OperatiOn Manual
SerieS
MODel HHXG5
riDe-On trOWel
(B & S VanGuarD DM 950 G GaSOline enGine)
Revision #1 (10/25/10)
To find the latest revision of this
publication, visit our website at:
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
pn: 23110
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prOpOSitiOn 65 WarninG
Engine exhaust and some of
its constituents, and some dust created
by power sanding, sawing, grinding,
drillingandotherconstructionactivities
contains chemicals known to the State
of California to cause cancer, birth
defects and other reproductive harm.
Some examples of these chemicals are:
Leadfromlead-basedpaints.
Crystallinesilicafrombricks.
Cementandothermasonryproducts.
Arsenicandchromiumfromchemically
treatedlumber.
Your risk from these exposures varies,
dependingonhowoftenyoudothistype
of work. To reduce your exposure to
these chemicals: ALWAYS work in a
well ventilated area, and work with
approved safety equipment, such as
dust masks that are specially designed
to filter out microscopic particles.
page 2 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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SilicOSiS/reSpiratOry WarninGS
WARNING WARNING
SILICOSIS WARNING
RESPIRATORY HAZARDS
Grinding/cutting/drilling of masonry, concrete, metal and
other materials with silica in their composition may give
off dust or mists containing crystalline silica. Silica is a
basic component of sand, quartz, brick clay, granite and
numerous other minerals and rocks. Repeated and/or
substantial inhalation of airborne crystalline silica can
cause serious or fatal respiratory diseases, including
silicosis. In addition, California and some other
authorities have listed respirable crystalline silica as a
substance known to cause cancer. When cutting such
materials, always follow the respiratory precautions
mentioned above.
Grinding/cutting/drilling of masonry, concrete, metal and
other materials can generate dust, mists and fumes
containing chemicals known to cause serious or fatal
injury or illness, such as respiratory disease, cancer,
birth defects or other reproductive harm. If you are
unfamiliar with the risks associated with the particular
process and/or material being cut or the composition of
the tool being used, review the material safety data
sheet and/or consult your employer, the material
manufacturer/supplier, governmental agencies such as
OSHA and NIOSH and other sources on hazardous
materials. California and some other authorities, for
instance, have published lists of substances known to
cause cancer, reproductive toxicity, or other harmful
effects.
Control dust, mist and fumes at the source where
possible. In this regard use good work practices and
follow the recommendations of the manufacturers or
suppliers, OSHA/NIOSH, and occupational and trade
associations. Water should be used for dust
suppression when wet cutting is feasible. When the
hazards from inhalation of dust, mists and fumes cannot
be eliminated, the operator and any bystanders should
always wear a respirator approved by NIOSH/MSHA for
the materials being used.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 3
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taBle Of cOntentS
HHXG5 ride-On trowel
Proposition 65 Warning ........................................... 2
Silicosis/Respiratory Warnings................................ 3
Table Of Contents.................................................... 4
Training Checklist..................................................... 6
Daily Pre-Operation Checklist ................................. 7
Safety Information .............................................. 8-13
Dimensions/Specifications (Trowel)....................... 14
Specifications (Engine).......................................... 15
General Information............................................... 16
Controls And Indicators .................................... 17-19
Engine Components (Gasoline) ............................ 20
Setup ..................................................................... 21
Inspection .............................................................. 22
Operation.......................................................... 23-25
Maintenance..................................................... 26-41
Wiring Diagram Gasoline Engine .......................... 42
Wiring Diagram Gasoline Power Unit System ....... 43
Wiring Diagram Trowel........................................... 44
Trowel Troubleshooting .................................. 46-47
Engine Troubleshooting .................................... 48-49
NOTICE
Specifications and part numbers are subject to change
without notice.
page 4 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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nOteS
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 5
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traininG cHeckliSt
TRaININg CHeCKLIST
This checklist will lists some of the minimum requirements for machine maintenance and operation. Please feel free to
detach it and make copies. Use this checklist whenever a new operator is to be trained or it can be used as a review for
more experienced operators.
Training Checklist
No,
Description
OK?
Date
Read operation manual
completely.
1
Machine layout, location of
components, checking of engine
and hydraulic oil levels.
2
3
4
Fuel system, refueling procedure.
Operation of spray and lights.
Operation of controls (machine
not running).
5
Safety controls, safety stop switch
operation.
6
7
8
Emergency stop procedures.
Startup of machine, pre-heat,
engine choke.
9
Maintaining a hover.
Maneuvering.
10
11
12
Pitching.
Matching blade pitch.Twin-Pitch™
13
Concrete finishing techniques.
14
15
16
Shutdown of machine.
Lifting of machine (lift loops).
Machine transport and storage.
page 6 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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Daily pre-OperatiOn cHeckliSt
Daily pre-Operation Checklist
1
Engine oil level
Hydraulic oil level
2
3
4
5
6
7
Radiator coolant level
Condition of blades
Blade pitch operation
Safety stop switch operation
Steering control operation
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 7
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Safety infOrMatiOn
Do not operate or service the equipment before reading
the entire manual. 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.
Potential hazards associated with the operation of this
equipment will be referenced with hazard symbols which
may appear throughout this manual in conjunction with
safety messages.
Symbol
Safety Hazard
SaFeTY meSSageS
Lethal exhaust gas hazards
The four 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 four words:
DaNgeR,WaRNINg, CauTION or NOTICe.
Explosive fuel hazards
Burn hazards
SaFeTY SYmBOLS
DaNgeR
Indicates a hazardous situation which, if not avoided,
WILL result in DeaTH or SeRIOuS INJuRY.
WaRNINg
Indicates a hazardous situation which, if not avoided,
COuLD result in DeaTH or SeRIOuS INJuRY.
Rotating parts hazards
CauTION
Indicates a hazardous situation which, if not avoided,
COuLD result in mINOR or mODeRaTe INJuRY.
NOTICE
Pressurized fluid hazards
Addresses practices not related to personal injury.
Hydraulic fluid hazards
page 8 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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Safety infOrMatiOn
geNeRaL SaFeTY
CauTION
NOTICE
This equipment should only be operated by trained and
qualified personnel 18 years of age and older.
NeveR operate this equipment without proper protective
clothing, shatterproof glasses, respiratory protection,
hearing protection, steel-toed boots and other protective
devices required by the job or city and state regulations.
Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.
Manufacturer does not assume responsibility for any
accident due to equipment modifications. Unauthorized
equipment modification will void all warranties.
NeveR use accessories or attachments that are not
recommended by Multiquip for this equipment. Damage
to the equipment and/or injury to user may result.
Avoid wearing jewelry or loose fitting clothes that may
snag on the controls or moving parts as this can cause
serious injury.
aLWaYS know the location of the nearest
fire extinguisher.
NeveR operate this equipment when not
feeling well due to fatigue, illness or when
under medication.
aLWaYS know the location of the nearest
first aid kit.
NeveR operate this equipment under the
influence of drugs or alcohol.
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 clear the work area of any debris, tools, etc.
that would constitute a hazard while the equipment is
in operation.
No one other than the operator is to be in the working
area when the equipment is in operation.
DO NOT use the equipment for any purpose other than
its intended purposes or applications.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 9
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Safety infOrMatiOn
TROWeL SaFeTY
DaNgeR
NOTICE
aLWaYS keep the machine in proper running condition.
Fix damage to machine and replace any broken parts
immediately.
Engine fuel exhaust gases contain poisonous carbon
monoxide. This gas is colorless and odorless, and can
cause death if inhaled.
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 and unauthorized personnel.
The engine of this equipment requires an adequate free
flow of cooling air.NeveR operate this equipment in any
enclosed or narrow area
A safety manual for operating and maintenance
personnel of concrete power trowels produced by the
Association of Equipment Manufacturers (AEM) can be
obtained for a fee by ordering through their website at
where free flow of the air is
restricted. If the air flow is
restricted it will cause injury
to people and property and
serious damage to the
equipment or engine.
DANGEROUS
GAS FUMES
Order FORM PT-160
eNgINe SaFeTY
WaRNINg
NeveRoperatetheequipmentinanexplosive
atmosphereornearcombustiblematerials.An
explosion or fire could result causing severe
bodily harm or even death.
DO NOT place hands or fingers inside engine
compartment when engine is running.
WaRNINg
NeveR operate the engine with heat shields or
guards removed.
If applicable, NeveR use your hand to find
hydraulic leaks. Use a piece of wood or
cardboard. Hydraulic fluid injected into the
skin must be treated by a knowledgable
physician immediately or severe injury or
death can occur.
Keep fingers, hands hair and clothing away
from all moving parts to prevent injury.
DO NOT remove the radiator cap while the
engine is hot. High pressure boiling water will gush out
of the radiator and severely scald any persons in the
general area of the trowel.
aLWaYS keep clear of rotating or moving
parts while operating the trowel.
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.
DO NOT remove the coolant drain plug
while the engine is hot. Hot coolant will
gush out of the coolant tank and severely
scald any persons in the general area of
the trowel.
DO NOT remove the engine oil drain plug while the
engine is hot. Hot oil will gush out of the oil tank and
severely scald any persons in the general area of the
trowel.
CauTION
NeveR allow passengers or riders on the trowel during
operation.
CauTION
NeveR lubricate components or attempt service on a
running machine.
NeveR touch the hot exhaust manifold,
muffler or cylinder.Allow these parts to cool
before servicing equipment.
NeveR place your feet or hands inside the guard rings
while starting or operating this equipment.
page 10 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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Safety infOrMatiOn
BaTTeRY SaFeTY
NOTICE
NeveR run engine without an air filter or with a dirty air
filter.Severe engine damage may occur.Service air filter
frequently to prevent engine malfunction.
DaNgeR
DO NOT drop the battery.There is a possibility that the
battery will explode.
NeveR tamper with the factory settings
of the engine or engine governor. Damage
to the engine or equipment can result
if operating in speed ranges above the
maximum allowable.
DO NOT expose the battery to open flames,
sparks, cigarettes, etc.The battery contains
combustible gases and liquids. If these
gases and liquids come into contact with a
flame or spark, an explosion could occur.
FueL SaFeTY
DaNgeR
WaRNINg
aLWaYS wear safety glasses when
handling the battery to avoid eye irritation.
The battery contains acids that can cause
injury to the eyes and skin.
DO NOT start the engine near spilled fuel or combustible
fluids. Fuel is extremely flammable and its vapors can
cause an explosion if ignited.
Use well-insulated gloves when picking up
the battery.
aLWaYS refuel in a well-ventilated area, away from
sparks and open flames.
aLWaYS keep the battery charged. If the battery is not
charged, combustible gas will build up.
aLWaYS use extreme caution when working with
flammable liquids.
DO NOT charge battery if frozen. Battery can explode.
When frozen, warm the battery to at least 61°F (16°C).
DO NOT fill the fuel tank while the engine is running
or hot.
aLWaYS recharge the battery in a well-ventilated
environmenttoavoidtheriskofadangerousconcentration
of combustible gases.
DO NOT overfill tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or sparks from
the ignition system.
If the battery liquid (dilute sulfuric acid)
comes into contact with clothing or skin,
rinse skin or clothing immediately with
plenty of water.
Store fuel in appropriate containers, in well-ventilated
areas and away from sparks and flames.
