY.
FUEL TANK ASSY.
NO.
1
2
3
5
PART NO.
PART NAME
RUBBER, SUPPORTER 107MM
JOINT, FUEL TANK
TANK, FUEL *NH1* (BLACK)
CAP, FUEL FILLER ..................................... 1 .......... INCLUDES ITEMS W/
GASKET, FUEL FILLER CAP
O- RING 13.5X1.5 (ARAI)
NUT, FLANGE 6MM
BULK HOSE, FUEL (4.5X3000) (4.5X140)
CLIP, TUBE (B8)
QTY.
REMARKS
16854ZH8000
16955ZE1000
17510ZE0020ZD
17620ZH7023
17631ZH7003
91353671003
9405006000
1
1
1
*
6
11
1
1
2
1
2
1
*
12
13
14
15
950014500360M
9500202080
90004ZH7003
BOLT, FLANGE 6X29
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 69
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HONDA GX120K1QX2 ENGINE — IGNITION COIL ASSY.
IGNITION COIL ASSY.
PAGE 70 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — IGNITION COIL ASSY.
IGNITION COIL ASSY.
NO.
1
2
PART NO.
PART NAME
QTY.
REMARKS
30500ZE1033
30700ZE1013
90121952000
COIL ASSEMBLY, IGNITION
CAP ASSEMBLY, NOISE SUPPRESSOR
BOLT, FLANGE 6X25
1
1
2
8
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 71
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HONDA GX120K1QX2 ENGINE — MUFFLER ASSY.
MUFFLER ASSY.
PAGE 72 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — MUFFLER ASSY.
MUFFLER ASSY.
NO.
1
3
7
10
PART NO.
PART NAME
QTY.
REMARKS
18310ZF1000
18320ZF1H01
18381ZH8800
90050ZE1000
94001080000S
MUFFLER
1
1
1
4
2
PROTECTOR, MUFFLER
GASKET, MUFFLER
SCREW, TAPPING 5X8
NUT, HEX. 8MM
13
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 73
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HONDA GX120K1QX2 ENGINE — PISTON ASSY.
PISTON ASSY.
PAGE 74 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — PISTON ASSY.
PISTON ASSY.
NO.
1
1
1
1
2
2
2
2
3
4
4
5
*
6
PART NO.
PART NAME
QTY. REMARKS
13010ZK7V01
13011ZE6013
13012ZK7V01
13013ZK7V01
13101ZH7000
13102ZH7000
13103ZH7000
13104ZH7000
13111ZE0000
132A0ZE0000
13200ZE0000
90001ZE1000
90551ZE0000
RING SET, PISTON (STANDARD)
RING SET, PISTON (OS 0.25), OPTIONAL
RING SET, PISTON (OS 0.50) , OPTIONAL
RING SET, PISTON (OS 0.75), OPTIONAL
PISTON, STANDARD
1
1
1
1
1
1
1
1
1
PISTON, OS 0.25
PISTON, OS 0.50
PISTON, 0.75
PIN, PISTON
ROD ASSY, CONNECTING (UNDER SIZE) .... 1 ...... INCLUDES ITEMS W/
ROD ASSEMBLY, CONNECTING.................... 1 ...... INCLUDES ITEMS W/
BOLT, CONNECTING ROD
CLIP, PISTON PIN 13MM
*
*
2
2
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 75
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HONDA GX120K1QX2 ENGINE — RECOIL STARTER ASSY.
RECOIL STARTER ASSY.
PAGE 76 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — RECOIL STARTER ASSY.
RECOIL STARTER ASSY.
NO.
PART NO.
PART NAME
QTY.