NeveR use fuel as a cleaning agent.
DO NOT smoke around or near the
equipment. Fire or explosion could result
from fuel vapors or if fuel is spilled on a
hot engine.
If the battery liquid (dilute sulfuric acid) comes into
contact with eyes, rinse eyes immediately with plenty
of water and contact the nearest doctor or hospital to
seek medical attention.
CauTION
aLWaYS disconnect the NegaTIve battery terminal
before performing service on the equipment.
aLWaYS keep battery cables in good working condition.
Repair or replace all worn cables.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 11
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Safety infOrMatiOn
TRaNSpORTINg SaFeTY
CauTION
TOWINg SaFeTY
CauTION
NeveR allow any person or animal to
stand underneath the equipment while
lifting.
Check with your local county or state safety
towing regulations, in addition to meeting
Department of Transportation (DOT)
SafetyTowing Regulations, before towing
your trowel.
Ride-on trowels are very heavy and
awkward to move around. Use proper
heavy lifting procedures and DO NOT
attempt to lift the trowel by the guard rings.
In order to reduce the possibility of an accident while
transporting the trowel on public roads, aLWaYS make
sure the trailer that supports the trowel and the towing
vehicle are mechanically sound and in good operating
condition.
NOTICE
The easiest way to lift the trowel is to utilize the lift loops
that are welded to the frame.These lift loops are located
to the left and right sides of the operator’s seat.
aLWaYS shutdown engine before transporting
Make sure the hitch and coupling of the towing vehicle
are rated equal to, or greater than the trailer “gross
vehicle weight rating.”
A strap or chain can be attached to these lift loops,
allowing a forklift or crane to lift the trowel up onto and
off of a slab of concrete.The strap or chain should have
a minimum of 2,000 pounds (1,000 kg) lifting capacity
and the lifting gear must be capable of lifting at least this
amount.
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.
NeveR transport trowel with float pans attached unless
safety catches are used and are specifically cleared for
such transport by the manufacturer.
aLWaYS make sure the trailer is equipped with a safety
chain.
NeveR hoist the trowel more than three feet off the
ground with float pans attached.
aLWaYS properly attach trailer’s safety chains to towing
vehicle.
Before lifting, make sure that the lift loops are not
damaged.
aLWaYS make sure the vehicle and trailer directional,
backup, brake and trailer lights are connected and
working properly.
Always make sure crane or lifting device has been
properly secured to the lift loops of the equipment.
DOT Requirements include the following:
aLWaYS shutdown engine before transporting.
• Connect and test electric brake operation.
NeveR lift the equipment while the engine is running.
• Secure portable power cables in cable tray with tie
wraps.
Tighten fuel tank cap securely and close fuel cock to
prevent fuel from spilling.
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.
Use adequate lifting cable (wire or rope) of sufficient
strength.
DO NOT lift machine to unnecessary heights.
Avoid sudden stops and starts.This can cause skidding,
or jack-knifing. Smooth, gradual starts and stops will
improve towing.
aLWaYS tie down equipment during transport by
securing the equipment with rope.
Avoid sharp turns to prevent rolling.
page 12 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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Safety infOrMatiOn
Trailer should be adjusted to a level position at all times
when towing.
Raise and lock trailer wheel stand in up position when
towing.
Place chock blocks underneath wheel to prevent rolling
while parked.
Place support blocks underneath the trailer’s bumper to
prevent tipping while parked.
Use the trailer’s swivel jack to adjust the trailer height to
a level position while parked.
eNvIRONmeNTaL SaFeTY
NOTICE
Dispose of hazardous waste properly.
Examples of potentially hazardous waste
are used motor oil, fuel and fuel filters.
DO NOT use food or plastic containers to dispose of
hazardous waste.
DO NOT pour waste, oil or fuel directly onto the ground,
down a drain or into any water source.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 13
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DiMenSiOnS/SpecificatiOnS (trOWel)
Figure 1. HHX Dimensions
Table 1. HHX Specifications
SpeCIFICaTION paRameTeR
HHXg5 (vaNguaRD)
A–Length – in. (cm)
B–Width – in. (cm)
C–Height – in. (cm)
98.00 (249)
50.0 (127)
54.0 (137.2)
Weight – lbs. (kgs.) Operating
Weight – lbs. (kgs.) Shipping
Sound Pressure – dBA2
Vibration – ft/s2 (m/ s2)3
Blade Tip Speed – FPM (m/s)
Fuel Tank – gallons (liters)
Rotor – RPM
1,397 (634)
1,472 (668)
tbd
tbd
1425 (7.24)
9 (34)
40 to 170
91 (231)
Path Width – in. (cm)
Hydraulic Oil4
Whiteman P/N 10139 0r ISO 680
NOTICE
1. Sound pressure is "A" weighted . Measured at the
operators ear position while the ride-on trowel is
operating at full throttle on concrete in a manner
most often experienced in “normal ” circumstances.
Sound pressure may vary depending upon the
condition of the concrete.Hearing protection is always
recommended.
2. The vibration level indicated is the maximum RMS
(Root Mean Square) value obtained at the handle grip
while operating the ride-on trowel on curing concrete
in a manner most often experienced in “normal ”
circumstances. Values were obtained from all three
axes of motion. The values shown represent the
maximum RMS value from these measurements.
page 14 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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SpecificatiOnS (enGine)
Table 2. HHXg5 engine Specifications
model
Type
vanguard Dm950g
Gasoline
Cylinders
3
Displacement
58.1 cu.in. (952 cc)
31 HP (23.1 kW) @3600 rpm
2.83 in. x 3.07 (72 mm x 78 mm)
70.0 Nm @ 2200 rpm
8.7 : 1
Power (Maximum Output)
Bore and Stroke
Maximum Torque (Intermittent)
Compression Ratio
Cooling System
Fully jacketed water-cooled
3.2 qt. (3 liters)
Engine Oil Capacity
3.5 qt. (3.3 liters) w/ oil filter
replacement
Lubricating System
Fuel Tank
Pressure feed with spin-on filter
9 gal. (34 liters)
Fuel Delivery System
Carbureted
144 oz. (4.26 liters)
ISO 22O AGMA GR 5EP
Helical Gearbox Gear
Compound Capacity
Gasoline - minimum of 87 octane
rating
Fuel
Starting System
Dry Weight
Electric Starter
143.3 lbs. (65 Kg)
17.4 in. x 17.1 in. x 19.7 in
(441.8 mm x 443.2 mm x 501.4
mm).
Dimensions (L x W x H)
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 15
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General infOrMatiOn
HHX RIDe-ONTROWeL FamILaRIzaTION
geaRBOXeS
The HHX is designed for the floating and finishing of
concrete slabs.
The HHX consist of two separate gearbox assemblies that
are enclosed in rugged cast aluminum gear cases.
Take a walk around your trowel. Take notice of all the
major components like the engine, blades, air cleaner,
fuel system, fuel shut-off valve, ignition switch etc. Ensure
engine and gearbox lubricant levels are within proper
operating range and maintain a proper level of hydraulic
fluid in the hydraulic fluid reservoir.
The gearbox casing holds 50% more oil capacity than
competitors, which allows more lubrication to be provided
to critical points.
HYDRauLIC STeeRINg
Dual palm grip joystick controls located to the left and
right of the operator are provided for steering the HHX.
The joysticks are linked to three hydraulic steering
cylinders located within the frame of the machine.Detailed
explanation of how the joystick controls affect the steering
of the trowel can be found in the Operation section of this
manual.
Read all the safety instructions carefully.Safety instructions
will be found throughout this manual and on the machine.
Keep all safety information in good, readable condition.
Operators should be well trained on the operation and
maintenance of the trowel.
Look at the operator Control Joysticks. Grasp the Control
Joysticks and move them around a bit. Observe how
moving the Control Joysticks cause the gearboxes and
frame to move.
See the steering chart (Table 3) for infomation on the effect
the steering joysticks have upon the steering direction of
the machine.
CONSTaNT veLOCITY JOINTS (Cv-JOINTS)
Notice the foot pedal which controls the engine and blade
speed. Also take a look at the main driveline of the trowel.
Take note and reference how the belts look, this is the way
the belts should look when adjusted properly.
Constant velocity joints insure the efficient transfer of power
to the drive shaft and maintains the timing of the gearboxes
without any chance of slippage.
Before using your trowel, test it on a flat watered down
section of finished concrete.This trial test run will increase
your confidence in using the trowel and at the same time it
will familiarize you with the trowel’s controls and indicators.
In addition you will understand how the trowel will handle
under actual conditions.
TRaININg
For proper training, please use the “TRaININg
CHeCKLIST” located in the front of this manual. This
checklist will provide an outline for an experienced operator
to provide training to a new operator.
eNgINe HHXg5
Figure 2, Figure 3, and Figure 4 show the location of the
controls, indicators and general maintenance parts. Each
control may perform more than one function.
The HHXG5 Ride-On Power Trowel is equipped with a liquid
cooled 31 HPVanguard gasoline engine.Refer to the engine
owner’s manual for specific instructions regarding engine
operation. This manual is included with the ride-on trowel at
the time of shipping. Please contact your nearest Multiquip
Dealerforareplacementshouldtheoriginalmanualdisappear.
BLaDeS
The blades of the ride-on power trowel finish the concrete as
they are swirled around the surface. Blades are classified as
combination (10 or 8 inches wide), finish (6 inches wide).The
HHX is equipped with five blades per rotor equally spaced
in a radial pattern and attached to a vertical rotating shaft by
means of a spider assembly.
page 16 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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cOntrOlS anD inDicatOrS
1
2
6
5
4
12
4
13
35
8
35
10
7
3
11
9
9
16
15
14
Figure 2. HHXG5 Controls and Indicators (Front)
8. Ignition Switch — With key inserted turn clockwise
to start engine.
1. Seat — Place for operator to sit. Engine will not start
unless operator is seated. Seat is adjustable, fore and
aft for operator comfort.
9. Lights — 12V Halogen, 4 fore and 2 aft.
2. Steering Control Joystick (right side) — Allows the
unit to move in either a forward, reverse left or right
direction. See page 24 for additional Information.
10. Right Side guard — Remove to access Radiator and
to allow Right Clamshell to open for Service.
11. Left Side guard — Remove to access Battery and to
allow Left Clamshell to open for Service.
3. Front guard — Remove this Guard Cover to access
left side of engine and other internal components.
12. Left Side Clamshell — Open to allow access for
service and maintenance.
4. pitch Control — Adjusts the blade pitch separately
for each side of the trowel.
13. Right Side Clamshell — Open to allow access for
service and maintenance.
5. Hour meter — Indicates number of hours machine has
been in use or hours engine was run.
14. By-pass Indicator — Sight glass located in-line and
just above the Hydraulic By-Pass Filter. System in a
By-Pass condition when indicator in the red area.
6. Steering Control Joystick (left side) — Allows the
unit to move in either a forward, reverse left or right
direction. See Page 24 for additional Information.
15. Hydraulic By-pass Filter — Filters contaminants from
hydraulic system during a By-Pass condition.
7. Light Switch —When activated, turns on four halogen
lights. Lights offer better visibility when working
indoors.
16. magnetic Drain plug — Remove to drain hydraulic oil
from hydraulic system.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 17
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cOntrOlS anD inDicatOrS
25 26
27
23
19
18
19
35
35
28
29
17
22
21
20
30
24
Figure 3. HHXG5 Controls and Indicators (Rear)
24. Oil Filter — Provides oil filtering for the engine.
17. Rear guard — Remove to access right side of
engine and internal components for service and
maintenance.
25. Oil Indicator Light — Lights red when oil pressure
is low.
18. Safety-Stop Switch — Shuts down engine when
operator is not sitting in seat .
26. Water Temperature Light — Lights red when water
temperature is high.
19. Lift points — Located on both the left and right sides
of the main frame.Used when the trowel must be lifted
onto a concrete slab.
27. Charge Indicator — Lights red when electrical system
is not charging properly.
28. exhaust Outlet — Exhaust gases routed through
muffler and out the back of the rear guard.
20. Right-Side Spider — Consists (basic) of trowel arms,
blades, wear plate, and thrust collar etc.
29. air Filter assembly — Helps prevent dirt and debris
from entering the fuel system. Lift Locking Latch on
cannister to gain access to filter element.
21. Left-Side Spider — Consists (basic) of trowel arms,
blades, wear plate, and thrust collar etc.
22. Fuel Filler Cap — Remove this cap to add fuel.
30. Document Box — Use to hold and protect Operation
Manual.
23. engine Dip Stick — Indicates engine oil level. Add
oil as required.
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cOntrOlS anD inDicatOrS
31
35
41
33
34
23
35
36
42
39
37
32
38
43
40
44
35
Figure 4. HHXG5 Controls and Indicators (Clamshell Open)
31. Radiator/Filler Cap — Holds coolant or water
necessary to keep engine at a safe operating
temperature. Remove this cap to add water or
antifreeze.
38. Battery—Provides+12VDCpowertotheelectricalsystem
39. Right Side Clamshell — Remove two bolts to open
for service and maintenance access.
40. Left Side Clamshell — Remove two bolts to open for
service and maintenance access.
32. Blade Speed pedal — Slow blade speed is
accomplished by slightly depressing the foot pedal
while maximum blade speed is accomplished by fully
depressing the pedal.
41. Retardant Spray Filler Cap — Remove this cap to
add spray retardant.
33. Overflow Bottle — Supplies coolant to the radiator
when radiator coolant level is low.Fill to indicated level
as shown on bottle.
42. BurpTank — Hydraulic Fluid top-off point.
43. Test port-Hydraulic pressure — Hook test guage to
testporttodeterminehydraulicpressureduringoperation.
34. engine Oil Filler Cap — Remove this cap to add
engine oil.
44. Retardant Spray Control Button — Located on both
joysticks.When pressed, allows retardant spray to flow
through the spray nozzle.
35. Clamshell Securing Bolt Location (4 places) —
Remove to open clamshell.
The following section is intended as a basic guide to the
ride-on trowel operation, and is not to be considered
a complete guide to concrete finishing. It is strongly
suggested that all operators (experienced and novice) read
“Slabs on Grade ” published by the American Concrete
Institute, Detroit Michigan.
36. Clutch and Belt — Drive Pulleys transfer power from
the engine to the gearboxes
37. Spare Belt Carrier — Contains a spare drive belt for
expedient belt replacement.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 19
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enGine cOMpOnentS (GaSOline)
Figure 5. Engine Components (Gasoline Engine)
The following refer to the basic engine components for
linked to the accelerator system.
reference (Figure 5). Refer to the manufacturer's engine
manual for instructions and details of operation and
servicing.The engine shown above is a Briggs & Stratton
Vanguard GASOLINE engine.
10. Oil Drain — Used to drain crankcase oil. Always
dispose of used oil and oil filters in an environmentally
safe manner. DO NOT allow used oil to drain onto the
ground or into a water runoff drain.
1. Thermostat — Regulates the temperature of the
engine coolant.
11. Oil Filter — Prevents dirt and other debris from
entering the engine oil.
2. Oil Filler Cap — Remove to add engine oil.
3. Ignition Coil — Regulates coolant temperature.
12. Oil Dip Stick — Remove to check amount and
condition of oil in crankcase. Lift Seat to access.
4. electric Starter — Starts engine when ignition key is
rotated to the "START" position.
13. Oil pressure Sending unit — Device that measures
engine oil pressure.
5. Oil pan — Holds a maximum of 3.2 quarts (3.0 liters)
of motor oil.
14. Carburetor — Low-emission carburetor equipped with
an idle mixture valve with a limiter which allows
adjustment.
6. alternator — Provides current to the electrical system
and charges the battery.
WaRNINg
7. Spark plug — Provides spark to the ignition system.
Set spark plug gap to 0.028 ~ 0.031 inch (0.6~0.7 mm).
Clean spark plug once a week.
Engine components can generate extreme
heat. To prevent burns, DO NOT touch
these areas while the engine is running or
immediatelyafteroperating.NeveRoperate
the engine with the muffler removed.
8. Coolant Temperature Sending unit — Device that
measures coolant temperature.
9. governor Lever — This lever restricts engine speed
(high idle or low idle) through a speed control device
page 20 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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Setup
TROWeL SeTup INSTRuCTIONS
DaNgeR
The purpose of this section is to assist the user in the setting
up of a NeW trowel. If your trowel is already assembled
(seats, handles, knobs and battery, then this section can
be skipped.
Use all safety precautions specified by the battery
manufacturer when working with the battery.
Flammable, explosive gas. (produces
hydrogen gas while charging or during
operation). Keep area around battery well
ventilated and keep from any fire source.
NOTICE
The new ride-on trowel cannot be put into service until
the setup installation instructions are completed.These
pre-setup instructions only need to be performed at the
time of unpacking a NeW trowel.
Battery electrolyte contains corrosive, toxic
chemical. (dilute sulfuric acid). Avoid
contact with eyes and skin.
Shock or Fire due to electric short-
circuit. Disconnect battery cables before
inspecting electrical system and never
"spark" battery terminals to test for
charge.
Before packaging and shipping this Whiteman Ride-On
Power Trowel was run and tested at the factory. If there are
problems with the trowel, please let us know.
NOTICE
HHX trowels have a seat that is mounted on tracks,
similar to an automobile seat.This seat can be adjusted
fore and aft via the Control Joystick under the front of
the seat.
.
NOTICE
aLWaYS be sure the battery cables are properly
connected to the battery terminal. 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.
BaTTeRY SeTup
This trowel was shipped with a wet charged battery. This
battery may need to be charged for a brief period of time
as per the manufacturer instructions.
CauTION
Use all safety precautions specified by the battery
manufacturer when working with the battery. See
further specific safety information on page 11 of this
manual.
To install the battery on the trowel, make sure that the
battery is well seated in the battery box and the terminals
are properly connected.The positive cable, normally red, is
associated with the "+" symbol on the battery.The negative
cable, normally black, is associated with the "-" symbol
on the battery, (Figure 6). Connect the positive cable to
the positive terminal on the battery first, then connect the
negative cable to the negative terminal. Close the plastic
battery box cover and secure the battery box.
1
2
Figure 6. Battery Cable Orientation
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 21
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inSpectiOn
This section is intended to assist the operator with the
initial start-up of the HHX. It is extremely important that
this section be read carefully before attempting to use the
trowel in the field.
the gearbox, and refill with ISO 220 A GMA GR 5 EP oil.
FILL PLUG
DO NOT use your ride-on power trowel until this section is
thoroughly understood.
WaRNINg
DRAIN PLUG
SIGHT GLASS
(OIL CHECK)
Failure to understand the operation of the HHX could
result in severe damage to the trowel or personal
injury.
Figure 8. Gearbox Oil Plugs
See Figure 2, Figure 3, and Figure 4 for the location of any
control or indicator referenced in this manual.
FueL
To determine if the engine fuel is low, view the sight gauge
on the side of the fuel tank. If fuel level is low, fill with
unleaded gasoline.
eNgINe OIL LeveL
1. Pull the engine oil dipstick from its holder.
2. Determine if engine oil is low (Figure 7), add
correct amount of engine oil to bring oil level
to a normal safe level (Table 4)..
WaRNINg
Handle fuel safely.Motor fuels are highly flammable and
can be dangerous if mishandled.DO NOT smoke while
refueling. Do not attempt to refuel the ride-on trowel if
the engine is hot or running.
CauTION
DO NOT overfill engine oil. Oil level should not be
above the top fill line.
WaRNINg
Never store the ride-on trowel with fuel in the tank
for any extended period of time. Drain fuel into an
appropriate recepticle. Drain by opening the fuel
petcock at the bottom of the tank. Always clean up
spilled fuel immediately.
DIPSTICK
SAFE
OPERATING
LEVEL
MAX
ADD OIL
HYDRauLIC FLuID FILTeR
MIN
To determine if the hydraulic fluid filter needs to be changed,
view the sight gauge above the hydraulic filter located
beneath the foot platform.. If the gauge reads in the red
area, indicating a fiter by-pass condition, the filter needs
to be replaced.
Figure 7. Engine Oil Dipstick
geaRBOX OIL LeveL
1. Check the gearbox oil level in both gearboxes
by viewing the sight glass at the rear of the
gearbox. See Figure 8.
2. The oil level of the gear box should be at the
half-way point of the sight glass. The gear box oil
capacity is 1 U.S. Gallon, (3.79 liters). If additional oil
is required, unscrew the oil fill plug located on top of
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OperatiOn
2. The foot pedal (Figure 9) controls blade and engine
speed. The position of the foot pedal determines the
blade speed. Slow blade speed is obtained by slightly
depressing the pedal. Maximum blade speed is
obtained by fully depressing the pedal.
STaRTINgTHe eNgINe
1. Place one foot on the trowel's platform, grab ahold
of any part of the frame (NOT THE JOYSTICKS), lift
yourself onto the trowel, then sit down in the operator's
seat.
3. Keep your foot OFF the foot pedal. If the engine is
cold, adjust the choke but in all circumstances, start
the engine at idle (without touching foot pedal).
NOTICE
The HHX is equipped with a safety stop switch that
will not allow the engine to start unless an operator is
sitting in the operator’s seat.The weight of an operator
depresses an electrical switch, which allows the engine
to start.
4. Insert the ignition key into the ignition switch .
5. Turn the ignition key clockwise to the (start) position.
The oil and charge indicator lights, (Figure 10) should
be on
WaRNINg
NOTICE
NEVER disable or disconnect the safety stop switch.It is
provided for the operator's safety and injury may result if
it is disabled, disconnected or improperly maintained.
OIL and CHARGE indicator lights come on when
ignition switch is in the ON position, and the engine is
NOT running.
.
NOTICE
The safety stop switch should be used to stop the
engine after every use.Doing this will verify the switch is
working properly thus providing safety for the operator.
Remember to turn the key to the “OFF” position after
stopping the machine. Not doing so may drain the
battery.
Figure 10. Oil and Charge Indicator Lights
6. Turn ignition key fully clockwise and listen for engine
to start. Once engine has started release ignition key.
7. If the engine fails to start in this manner, consult the
engine owner's manual supplied with the trowel.