REMARKS
1
28400ZH8013ZB
28410ZH8003ZB
28420ZH8013
28422ZH8013
28433ZH8003
28441ZH8003
28442ZH8003
28443ZH8003
28461ZH8003
28462ZH8003
90003ZH8003
9008ZE2003
STARTER ASSY., RECOIL *NH1* (BLACK) ..........1.............. INCLUDES ITEMS W/
*
2
CASE, RECOIL STARTER *NH1* (BLACK)
REEL, RECOIL STARTER
RATCHET, STARTER
GUIDE, RATCHET
SPRING, FRICTION
SPRING, RECOIL STARTER
SPRING, RETURN
KNOB, RECOIL STARTER
ROPE, RECOIL STARTER
SCREW, SETTING
1
1
2
1
1
1
2
1
1
1
3
*
3
*
4
*
5
*
6
*
7
*
8
*
9
*
10
*
11
*
12
BOLT, FLANGE 6X10
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 77
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HONDA GX120K1QX2 ENGINE — GASKET KIT ASSY.
NO ARTWORK AVALIBLE
PAGE 78 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — GASKET KIT ASSY.
GASKET KIT ASSY.
NO.
PART NO.
PART NAME
QTY.
REMARKS
2
06111ZH7405
11381ZH7800
12251ZH7800
12391ZE1000
16212ZH7800
16221ZH8801
18381ZH8800
GASKET KIT ......................................................... 1.............. INCLUDES ITEMS W/
*
3
*
4
*
5
*
6
*
7
*
8
*
GASKET, CASE COVER
GASKET, CYLINDER HEAD
GASKET, CYLINDER HEAD COVER
GASKET, INSULATOR
GASKET, CARBURETOR
GASKET, MUFFLER
1
1
1
1
1
1
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 79
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HONDA GX120K1QX2 ENGINE — LABELS ASSY.
LABELS ASSY.
PAGE 80 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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HONDA GX120K1QX2 ENGINE — LABELS ASSY.
LABELS ASSY.
NO.
1
3
4
6
PART NO.
PART NAME
RING SET, PISTON (STANDARD)
LABEL CAUTION
MARK CHOKE
MARK, OIL ALERT
QTY. REMARKS
87521ZH7020
87522zH9000
87528ZE1810
87532ZH8810
1
1
1
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 81
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TERMS AND CONDITIONS OF SALE — PARTS
5. Parts must be in new and resalable
condition, in the original Multiquip
package (if any), and with Multiquip part
numbers clearly marked.
Multiquip reserves the right to quote and
sell direct to Government agencies, and to
Original Equipment Manufacturer accounts
who use our products as integral parts of their
own products.
PAYMENT TERMS
Terms of payment for parts are net 30 days.
FREIGHT POLICY
6. The following items are not returnable:
All parts orders will be shipped collect or
prepaid with the charges added to the invoice.
All shipments are F.O.B. point of origin.
Multiquip’s responsibility ceases when a
signed manifest has been obtained from the
carrier, and any claim for shortage or damage
must be settled between the consignee and
the carrier.
a. Obsolete parts. (If an item is in the
price book and shows as being
replaced by another item, it is
obsolete.)
SPECIAL EXPEDITING SERVICE
A $35.00 surcharge will be added to the
invoice for special handling including bus
shipments, insured parcel post or in cases
where Multiquip must personally deliver the
parts to the carrier.
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
prior to the return date.
LIMITATIONS OF SELLER’S LIABILITY
MINIMUM ORDER
Multiquip shall not be liable hereunder for
damages in excess of the purchase price of
the item with respect to which damages are
claimed, and in no event shall Multiquip be
liable for loss of profit or good will or for any
other special, consequential or incidental
damages.
The minimum charge for orders from Multiquip
is $15.00 net. Customers will be asked for
instructions regarding handling of orders not
meeting this requirement.
c. Any line item with an extended
dealer net price of less than
$5.00.
d. Special order items.
RETURNED GOODS POLICY
e. Electrical components.
f. Paint, chemicals, and lubricants.
g. Decals and paper products.
h. Items purchased in kits.