8. Test the safety kill switch by standing up briefly. The
switch under the seat should cause the engine to stop.If
the kill switch fails to shut down the engine.Turn off the
engine with the key switch and fix the safety kill switch.
See Troubleshooting Chart for possible problems.
Figure 9. Blade Speed Control Foot Pedal
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 23
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OperatiOn
9. Repeat this section a few times to get fully acquainted
with the engine starting procedure.
4. Practice maneuvering the ride-on trowel using the
information listed in Table 3 Try to practice controlled
motions as if you were finishing a slab of concrete.
Practice edging and covering a large area.
10. Let the engine idle for 3-5 minutes. If choke is applied,
push the choke to the open position as soon as the
engine will run smoothly.
5. Try adjusting the pitch of the blades.This can be done
with the ride-on trowel stopped or while the trowel is
moving, whatever feels comfortable.Test the operation
of optional equipment like retardant spray and lights
if equipped.
STeeRINg
Two joysticks (Figure 11) located to the left and right of the
operator’s seat provide directional control for the HHX
Ride-On Power Trowel. Table 3 illustrates the various
directional positions of the joysticks and their effect on the
ride-on trowel.
6. Push both the left and right joysticks backward and
repeat steps 3 through 6 while substituting the word
reverse for forward.
NOTICE
Table 3. Control Joystick Directional positioning
CONTROL JOYSTICK
RESULT
All directional references with respect to the steering
Control Joysticks are from the operator’s seat
position.
& DIRECTION
Causes only the
left side of the
Move LEFT Joystick
FORWARD
ride-on trowel to
move forward.
1. Push both the left and right Control Joysticks forward.
See Figure 11.
Causes only the
left side of the
ride-on trowel to
move backward.
Move LEFT Joystick
BACKWARD
FORWARD
LEFT JOYSTICK
Causes only the
right side of the
ride-on trowel to
move forward.
Move RIGHT Joystick
CONTROL
LEFT
FORWARD
FORWARD
REVERSE
Move RIGHT Joystick
Causes only the
right side of the
ride-on trowel to
move backward.
BACWARD
RIGHT
REVERSE
Move BOTH Joysticks
Causes the ride-on trowel
to move forward in
a straight line.
RIGHT JOYSTICK
CONTROL
FORWARD
Causes the ride-on trowel
to move backard in
a straight line.
Move BOTH Joysticks
Figure 11. Left and Right Control Joysticks
BACKWARD
2. With your right foot quickly depress the right foot
pedal halfway. Notice that the ride-on power trowel
begins to move in a forward direction. Return both
joystick controls to their neutral position to stop forward
movement, then remove your right foot from the right
foot pedal.
Move BOTH Joysticks
Causes the ride-on trowel
to move to the right.
to the RIGHT
Move BOTH Joysticks
Causes the ride-on trowel
to move to the left.
to the LEFT
3. Practice holding the machine in one place as you
increase blade speed. When about 75% of maximum
blade speed has been reached, the blade will be
moving at proper finishing speed.The machine may be
difficult to keep in one place.Trying to keep the ride-on
trowel stationary is a good practice for operation.
page 24 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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OperatiOn
Blade pitch
OPERATING POSITION
Sometimes it may be necessary to match blade pitch
between the two sets of blades. There are some signs
that this may be necessary. For example, the differences
in pitch could cause a noticeable difference in finish quality
between the two sets of blades. Or, the difference in blade
pitch could make the machine difficult to control. This is
due to the surface area in contact with the concrete (the
blade set with the greater contact area tends to stick to the
concrete more).
DISENGAGED
(ONE SIDE)
Matching Blade Pitch for Both Sets of Blades
Trowels equipped with Twin PitchTM Controls may need
to have blade pitch between the two sets of blades
"syncronized". If the blades need to be syncronized this
is easily accomplished by performing the following. Refer
to Figure 12.
1. Lift the pitch adjustment handle on either side. Once
lifted, that side is now disconnected from the Twin
PitchTM system.
2. Adjust to match the opposite side.
3. When adjusted, lower the handle to Twin PitchTM
operating position.
Figure 12. Pitch Towers
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 25
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Maintenance
4. Replace engine oil and filter as necessary. (See
following section on Oil and Filter
maINTeNaNCe
When performing any maintenance on the trowel or
engine, follow all safety messages and rules for safe
operation stated at the beginning of this manual. See the
engine manual supplied with your machine for appropriate
engine maintenance schedule and troubleshooting guide
for problems.
5. Check and retighten all fasteners as necessary.
monthly (100-150 Hours)
1. Remove, clean, reinstall and relube the arms and thrust
collar. Adjust the blade arms.
At the front of the book there is a “Daily Pre-Operation
Checklist”. Make copies of this checklist and use it on a
daily basis.
2. Replace gearbox lubricant after the first 100 hours of
operation. Replace every 500-600 hours.
3. Check drive belt for excessive wear.
.
4. Replace engine oil and filter as necessary, see engine
manual.
WaRNINg
Accidental starts can cause severe injury
or death.
Yearly (500-600 Hours)
1. Check the arm bushings, thrust collar bushings, shaft
seals and belts. Replace if necessary
2. Check pitch control cables for wear.
3. Replace gearbox lubricant.
ALWAYS place the ON/OFF switch in the
OFF position.
4. Check and adjust blade speed. l.
Disconnect and ground spark plug leads
and disconnect negative battery cable
from battery before servicing.
Table 4. Oil Chart
maINTeNaNCe SCHeDuLe
Daily (8-10 Hours)
1. Thoroughly remove dirt and oil from the engine and
control area.
2. Check the fluid levels in the engine and gearboxes,
fill as necessary. Check air filter. See section on air
filter servicing..
WaRNINg
Weekly (30-40 Hours)
Certain maintenance operations or machine
adjustments require specialized knowledge and skill.
Attempting to perform maintenance operations or
adjustments without the proper knowledge, skills or
training could result in equipment damage or injury to
personnel. If in doubt, consult your dealer.
1. Relube arms, thrust collar and steering links.
2. Replace blades if necessary.
3. Check and clean or replace the engine air filter
as necessary. (See following section on air Filter
Maintenance.)
page 26 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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Maintenance
2. Remove the oil filler cap and fill engine crankcase with
recommended type oil as listed in Table 4. Fill to the
upper limit of dipstick.
air Cleaner (Daily)
The Briggs and StrattonVanguard engine is equipped with a
replaceable, high-density paper air cleaner element.Check
the air cleaner daily or before starting the engine. Check
for and correct heavy buildup of dirt and debris along with
loose or damaged components, (Figure 13).
3. Crankcase oil capacity with oil filter replacement is 3.5
qts. (3.3 liters).
Oil Filter (300 Hours)
1. Replace the engine oil filter (Figure 14) every other oil
change or 300 hours. Refer to your engine manual for
specific details to perform this operation.
AIR CLEANER BODY
CARTRIDGE
SEAL
COVER
LATCHES (COVER CLAMPS)
Figure 14. Oil FIlter
Figure 13. Air Cleaner
1. Unlock the cover clamps and remove cover.
2. Remove cartridge from air cleaner body.
2. Be sure to coat the seal (Figure 14) of the new oil filter
with clean engine oil.
Fuel Filter
3. Clean cartridge by gently tapping the end with the
handle of a screwdriver. Replace cartridge if very dirty
or damaged.
Replace the engine fuel filter (Figure 15) every 800
hours. Refer to your engine manual for specific details
to perform this operation.
4. Carefully clean out the air cleaner cover.
5. Install cartridge in body.
6. Install cover and lock cover clamps.
NOTICE
Operating the engine with loose or damaged air cleaner
components could allow unfiltered air into the engine
causing premature wear and failure.
Figure 15. Fuel Filter
Changing engine Oil and Filter
1. Change the engine oil and filter after the first 5 hours
of use, then change oil every 6 months or 150 hours.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 27
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Maintenance
2. Check and keep battery electrolyte between upper and
lower limits indicated on the battery. Never operate or
recharge without sufficient fluid in the battery.
Oil/Water Separator
Drain water from the bottom of the fuel filter by loosening the
drain plug and allowing the water to drain out.Refer to your
engine manual for specific details to perform this operation.
3. Never attempt to charge a battery that is frozen. The
battery can explode unless first allowed to thaw.
Oil and Fuel Lines
4. Disconnect the negative terminal ( - ) of the battery
during storage. If unit will be stored where ambient
temperature will drop to -15oC or less, remove and
store battery in a warm, dry place.
1. Check the oil and fuel lines and connections regularly
for leaks or damage. Repair or replace as necessary.
2. Replace the oil and fuel lines every two years to
maintain the line's performance and flexibility.
LongTerm Storage
Radiator/Cooling System
Remove the battery.
Drain fuel from fuel tank.
WaRNINg
Clean exterior with a cloth soaked in clean oil.
Hot coolant can cause severe burns. DO NOT remove
cap if radiator is HOT.
Store unit covered with plastic sheet in moisture and
dust-free location out of direct sunlight.
1. Check and clean radiator fins.
2. Check cooling water.
CauTION
Never store the ride-on trowel with fuel in the tank for
any extended period of time. Always clean up spilled
fuel immediately.
3. Check radiator hoses for fatigue or cracking.
4. Check radiator cap seal.
Battery/Charging System
engineTune-up
1. Check and clean battery terminals for corrosion.
See your engine manual for specific information on tuning
up your engine.
DaNgeR
Use all safety precautions specified by the battery
manufacturer when working with the battery.
NOTICE
Flammable, explosive gas. (produces
hydrogen gas while charging or during
operation). Keep area around battery well
ventilated and keep from any fire source.
See the engine manual supplied with your machine
for appropriate engine maintenance schedule and
troubleshooting guide for problems.
Battery electrolyte contains corrosive, toxic
chemical. (dilute sulfuric acid). Avoid
contact with eyes and skin.
CauTION
ALWAYS disconnect battery cables before attempting
any service or maintenance on the ride-on trowel.
Shock or Fire due to electric short-
circuit. Disconnect battery cables before
inspecting electrical system and never
"spark" battery terminals to test for charge.
page 28 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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Maintenance (OlD Style clutcH)
A 3/4 X 1 X 3-1/4 inch wooden block may assist in
helping to hold the lower pulley apart during removal
and replacement of belt).
NOTICE
This section is intended to aid users in the maintenance
of drive assemblies with an old style Comet clutch.
CheckingThe Drive Belt
The drive belt needs to be changed as soon as it begins
to show signs of wear. DO NOT reuse a belt under any
circumstances. Indications of excessive belt wear are
fraying, squealing when in use, belts that emit smoke or a
burning rubber smell when in use.
Figure 16. Upper Clutch (Drive Pulley)
Removal Tool
Under normal operating conditions, a drive belt may last
approximately 150 hours.If your trowel is not reaching this
kind of life span for drive belt wear, check the drive belt for
proper pulley alignment and spacing .
Upper (Drive) Pulley
Spare
Drive Belt
Holder
To gain access to the drive belt, remove left-side end-grate
and open left "Clamshell", then visually inspect the drive
belt for signs of damage or excessive wear. If the drive belt
is worn or damaged, replace the drive belt
WaRNINg
DO NOT attempt to insert hands or tools
into the belt area while the engine is running
and the safety guard has been removed.
Keep fingers, hands, hair and clothing away
fromallmovingpartstopreventbodilyinjury.
WaRNINg
Spare Drive Belt
Allow the entire trowel to cool down before
performing this procedure.
Lower (Driven) Pulley
Figure 17. Drive Belt, Belt Holder and Pulleys
1. Remove Left-side End Grate and open Left "Clamshell"
(see Figure 4) to gain access to Drive Belt, Spare Drive
Belt, and Pulleys (Figure 17)
Removing the Drive Belt
Leave the existing drive belt intact until instructed to cut it.
Leave the engine in place for this procedure. It is not
necessary to slide the engine to replace the drive belt.
2. Squeeze the drive belt as shown in Figure 18, and pull
the V-belt upwards.This will spread open the faces of
the lower drive pulley.
Locate the Clutch Removal Tool provided with the trowel,
p/n23294locatedwithinthedocumentationbox(Figure16)
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 29
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Maintenance (OlD Style clutcH)
1. If necessary, refer to Removing Drive Belt Instructions.
Ensure all remnants of old belt have been removed
from pulleys.
Upper Pulley
Drive Belt
Lower Pulley
Fixed Face
2. Remove the 2 bolts that secure the drive belt carrier.
(Figure 20) This will allow free movement of the belt
for installation. Take care with to not contaminate the
relplacement belt with grease or dirt.
3. Remove the 5/8 Bolt from the Upper Drive Pulley.You
will need to hold the flywheel in place by using a large
flat blade screwdriver or suitable pry bar.
4. Again hold the flywheel in place as above and thread
the Special Upper Drive Pulley Removal Tool (Figure
16), into the Upper Drive Pulley. Tighten until the
taperlock breaks free. Slide the pulley off the shaft.
Lower Pulley
Moveable Face
Lower Pulley
Spread Apart
Figure 18. Expanding Lower Drive Pulley
5. Place the replacement belt into the lower pulley first.
(A wood block may help holding the lower pulley open).
3. A wooden block inserted between the moveable face
and the fixed face of the lower drive pulley may help
keep the lower drive pulley faces open while installing
the new drive belt. See Figure 19.
6. Place the other end of the belt over the upper drive
pulley into the pulley groove and slide the pulley back
onto the tapered shaft.
7. Use threadlock, (Loctite Blue 246) on 5/8" retaining
bolt, thread into pulley and tighten.
8. Reinstall the spare belt carrier and the drive belt guard.
Insert
Wood Block
9. Replace the spare belt before the next trowel use.See
spare drive belt replacement procedures.
Wooden Block
Spare Drive
Belt Carrier
Figure 19. Holding Lower Pulley Open
4. If the belt is not being reused (recommended), CUT
the drive belt. Ensure all belt remnants are removed
from the pulleys.
Installing the Drive Belt (using New Drive Belt)
The HHX is equipped with a replacement drive belt (spare)
carrier, which is mounted on the inboard side of the platform
between the battery and the clutch. Make sure that there
is ALWAYS a spare drive belt in the drive belt carrier before
the trowel is placed on a slab to finish concrete.
CV Joint
In the event of a drive belt failure, the spare (replacement)
drive belt can be used for quick replacement at the job site
to continue trowel operation.
Lower
New Spare
(Driven) Pulley
Drive Belt
Figure 20. Drive Belt Install
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Maintenance (OlD Style clutcH)
The HHX is equipped with a "CVT" type clutch which
supplies torque to both the left and right gear boxes.
Spare Drive Belt Replacement
To replace a spare drive belt, be prepared to disconnect
the CV-joint from the left-side gearbox. See Figure 21.
The function of the CVT, (Continuously Variable
Transmission), is to automatically deliver the correct amount
of torque required by the trowel under all load conditions.
This enables the trowel to deliver the necessary torque for
float pan applications and the high rotor speeds required
for burnishing concrete.
NOTICE
It will be necessary to disconnect the CV-Joint from the
left-side gearbox coupler.This means the removal of the
three screws that secure the CV-Joint to the gearbox.
The Driven Pulley is a variable pitch pulley type, (Figure
22) connected by a drive belt.
1. Place the trowel on suitable supports and observe all
safety precautions.
CVT
(Drive
Pulley)
2. Remove Left-side End Grate and open Left "Clamshell"
3. Remove the three screws that secure the CV-joint to
the left-side gearbox coupler.
4. Once the CV-joint has been separated from the left-side
gearbox, push the CV-joint inward so that a gap exists
between the gearbox and the CV-joint (Figure 21).Slide
the spare V-belt between the gearbox coupler and the
CV-joint.Avoid contaminating the replacement belt with
grease or oil when sliding it between the CV-Joint and
gearbox coupler.
Drive V-Belt
Driven
Pulley
Figure 22. CVT with Variable Pitch Drive Pulley
5. Place the spare drive belt inside the drive belt carrier,
and secure the spare belt carrier to the inboard side
of the left gearbox.
Drive Pulley
The Drive Pulley uses centrifugal force (Figure 23 and
Figure 24) to create a belt squeeze force transmitted at the
pulley faces.This condition functions as an automatic clutch.
6. Install the three screws that secure the CV-joint to the
left-side gearbox coupler.
Left Side
Gearbox
RI
F
T
N
U
G
A
E
L
C
F
O
R
C
E
FIXED
FACE
VARIABLE
FACE
DRIVE PULLEY
(CVT)
CV Joint Bolt
Figure 23. Drive Pulley (Centrifugal Force)
New Spare
Drive Belt
Centrifugal force pushes the roller arms (Figure 24) against
the ramp plate, forcing moveable face toward fixed face
squeezing belt.
Figure 21. Spare Drive Belt Replacement
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 31
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Maintenance (OlD Style clutcH)
How It Works (Figure 25)
MOVEABLE FACE
IS CONTROLLED
BY A SPRING
AND BELT TENSION
Condition A:
CENTRIFUGAL FORCE
• Engine Idling
LOW OUTPUT
SPEED
• Drive Pulley: Small
• Driven Pulley: Large
• Belt: Loose and Stationary
Condition B:
DRIVE
PULLEY
DISTANCE
MOVEABLE
FACE
TRAVELS
LOW ENGINE RPM
DRIVEN PULLEY
HIGH OUTPUT
• Engine Accelerating
• Drive Pulley: Small But Increasing
• Driven Pulley: Large But Decreasing
• Belt: Approaching Tightness
Condition C:
MOVABLE FACE IS
CONTROLLED BY
ROLLER WEIGHT ARMS
AND SPRINGS
DRIVE
PULLEY
SPEED
HIGH ENGINE RPM
DRIVEN PULLEY
• Engine At High Speed
• Drive Pulley: Large
• Driven Pulley: Small
• Belt: Tight
Figure 24. Pulley Interaction
The "Variable Pitch Pulleys" have one fixed face, and one
moveable face.The drive pulley moveable face is controlled
by roller weight arms and springs, which change position
according to engine speed. The driven pulley moveable
face is controlled by a spring and belt tension. (Figure 25)
A
B
C
1
2
DRIVE PULLEY
RAMP
PLATE
BUSHING
3
4
5
SPRING
Figure 26. Pulley Conditions
ROLLER ARM
WEIGHT
Figure 25. Variable Pitch Pulley
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Maintenance (OlD Style clutcH)
Clutch
This clutch system provides a high pulley ratio (a low gear-
so to speak) to start out and a low pulley ratio ( a high
gear- so to speak) for a high speed operation, with infinite
variation between the two.
This means that it will not be necessary to give full throttle
in order to "break the blades/pans loose".The machine can
slowly be brought up to speed.
The torque sensitive pulley (Figure 27) utilizes a spring
and cam bracket. Peak performance results from proper
interaction between the driven pulley spring and the ramp
angle of the cam bracket.
SPRING
DRIVEN PULLEY
CAM
BRACKET
FIXED FACE
MOVEABLE
FACE
Figure 27. Pulley Spring and Cam Bracket
NOTICE
If replacement of the clutch is required, use clutch replacement kit, P/N 23447, to upgrade to Multi-Clutch system. New
style drive assembly must be installed per instruction sheet, P/N 23448, included with clutch replacement kit.
Old style Comet clutch is no longer available. Multi-Clutch components are not interchangeable with the prior Hoffco
Comet drive system.The Hoffco Comet CVT system must be replaced for combatibility with the new equipment.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 33
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Maintenance (neW Style clutcH)
The clutch will not shift correctly if the belt width is below
1.14". Measure the CVT belt every 100 hours of use to
make sure it is within the specified tolerance.See Figure 28.
NOTICE
This section is intended to aid users in the maintenance
of drive assemblies with a new style Multi-Clutch.
CVT BELT
CHeCKINgTHe DRIve BeLT
The drive belt needs to be changed as soon as it begins
to show signs of wear. DO NOT reuse a belt under any
circumstances. Indications of excessive belt wear are
fraying, squealing when in use, belts that emit smoke or a
burning rubber smell when in use.
CALIPERS
To gain access to the drive belt, remove the drive belt
guard cover, then visually inspect the drive belt for signs
of damage or excessive wear. If the drive belt is worn or
damaged, replace the drive belt.
Figure 28. Belt Measurement
RemOvINgTHe DRIve BeLT
WaRNINg
1. Remove Left-side End Grate and open Left "Clamshell"
(see Figure 4) to gain access to Drive Belt and Pulleys
(Figure 29)..
DONOTattempttoinserthandsortoolsinto
the belt area while the engine is running and
the safety guard has been removed. Keep
fingers, hands, hair and clothing away from
all moving parts to prevent bodily injury.
Upper (Drive) Pulley
WaRNINg
DO NOT remove the V-belt guard cover
until the muffler has cooled. Allow the entire
trowel to cool down before performing this
procedure.
BeLT meaSuRemeNT
Long life can be expected with this new drive assembly as
long as the belt is kept properly aligned.
Lower (Driven) Pulley
Figure 29. Drive Belt, Belt Holder and Pulleys
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Maintenance (neW Style clutcH)
2. Disconnecttheleft-sideCVAxlefromtheleft-sidegearbox
and the lower drive pulley coupler. See Figure 30.
CLUTCH
UPPER DRIVE
PULLEY/CLUTCH
UPPER
PULLEY
LOWER
DRIVE
PULLEY
CV AXLE
CVT
BELT
GEARBOX
COUPLER
COUPLER
LOWER
PULLEY
Figure 32. Upper Pulley Belt Installation
3. Reconnect left-side CV Axle Assembly. to the left side
gearbox and lower drive pulley coupler. See Figure 30.
LEFT-SIDE
GEARBOX
Figure 30. Remove Left-Side CV Axle
3. If the belt is not being reused (recommended), CUT
the drive belt. Ensure all belt remnants are removed
from the pulleys.
INSTaLLINg DRIve BeLT
1. Place new CVT belt over the lower pulley.Squeeze the
belt (Figure 31) and pull the belt upwards and towards
the rear of the trowel. This will spread open the faces
of the lower drive pulley.
CVT BELT
(P/N 23365)
PULL UPWARDS
AND TOWARDS
REAR OF TROWEL
FIXED
FACE
MOVEABLE
FACE
LOWER
PULLEY
Figure 31. Holding Lower Pulley Open
2. Place free end of CVT belt into upper pulley grooves
See Figure 32.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 35
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Maintenance (neW Style clutcH)
HOW ITWORKS
The Multi-Clutch functions much like a standard CVT system.