Return shipments will be accepted and
credit will be allowed, subject to the following
provisions:
LIMITATION OF WARRANTIES
No warranties, express or implied, are
made in connection with the sale of parts or
trade accessories nor as to any engine not
manufactured by Multiquip. Such warranties
made in connection with the sale of new,
complete units are made exclusively by a
statement of warranty packaged with such
units, and Multiquip neither assumes nor
authorizes any person to assume for it
any other obligation or liability whatever in
connection with the sale of its products. Apart
from such written statement of warranty,
there are no warranties, express, implied or
statutory, which extend beyond the description
of the products on the face hereof.
1. A Returned Material Authorization
must be approved by Multiquip prior to
shipment.
7. The sender will be notified of any material
received that is not acceptable.
8. Such material will be held for five
working days from notification, pending
instructions. If a reply is not received
within five days, the material will be
returned to the sender at his expense.
2. To obtain a Return Material Authorization,
a list must be provided to Multiquip
Parts Sales that defines item numbers,
quantities, and descriptions of the items
to be returned.
9. Credit on returned parts will be issued
at dealer net price at time of the original
purchase, less a 15% restocking
charge.
a. The parts numbers and descriptions
must match the current parts price
list.
b. The list must be typed or computer
generated.
10. In cases where an item is accepted, for
which the original purchase document
can not be determined, the price will be
based on the list price that was effective
twelve months prior to the RMA date.
c. The list must state the reason(s)
for the return.
Effective: February 22, 2006
d. The list must reference the sales
order(s) or invoice(s) under
which the items were originally
purchased.
11. Credit issued will be applied to future
purchases only.
PRICING AND REBATES
e. The list must include the name
and phone number of the person
requesting the RMA.
Prices are subject to change without prior
notice. Price changes are effective on a
specific date and all orders received on or
after that date will be billed at the revised price.
Rebates for price declines and added charges
for price increases will not be made for stock
on hand at the time of any price change.
3. AcopyoftheReturnMaterialAuthorization
must accompany the return shipment.
4. Freight is at the sender’s expense. All
parts must be returned freight prepaid to
Multiquip’s designated receiving point.
PAGE 82 —MC-44S CONCRETE MIXER— OPERATION & PARTS MANUAL — REV. #8 (09/15/11)
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NOTE PAGE
MC-44S CONCRETE MIXER — OPERATION & PARTS MANUAL — REV. #8 (09/15/11) — PAGE 83
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OPERATION AND PARTS MANUAL
HERE’S HOW TO GET HELP
PLEASE HAVE THE MODEL AND SERIAL
NUMBER ON-HAND WHEN CALLING
UNITED STATES
Multiquip Corporate Office
MQ Parts Department
18910 Wilmington Ave.
Carson, CA 90746
Contact: [email protected]
Tel. (800) 421-1244
Fax (800) 537-3927
800-427-1244
310-537-3700
Fax: 800-672-7877
Fax: 310-637-3284
Service Department
Warranty Department
800-421-1244
310-537-3700
Fax: 310-537-4259
Fax: 310-943-2238
800-421-1244
310-537-3700
Fax: 310-537-1173
Technical Assistance
800-478-1244
MEXICO
UNITED KINGDOM
MQ Cipsa
Multiquip (UK) Limited Head Office
Carr. Fed. Mexico-Puebla KM 126.5
Momoxpan, Cholula, Puebla 72760 Mexico
Contact: [email protected]
Tel: (52) 222-225-9900
Unit 2, Northpoint Industrial Estate, Tel: 0161 339 2223
Fax: (52) 222-285-0420 Globe Lane,
Dukinfield, Cheshire SK16 4UJ
Contact: [email protected]
Fax: 0161 339 3226
CANADA
Multiquip
4110 Industriel Boul.
Laval, Quebec, Canada H7L 6V3
Contact: [email protected]
Tel: (450) 625-2244
Tel: (877) 963-4411
Fax: (450) 625-8664
© COPYRIGHT 2011, MULTIQUIP INC.
Multiquip Inc and the MQ 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 their 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, descriptions, references and technical data contained in
this manual are for guidance only and may not be considered as binding. 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.
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