As the engine RPM’s increase, the drive or primary clutch
closes, forcing the belt to ride outwards on the drive sheaves.
The closing of the drive clutch also forces the belt to open the
drivenorsecondarysheaves.Theopeningandclosingofthese
sheavescreatesaratiovariation…henceCVTorContinuously
Variable Transmission.
Belt protection is achieved within the Multi-Clutch through
the use of a series of centrifugal clutches.While most CVT
systems have a loose or slack belt while the engine idles,
the sheaves of those systems are constantly rotating and
wearing on the belt.
Those systems also require the stationary belt to be
pinched by the constantly rotating sheaves during startup.
The relative rotation of the sheaves to the belt causes
unnecessary wear on the belt. With traditional CVT
systems, wear on the belt happens any time the engine is
idling and at every start up of the driven equipment.This is
where the Multi-Clutch differs from the other CVT’s.
The Multi-Clutch utilizes two centrifugal clutches (the starter
clutch system) to drive the sheaves of the drive (primary)
clutch.What that means is that the belt can remain tight in
the sheaves, and that both the sheaves and the belt are
stationary while the vehicle is idling.This eliminates the belt
wear at an idle, and during start up, while also providing
one additional form of belt protection.
The centrifugal clutches (starter clutch) can act as overload
protection as well.In cases where too much torque is trying
to be transmitted to the belt, the centrifugals can slip before
the maximum load on the belt is achieved.What this means
is that instead of the belt slipping on the sheaves during
an overload, the centrifugals will first slip further protecting
the belt from damage.
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Maintenance (trOWel)
OPERATING POSITION
Blade pitch
DISENGAGED
(ONE SIDE)
Matching Blade Pitch for Both Sets of Blades
Sometimes it may be necessary to match blade pitch
between the two sets of blades. There are some signs
that this may be necessary. For example, the differences
in pitch could cause a noticeable difference in finish quality
between the two sets of blades, or, the difference in blade
pitch could make the machine difficult to control. This is
due to the surface area in contact with the concrete (the
blade set with the greater contact area tends to stick to the
concrete more).
Single pitch
On a Single Pitch trowel each spider assembly can be
pitched individually, forcing the operator to constantly make
adjustments on each pitch tower.
Twin pitchTM
Trowels equipped with Twin PitchTM Controls may need
to have blade pitch between the two sets of blades
"syncronized". If the blades need to be syncronized this
is easily accomplished by performing the following. Refer
to Figure 33.
Figure 33. Pitch Towers
Blade pitch adjustment procedure
Maintenance adjustment of blade pitch is made by adjusting
a bolt (Figure 34) on the arm of the trowel blade finger.
This bolt is the contact point of the trowel arm to the lower
wear plate on the thrust collar.The goal of adjustment is to
promote consistent blade pitch and finishing quality.
1. Lift the pitch adjustment handle on either side. Once
lifted, that side is now disconnected from the Twin
Pitch system.
2. Adjust to match the opposite side.
3. When adjusted, lower the handle to Twin Pitch
operating position.
Look for the following indications if blades are wearing
unevenly. If so, adjustment may be necessary.
Is one blade is completely worn out while the others
look new?
Does the machine have a perceptible rolling or bouncing
motion when in use?
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Maintenance (trOWel)
Look at the machine while it is running, do the guard
rings “rock up and down” relative to the ground?
too high. Conversely, adjusting bolts that are too low will
not allow the blades to be pitched high enough for finishing
operations.
Do the pitch control towers rock back and forth?
If, after making Blade Pitch adjustments the machine is
still finishing poorly, blades, trowel arms, and trowel arm
bushings may be suspect and should be looked at for
adjustment, wear, or damage. See the following sections.
Spider Plate
Changing Blades
Trowel Lever
(Finger)
It is recommended that ALL the blades on the entire
machine are changed at the same time. If only one or
some of the blades are changed, the machine will not
finish concrete consistently and the machine may wobble
or bounce.
Trowel Arm
1. Place the machine on a flat, level surface. Adjust
the blade pitch control to make the blades as flat as
possible. Note the blade orientation on the trowel arm.
This is important for ride-on trowels as the two sets
of blades counter-rotate. Lift the machine up, placing
blocks under the main guard ring to support it.
Blade Pitch
Adjustment Bolt
Figure 34. Blade Pitch Adjustment Bolt
The easiest and most consistent way to make adjustments
onthetrowelarmfingersistousetheTrowelArmAdjustment
Fixture (P/N 9177).It comes with all the hardware necessary
to properly accomplish this maintenance and instructions
on how to utilize this tool.
2. Remove the bolts and lock washers on the trowel arm,
and then remove the blade.
3. Scrape all concrete and debris from the trowel arm.This
is important to properly seat the new blade.
4. Install the new blade, maintaining the proper orientation
for direction of rotation.
If a trowel arm adjustment fixture is not available and
immediate adjustment is necessary, temporary field
adjustment can be made if you can see or feel which blade
is pulling harder by adjusting the bolt that corresponds to
that blade.
5. Reinstall the bolts and lock washers.
6. Repeat steps 2-5 for all remaining blades.
Steering adjustment
A better way to determine which blades need adjustment
is to place the machine on a known FLAT surface (steel
metal plate) and pitch the blades as flat as possible. Look
at the adjustment bolts.They should all barely make contact
with the lower wear plate on the spider. If you can see that
one of them is not making contact, some adjustment will
be necessary.
The steering assist adjustment should be performed only
by qualified service technicians. For HHX-G5 steering
adjustment instructions, reference MQ Whiteman service
bulletin 200925.
Clean-up
Adjust the“high”bolts down to the level of the one that is not
touching, or adjust the“low”bolt up to the level of the higher
ones. If possible, adjust the low bolt up to the level of the
rest of the bolts.This is the fastest way, but may not always
work.Verify after adjustment the blades pitch correctly.
Never allow concrete to harden on the power trowel.
Immediately after use wash any concrete off the trowel
with water, be careful not to spray a hot engine or muffler.
An old paint brush or broom may help loosen any concrete
that has started to harden.
Blades that are incorrectly adjusted often will not be able
to pitch flat.This can occur if the adjusting bolts are raised
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Maintenance
Figure 36 illustrates the "correct alignment " for a spider
plate (as shipped from the factory).
Trowel arm adjustment
Use the following procedure to check and adjust trowel
arms, and check for worn or damaged components when
it becomes apparent that the trowel is finishing poorly or
in need of routine maintenance.
Trowel Arm
Gearbox
Mounting Bar
Blade
Look for the following indications. Trowel arm alignment,
worn spider bushings or bent trowel arms may the cause.
Are blades wearing unevenly? Is one blade completely
worn out while the others look new?
Does the machine have a perceptible rolling or bouncing
motion when in use?
Surface
Look at the machine while it is running; do the guard
rings “rock up and down” relative to the ground?
Correct Alignment
1. Place the trowel in a FLAT, LEVEL area.
Figure 36. Correct Spider Plate
AlignmentSpider Removal
A level, clean area to test the trowel prior to and after is
essential.Any unlevel spots in the floor or debris under the
trowel blades will give an incorrect perception of adjustment.
Ideally, a 5 x 5 Ft. (1.5 x 1.5 Meter) three-quarter inch (19
mm) thick FLAT steel plate should be used for testing.
Remove the spider assembly from the gearbox shaft as
follows:
1. Locate the cone point square head set screw (Figure
37) and attached jam nut found on the side of the spider
assembly.
2. Pitch the blades as flat as possible. The adjustment
bolts should all barely make contact with the lower
wear plate on the spider. If one is not making contact,
adjustment will be necessary. (Figure 35).
Gearbox
Figure 35 illustrates, "incorrect alignment", worn spider
bushings or bent trowel arms. Check that the adjustment
bolt is barely touching (0.10" max. clearance) lower wear
plate. All alignment bolts should be spaced the same
distance from the lower wear plate.
Gearbox Shaft
Upper Wear Plate
Thrust Collar Bearing
Thrust Collar
Adjustment Bolt
Lower Wear Plate
Thrust Collar Bushing
Lower Wear Plate
Jam Nut
Surface
Dished Effect on
Finished Concrete
Spider Plate
Set Screw (Cone Point,
Square Head)
Figure 35. Incorrect Spider Plate Alignment
Figure 37. Spider/Gearbox Removal
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Maintenance
2. Loosenthejamnutandconepointsquareheadsetscrew.
Spider Plate
3. Carefully lift the upper trowel assembly off of the spider
assembly. A slight tap with a rubber mallet may be
necessary to dislodge the spider from the main shaft
of the gearbox.
Roll Pin
Trowel Blade Removal
Remove the trowel blades by removing the three hex head
bolts (Figure 38) from the trowel arm. Set blades aside.
Trowel Arm
Hex Head Bolt
Lock Washer
Hex Head Bolt
(Zerk Fitting)
Figure 40. Removing Roll Pin and Grease Zerk
Fitting
4. Should the trowel arm inserts (bronze bushing) come
out with the trowel arm, remove the bushing from the
trowel arm and set aside in a safe place.If the bushing
is retained inside the spider plate, carefully remove
the bushing.
Trowel Blade
Figure 38. Trowel Blades
Trowel arm Removal
5. Examine the bronze trowel arm bushing (Figure 41),
and clean if necessary. Replace bushing if out-of-
round or worn.
1. Remove the hardware securing the stabilizer ring to
the trowel arm. (Figure 39)
2. Each trowel arm is held in place at the spider plate
by a hex head bolt (zerk grease fitting) and a roll pin.
Remove both the hex head bolt and the roll pin (Figure
35) from the spider plate.
Bronze Bushing
3. Remove the trowel arm from the spider plate.
Spider Plate
Figure 41. Bronze Bushings
6. Wire brush any build-up of concrete from all six sides
of the trowel arm. Repeat this for the remaining arms.
Figure 39. Stabilizer Ring
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Maintenance
3. Next, check the clearance between the round shaft and
the test surface as one of the flat hex sections of the
arm rests on the test surface. Rotate the arm to each
of the flat hex sections and check the clearance of the
round shaft. Use a feeler gauge of .005" (0.127 mm).
Each section should have the same clearance between
the round of the trowel arm shaft and the test surface.
CheckingTrowel arm Straightness
Trowel arms can be damaged by rough handling, (such
as dropping the trowel on the pad), or by striking exposed
plumbing, forms, or rebar while in operation. A bent trowel
arm will not allow the trowel to operate in a smooth fluid
rotation.If bent trowel arms are suspect, check for flatness
as follows, refer to Figure 42 and Figure 43:
4. If the trowel arm is found to be uneven or bent, replace
the trowel arm.
Lever Mounting Slot
(Left Arm Shown)
Trowel arm adjustment
Roll Pin Hole
Blade Attachment
Bolt Hole (1 of 3)
Shown in (Figure 44) is the adjustment fixture with a trowel
arm inserted. As each trowel arm is locked into the fixture,
the arm bolt is adjusted to where it contacts a stop on the
fixture. This will consistently adjust all of the trowel arms,
keeping the finisher as flat and evenly pitched as possible.
Flat of D-Shaft
(Top of Arm)
1. Locate the trowel arm adjustment tool P/N 9177.
Trowel Arm
Round Shaft Section
Trowel Arm
ADJUSTMENT
BOLT
D-Shaft Section
Figure 42. Trowel Arm
LOCKING
NUT
1. Use a thick steel plate, granite slab or any surface
which is true and flat, to check all six sides of each
trowel arm for flatness.
DISTANCE
2. Check each of the six sides of the trowel arm (hex
section). A feeler gauge of .004" (0.10 mm) should not
pass between the flat of the trowel arm and the test
surface along its length on the test surface.(Figure 43) .
FIXTURE
ARM
SIDE-VIEW
Trowel Arm
Flat Test
Surface
Figure 44. Trowel Arm AdjustmentTool SideView
2. Ensurethefixturearmisinthepropersetting(upordown)
for your trowel arm rotation as shown in Figure 45.
Feeler Gauge
(.005 in./0.127mm)
Feeler Gauge
(.004 in./0.10mm)
Figure 43. Checking Trowel Arm Flatness
Figure 45. Trowel Arm Adjustment Setup
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 41
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Maintenance
Re-assembly
NOTICE
1. Clean and examine the upper/lower wear plates and
thrust collar.Examine the entire spider assembly.Wire
brush any concrete or rust build-up.If any of the spider
components are found to be damaged or out of round,
replace them.
Arms with CLOCK-WISE blade rotation use the fixture
arm in the UP position (A in Figure 45). Arms with
COUNTER CLOCK-WISE blade rotation use the
fixture with the fixture arm in the DOWN position. (B
in Figure 45).
2. Make sure that the bronze trowel arm bushing is not
damage or out of round.Clean the bushing if necessary.
If the bronze bushing is damaged or worn, replace it.
3. Unscrew the locking bolts on the adjustment tool and
place the trowel arm into the fixture channel as shown
in Figure 46 A thin shim may be required to cover the
blade holes on the trowel arm. Make sure to align the
trowel adjustment bolt with the fixture adjustment bolt.
3. Reinstall bronze bushing onto trowel arm.
4. Repeat steps 2 -3 for each trowel arm.
TROWEL
ARM
LEVER
5. Make sure that the spring tensioner is in the correct
position to exert tension on the trowel arm.
ARM
FIXTURE
ARM
ADJ.
BOLT
6. Insert all trowel arms with levers into spider plate (with
bronze bushing already installed) using care to align
grease hole on bronze bushing with grease hole fitting
on spider plate.
SHIM
ADJ.
BOLT
7. Lock trowel arms in place by tightening the hex head
bolt with zerk grease fitting and jam nut.
LOCKING
BOLTS
8. Re-install the blades onto the trowel arms.
9. Install stabilizer ring onto spider assembly.
DISTANCE
.010 INCH
TROWEL ARM
ADJUSTMENT
FIXTURE
P/N 1817
10. Lubricate all grease points (zerk fittings) with premium
"Lithum 12" based grease, conforming to NLG1 Grade
#2 consistency.
Figure 46. Trowel Arm Adjustment Fixture
Components
Installing pans Onto Finisher Blades
These round discs sometimes referred to as "pans" attach
to the spiders arms and allow early floating on wet concrete
and easy movement from wet to dry areas. They are also
very effective in embedding large aggregates and surface
hardeners.
4. Use an allen wrench to tighten the locking bolts
securing the trowel arm in place.
5. Adjust the bolt "distance" shown in Figure 44 to match
one of the arms. The other arms will be adjusted to
match this distance.
WaRNINg
6. Loosen the locking nut on the trowel arm lever, then
turn the trowel arm adjusting bolt until it barely touches
(.010") the fixture adjusting bolt.
Lifting/Crush Hazard.DO NOT lift trowel with
pans attached.
7. Once the correct adjustment is made, tighten the lock
nut on the trowel arm to lock in place.
WaRNINg
8. Loosen locking nuts on the adjustment fixture, and
remove trowel arm.
ALWAYS install pans either on the work area or on an
area that is next to and level with the work area. DO
NOT lift the trowel when the pans are attached.
9. Repeat steps for the remaining trowel arms.
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Maintenance
Refer to Figure 47 when installing pans onto finisher blades.
Checking Steering pressure
Tie-Down Knob
Tie-Down,
Blade
CauTION
This procedure will require two or more people.
The trowel will need to be "run up" while remaining
stationary or otherwise held in position. If a "hover" is
difficult to maintain the trowel can be butted up to 2 or
3 stakes or to some other none-moveable items.
1. Remove the Left Side Access Cover and insert the test
pressure gauge (300 to 600 PSI) as shown in Figure
48 into the left steering valve's diagnostic quick coupler.
2. Verify the hydraulic fluid level is correct.
3. Start the engine and allow the unit to warm up.
4. Move the throttle lever to FULL engine RPM.
5. View the guage and record the reading.
Interpreting the pressure Reading
WaRNINg
Blade Assembly
Z-Clip, Pan
Figure 47. Z-Clip Finisher Pan Installation
1. Lift trowel just enough to slide pan under blades.Lower
finisher onto pan with blades assembly adjacent to
Z-Clips.
Charge/Steering Pressure must NEVER exceed 300
PSI nor go below 150 PSI. Pressure too high may result
in pressure leaks while pressure too low may result in
system damage.
2. Rotate blades into position under Z-Clips. Ensure that
the blades are rotated in the direction of travel when
the machine is in operation or use the engine to rotate
the blades into position.
3. Attach the blade tie-downs to the far side of the Z-Clip
brackets with tie-down knobs as shown in Figure 47.
4. Check to make certain that the blade edges are
secured under the Z-Clips and the tie-downs are
secured completely over the edges of the blade bar
before the machine is put back into operation.
Hydraulic Steering pressure
WaRNINg
NEVER use your hand to find hydraulic leaks. Use a
piece of wood or cardboard. Hydraulic fluid injected into
the skin must be treated by a knowledgable physician
immediately or severe injury or death can occur.
Many hydraulic problems are a result of low fluid levels.
Before checking any other possibilities, make sure the
hydraulic fluid is at the proper level in the hydraulic fluid tank.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 43
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Maintenance
Steering pressure adjustment
150
100
50
200
250
300
bar
psi
5000
WIKA
Figure 48. Steering Pressure Check
The left steering valve's factory setting is 230 PSI, however
some operators may prefer a more responsive steering
(higher pressure required; 300 PSI maximum) and some
operators may prefer a "softer feel" (lower pressure
required; not less than150 PSI)
Figure 49. Steering Pressure Adjustement
Remember, the trowel will need to be kept stationary during
"run-up" while checking the pressure.
1. Remove front grille guard.
2. Loosen jam nut on pilot relief valve (Figure 49).
3. Use allen wrench to adjust the steering pressure to
the desired setting. (between 150 and 300 PSI) See
Checking Steering pressure procedures.
4. Retighten jam nut.
5. Remove pressure guage and reinstall access grilles.
page 44 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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DecOMMiSSiOninG trOWel
DecommissioningTrowel/Components
Decommissioning is a controlled process used to safely
retire a piece of equipment that is no longer serviceable.
If the equipment poses an unacceptable and unrepairable
safety risk due to wear or damage or is no longer cost
effective to maintain, (beyond life-cycle reliability) and is
to be decommissioned, (demolition and dismantlement),
the following procedure must take place:
1. Drain all fluids completely. These may include oil,
gasoline, hydraulic oil and antifreeze. Dispose of
properly in accordance with local and governmental
regulations. Never pour on ground or dump down
drains or sewers.
2. Remove battery and bring to appropriate facility for lead
reclamation. Use safety precautions when handling
batteries that contain sulfuric acid, (See “Safety
Information” Section).
3. The remainder can be brought to a salvage yard or
metal reclamation facility for further dismantling.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 45
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WirinG DiaGraM (enGine)
1
2
3
4
C
RIGHT FRONT
LIGHT
RIGHT-SIDE
LEFT-SIDE
RIGHT-SIDE
RETARDANT SPRAY
SWITCH
LEFT-SIDE
RETARDANT SPRAY
PUMP MOTOR
RETARDANT SPRAY
PUMP MOTOR
RETARDANT SPRAY
SWITCH
P14
2
5
BLK
BLK
2
1
DS1
WHT
RED
1
PUMP
PUMP
MOTOR
MOTOR
RIGHT
LIGHT
D
P9
2
6
7
BLK
WHT
BLK
2
1
DS2
M
F
F
M
F
F
RED
1
1
1
2
2
1
1
2
2
M
M
RIGHT REAR
LIGHT
E
A
P13
P17
B
P10
2
BLK
BLK
BLK
WHT
BLK
2
1
DS3
RED/YEL
RED/YEL
RED
1
GND
GND
LEFT FRONT
LIGHT
F
P18
2
8
BLK
BLK
WHT
2
1
RED
DS4
RED
1
RED +12VDC
SPLICE
LEFT
LIGHT
SPLICE
BLK 10 AWG
G
P19
2
FUSE
BLOCK
F1
9
BLK
BLK
WHT
GND
IGNITION
SWITCH
2
1
DS5
RED
36
20
1
K1-1 NC
87A
NC
6
LEFT REAR
LIGHT
10A
F3
H
P20
2
IG
RED 10 AWG
5
1
30
10
21
4
BLK
BLK
WHT
ST
3
2
1
DS6
K1
COMMON
K1-2 NO
87
B
CONNECT TO
CHASSIS GROUND
RED
1
2
10A
F5
22
WHITE
PURPLE
HOUR
METER
SPLICE
LIGHT SWITCH
11
19
RED (86)
10A
F6
YELLOW
J1-1
GND
BLK
RED 10 AWG
RED
K
23
24
25
35
RED
K1
10A
MAIN RELAY
34
J1-2
F7
10A
F4
COIL
BLACK (85)
ENGINE
STATUS
INDICATOR
RED 10 AWG
RED 10 AWG
30A
F2
18
SPLICE
RED
P6
OIL PRESSURE
SWITCH
I
1
4
2
5
3
6
12
NC
B
ST
BLK
GRAY
ORANGE
30A
1
4
2
5
3
6
P7
STARTER
YELLOW
N
P4
4
1
3
2
33
J
GND
G
F
E
I
TEMPERATURE
SWITCH
13
BLK
BLK
BLK
IGNITION
MODULE
M
P2
GND
BATTERY
32
26
GND
C
D
A
B
J
5
4
1
2
6
3
SPARK PLUGS
GND
1
2
1
2
FUEL
PUMP
14
SEAT
KILL
SWITCH
RED
GND
17
FUEL
SHUT-OFF
SOLENOID
BLK
15
COIL 1
29
COIL 2
COIL 3
BLK
PURPLE
RED
ENGINE
SPEED
SENSOR
F
M
27
30
31
L
P15
GREEN
BLUE
BLACK
GREEN
1
2
1
2
16
RED
ALTERNATOR
SPLICE
BLUE/WHITE (CHARGE LAMP)
RED
28
F8
50A
RED 10 AWG
ALL WIRES ARE 16 AWG EXCEPT WHERE NOTED.
B
page 46 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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WirinG DiaGraM (enGine)
23
24
20
21
35
25
26
1
22
34
11
19
18
28
36
3
17
13
15
27
12
7
29
30
31
6
14
16
32
2
33
10
5
4
9
CONNECTOR ORIENTATION
(FRONT VIEW)
8
2
1
1
2
4
1
5
2
6
3
A
B
I
J
C
F
D
G
E
H
RELAY ORIENTATION
87a 87
85
87
1
2
87a
1
4
2
5
3
6
1
3
2
4
30
85
86
30
86
L
M
N
K
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 47
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trOuBleSHOOtinG
Troubleshooting (Ride-OnTrowel)
possible problem
Symptom
Solution
Make sure that the stop switch is functioning when the
operator is seated. Replace switch if necessary.
Stop switch malfunction?
Look at the fuel system. Make sure there is fuel being
supplied to the engine. Check to ensure that the fuel
filter is not clogged.
Engine running rough or not at all.
Fuel?
Check to ensure that the ignition switch has power and
is functioning correctly.
Ignition?
Bad contacts?
Replace switch.
Safety stop switch not functioning.
Loose wire connections?
Other problems?
Check wiring. Replace as necessary.
Consult engine manufacturer’s manual.
Make sure blades are in good condition, not excessively
worn. Finish blades should measure no less than 2
inches (50mm) from the blade bar to the trailing edge,
combo blades should measure no less that 3.5 inches
(89mm).Trailing edge of blade should be straight and
parallel to the blade bar.
Blades?
Check that all blades are set at the same pitch angle
as measured at the spider. A field adjustment tool
is available for height adjustment of the trowel arms
(contact Parts Department).
Pitch Adjustment?
Bent trowel arms?
Check the spider assembly for bent trowel arms. If one
of the arms is even slightly bent, replace it immediately.
Trowel bounces, rolls concrete, or makes uneven
swirls in concrete.
Check the trowel arm bushings for tightness.This can
be done by moving the trowel arms up and down. If
there is more than 1/8 inch (3.2 mm) of travel at the
tip of the arm, the bushings should be replaced. All
bushings should be replaced at the same time.
Trowel arm bushings?
Thrust collar?
Check the flatness of the thrust collar by rotating it on
the spider. If it varies by more than 0.02 inch (0.5 mm)
replace the thrust collar.
Check the thrust collar by rocking it on the spider. If it
can tilt more than 1/16 inch (1.6 mm) - as measured at
the thrust collar O.D., replace the bushing in the thrust
collar.
Thrust collar bushing?
Thrust bearing worn?
Main shaft?
Check the thrust bearing to see that it is spinning freely.
Replace if necessary.
The main output shaft of the gearbox assembly should
be checked for straightness.The main shaft must run
straight and cannot be more than 0.003 inch (0.08 mm)
out of round at the spider attachment point.
Machine has a perceptible rolling motion while
running.
Check to make sure that both fingers of the yoke press
evenly on the wear cap. Replace yoke as necessary.
Yoke?
Check to ensure that each blade is adjusted to have the
same pitch as all other blades. Adjust per maintenance
section in manual.
Blade Pitch?
page 48 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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trOuBleSHOOtinG
Troubleshooting (Ride-OnTrowel) - continued
possible problem
Symptom
Solution
Check all electrical connections in the lighting circuit.
Verify wiring is in good condition with no shorts. Replace
defective wiring or components immediately.
Wiring?
If +12VDC is present at light fixture connector when light
switch is activated and light does not turn on, replace
light bulb.
Lights?
Lights (optional) not working.
Check the continuity of light switch. Replace light switch
if defective.
Bad switch?
Bad fuse?
Retardant?
Check fuse. Replace fuse if defective.
Check retardant level in tank. Fill tank as required.
Check all electrical connections in the spray pump
circuit.Verify wiring is in good condition with no shorts.
Replace defective wiring or components immediately.
Wiring?
Check the continuity of both left and right spray switches
(palm handles). Replace spray switch if defective..
Retardant spray (optional) not working.
Bad switch?
Bad spray pump?
If +12VDC is present at pump connector when spray
switch is activated and pump does not operate, replace
spray pump.
Bad fuse?
Check fuse. Replace fuse if defective.
See section on blade speed adjustment.
Blade speed out of adjustment?
Check to ensure free movement of hydraulic drive
motors.
Pivots?
Steering is unresponsive.
Check to ensure that hydraulic pressure is adequate.
See section on checking hydraulic pressure.
Hydraulic pressure?
Operating position is uncomfortable.
Seat adjusted for operator?
Broken pitch tower components?
Adjust seat with lever located on the front of the seat.
Inspect all pitch tower components. Replace all defective
components immediately.
Linkage on Twin Pitch Tower not working.
Defective drive pitch cable?
Worn belts?
Inspect drive pitch cable. Replace if defective or broken.
Replace belt.
Adjust per instructions in maintenance section of this
manual.
Clutch out of adjustment?
Worn or defective clutch parts?
Replace parts as necessary.
Clutch slipping or sluggish response to engine
speed change.
Rotate input shaft by hand. If shaft rotates with difficulty,
check the input and output shaft bearings. Replace as
necessary.
Worn bearings in gearbox?
Verify that the gearbox shaft rotates when the input shaft
is rotated. Replace both the worm and worm gear as a
set.
Worn or broken gears in gearbox?
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 49
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trOuBleSHOOtinG
Troubleshooting (engine)
possible problem
Symptom
Solution
Spark plug bridging?
Check gap, insulation or replace spark plug.
Clean or replace spark plug.
Carbon deposit on spark plug?
Short circuit due to deficient spark plug
insulation?
Check spark plug insulation, replace if worn.
Improper spark plug gap?
Fuel reaching carburetor?
Water in fuel tank?
Set to proper gap.
Check fuel line.
Flush or replace fuel tank.
Replace fuel filter.
Fuel filter clogged?
Stuck carburetor?
Check float mechanism.
Check transistor ignition unit.
Difficult to start, fuel is available, but no spark
at spark plug.
Spark plug is red?
If insufficient compression, repair or replace
engine. If injected air leaking, correct leak. If
carburetor jets clogged, clean carburetor.
Spark plug is bluish white?
Check transistor ignition unit is broken, and
replace defective unit. Check if voltage cord
cracked or broken and replace. Check if
spark plug if fouled and replace.
No spark present at tip of spark plug?
No oil?
Add oil as required.
Oil pressure alarm lamp blinks upon starting? Check automatic shutdown circuit, "oil
(if applicable)
sensor". (if applicable)
ON/OFF switch is shorted?
Ignition coil defective?
Improper spark gap, points dirty?
Check switch wiring, replace switch.
Replace ignition coil.
Difficult to start, fuel is available, and spark is
present at the spark plug.
Set correct spark gap and clean points.
Condenser insulation worn or short circuiting? Replace condenser.
Spark plug wire broken or short circuiting?
Wrong fuel type?
Replace defective spark plug wiring.
Flush fuel system, and replace with correct
type of fuel.
Difficult to start, fuel is available, spark is
present and compression is normal.
Water or dust in fuel system?
Air cleaner dirty?
Flush fuel system.
Clean or replace air cleaner.
Close choke.
Choke open?
Suction/exhaust valve stuck or protruded?
Piston ring and/or cylinder worn?
Reseat valves.
Replace piston rings and/or piston.
Difficult to start, fuel is available, spark is
present and compression is low.
Cylinder head and/or spark plug not tightened
properly?
Torque cylinder head bolts and spark plug.
Head gasket and/or spark plug gasket
damaged?
Replace head and spark plug gaskets.
Fill with correct type of fuel.
No fuel in fuel tank?
Apply lubricant to loosen fuel cock lever,
replace if necessary.
Fuel cock does not open properly?
No fuel present at carburetor.
Fuel filter/lines clogged?
Fuel tank cap breather hole clogged?
Air in fuel line?
Replace fuel filter.
Clean or replace fuel tank cap.
Bleed fuel line.
page 50 — HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10)
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trOuBleSHOOtinG
Troubleshooting (engine) - continued
possible problem
Symptom
Solution
Clean or replace air cleaner.
Check float adjustment, rebuild carburetor.
Clean or replace spark plug.
Set to proper gap.
Air cleaner dirty?
Improper level in carburetor?
Defective spark plug?
Weak in power, compression is proper and
does not misfire.
Improper spark plug?
Flush fuel system and replace with correct
type of fuel.
Water in fuel system?
Weak in power, compression is proper but
misfires.
Dirty spark plug?
Clean or replace spark plug.
Replace ignition coil.
Ignition coil defective?
Spark plug heat value incorrect?
Wrong type of fuel?
Replace with correct type of spark plug.
Replace with correct type of fuel.
Clean cooling fins.
Cooling fins dirty?
Engine overheats.
Clear intake of dirt and debris. Replace air
cleaner elements as necessary.
Intake air restricted?
Oil level too low or too high?
Governor adjusted incorrectly?
Governor spring defective?
Fuel flow restricted?
Adjust oil to proper level.
Adjust governor.
Rotational speed fluctuates.
Replace governor spring.
Check entire fuel system for leaks or clogs.
Recoil mechanism clogged with dust and
dirt?
Clean recoil assembly with soap and water.
Replace spiral spring.
Recoil starter malfunctions. (if applicable)
Spiral spring loose?
Ensure tight, clean connections on battery
and starter.
Loose, damaged wiring?
Starter malfunctions.
Battery insufficiently charged?
Recharge or replace battery.
Replace starter.
Starter damaged or internally shorted?
Check and clean valves. Check muffler and
replace if necessary.
Over-accumulation of exhaust products?
Wrong spark plug?
Burns too much fuel.
Replace spark plug with manufacturer's
suggested type.
Lubricating oil is wrong viscosity?
Worn rings?
Replace lubricating oil with correct viscosity.
Replace rings.
Exhaust color is continuously "white".
Air cleaner clogged?
Clean or replace air cleaner.
Adjust choke valve to correct position.
Choke valve set to incorrect position?
Carburetor defective, seal on carburetor
broken?
Exhaust color is continuously "black".
Replace carburetor or seal.
Poor carburetor adjustment, engine runs too
rich?
Adjust carburetor.
ON/OFF device not activated ON?
Battery disconnected or discharged?
Ignition switch/wiring defective?
Turn on ON/OFF device.
Check cable connections. Charge or replace
battery
Will not start, no power with key "ON". (if
applicable)
Replace ignition switch. Check wiring.
HHXg5 RIDe-ONTROWeL • OpeRaTION maNuaL — Rev. #1 (10/25/10) — page 51
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OperatiOn 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
Mayco Parts
Warranty Department
800-306-2926
310-537-3700
Fax: 800-672-7877
Fax: 310-637-3284
800-421-1244, Ext. 279
310-537-3700, Ext. 279
Fax: 310-537-1173
Fax: 310-631-5032
Service Department
Technical Assistance
800-421-1244
310-537-3700
Fax: 310-537-4259
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
Fax: (52) 222-285-0420
Unit 2, Northpoint Industrial Estate, Tel: 0161 339 2223
Global 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 2010, MULTIQUIP INC.
Multiquip Inc, the MQ logo and the Whiteman 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.
Your Local Dealer is:
pn: 23110
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