OPERATION AND PARTS MANUAL
SERIES
MODEL HHN-31VMODEL HHN-31V
MODEL HHN-31V
MODEL HHN-31VMODEL HHN-31V
RIDE-ON POWER TROWEL
(B & S VANGUARD GASOLINE ENGINE)
Revision # 5 (03/02/07)
To find the latest revision of this
publication, visit our website at:
www.multiquip.com
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
P/N 20382
Engine exhaust and some of
its constituents, and some dust created
by power sanding, sawing, grinding,
drillingand other constructionactivities
contains chemicals known to the State
of California to cause cancer, birth
defects and other reproductive harm.
Some examples of these chemicals are:
Leadfromlead-based paints.
Crystallinesilica frombricks.
Cementand other masonryproducts.
Arsenicandchromiumfromchemically
treatedlumber.
Your risk from these exposures varies,
dependingon howoftenyoudo thistype
of work. To reduce your exposure to
these chemicals: work in aALWAYS
well ventilated area, and work with
approved safety equipment, such as
dust masks that are specially designed
to filter out microscopic particles.
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.
WARNING
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.
TABLE OF CONTENTS
MQ WHITEMAN — HHN-31V
GASOLINE POWERED RIDE-
ON TROWEL
Proposition 65 Warning ............................................ 2
Silicosis/Respiratory Warnings ................................. 3
Table Of Contents .................................................... 4
Training Checklist ..................................................... 5
Daily Pre-Operation Checklist .................................. 6
Parts Ordering Procedures ...................................... 7
Rules For Safe Operation .....................................8-9
Operation And Safety Decals ................................. 10
Specifications ......................................................... 11
General Information ............................................... 12
Controls and Indicators ..................................... 13-14
New Machine Setup Instructions ........................... 15
Initial Start-Up ...................................................16-18
Maintenance ..................................................... 19-24
Troubleshooting ................................................25-26
Explanation Of Codes In Remarks Column ........... 27
Suggested Spare Parts .......................................... 28
Name Plate And Decals ....................................30-31
Pivot/Gear Box-Right-Side Assy. ....................... 32-33
Pivot/Gear Box-Left-Side Assy. .........................34-35
Gearbox Assy. ................................................... 36-37
Control Steering (Assist) Assy........................... 38-41
Twin Pitch Assy. (Left/Right) ..............................42-45
Drive Assy. ........................................................ 58-59
5-Blade Spider Assy. (Left) ............................... 60-61
5-Blade Spider Assy. (Right) .............................62-63
Stabilizer Ring Assy. ........................................... 64-65
Seat and Frame Assy. ........................................ 66-67
Frame and Components .................................... 68-69
Foot Pedals Assy. ............................................... 70-71
Throttle Foot Pedal Assy. ................................... 72-73
Battery Assy. ...................................................... 74-75
Spray Assy. ........................................................ 76-77
Front Panel Assy. ............................................... 78-79
Top Right Panel Assy.......................................... 80-81
E-Z Mover and Lift ............................................. 82-83
Wiring Diagram ....................................................... 84
Terms and Conditions Of Sale — Parts .................. 85
NOTE
Specifications and part
numbers are subject to
change without notice.
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 4
PAGE 4 — HTN 31V
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
operator’s.
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HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 5
DAILY PRE-OPERATION CHECKLIST
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HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 6
PAGE 6 — HTN 31V
Effective: January 1st, 2006
Ordering parts has never been easier!
PARTS ORDERING PROCEDURES
Choose from three easy options:
Best Deal!
Order via Internet (Dealers Only):
Order parts on-line using Multiquip’s SmartEquip website!
■
View Parts Diagrams
■
Order Parts
■
Print Specification Information
Goto www.multiquip.com and click on
Order Parts
to log in and save!
Order via Fax (Dealers Only):
All customers are welcome to order parts via Fax.
Domestic (US) Customers dial:
1-800-6-PARTS-7 (800-672-7877)
Order via Phone:
Non-Dealer Customers:
Contact your local Multiquip Dealer for
parts or call 800-427-1244 for help in
locating a dealer near you.
If you have an MQ Account, to obtain a
Username and Password, E-mail us at:
parts@multiquip.com.
To obtain an MQ Account, contact your
District Sales Manager for more information.
internet
Use the
on
Standard orders
complete part numbers.*
Fax
your order in and qualify for a 2% Discount
on
Standard orders
complete part numbers.*
Domestic (US) Dealers Call:
1-800-427-1244
and qualify for a 5% Discount
for all orders which include
for all orders which include
International Customers
their local Multiquip Representatives for
Parts Ordering information.
Note: Discounts Are Subject To Change
Note: Discounts Are Subject To Change
should contact
When ordering parts, please supply:
❒❒
❒
Dealer Account Number
❒❒
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❒
Dealer Name and Address
❒❒
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❒
Shipping Address (if different than billing address)
❒❒
❒❒
❒
Return Fax Number
❒❒
❒❒
❒
Applicable Model Number
❒❒
❒❒
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Quantity, Part Number and Description of Each Part
❒❒
NOTE
www.multiquip.com
All orders are treated as
and will ship the same day if received prior
to 3PM PST.
WE ACCEPT ALL MAJOR CREDIT CARDS!
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 7
❒❒
❒
Specify Preferred Method of Shipment:
❒❒
✓
UPS/Fed Ex
■
■
■ Next Day
■
Standard Orders
Priority One
Ground
Second/Third Day
✓ DHL
✓
Tr u c k
HHN-31V— RULES FOR SAFE OPERATION
■
CAUTION:
Failure to follow instructions in this manual may
lead to serious injury or even death! This
equipment is to be operated by trained and
qualified personnel only! This equipment is for
industrial use only.
The following safety guidelines should always be used when
operating the trowel.
GENERAL SAFETY
■
DO NOT operate or service this equipment
before reading this entire manual.
■
This equipment should not be operated by persons under
18 years of age.
■
NEVER operate this equipment without
proper protective clothing, shatterproof
glasses, steel-toed boots and other
protective devices required by the job.
NEVER touch the hot exhaust
manifold, muffler or cylinder. Allow
these parts to cool before servicing
engine or trowel.
■
High Temperatures – Allow the engine to cool before adding
fuel or performing service and maintenance functions. Contact
hot
with
■
The ride-on trowel engine requires an adequate free flow of
cooling air. Never operate the ride-on trowel in any enclosed
or narrow area where free flow of the air is restricted. If the air
components can cause serious burns.
flow is restricted it will
cause serious damage to
the trowel or engine and
may cause injury to
people. Remember the
trowel's engine gives off
DEADLY carbon monoxide
gas.
■
NEVER operate this equipment when not
feeling well due to fatigue, illness or
taking medicine.
■
NEVER operate this equipment under
the influence or drugs or alcohol.
■
NEVER use accessories or attachments, which are not
recommended by Multiquip for this equipment. Damage to
the equipment and/or injury to user may result.
■
Manufacturer does not assume responsibility for any accident
due to equipment modifications.
■
Whenever necessary, replace nameplate, operation and
safety decals when they become difficult read.
■
Always check the machine for loosened threads or bolts
before starting.
■
■
■
Always refuel in a well-ventilated area, away from sparks
and open flames.
n Always use extreme caution when
working with flammable liquids. When
refueling, stop the engine and allow it
to cool. DO NOT
the trowel. Fire or explosion could result
from fuel vapors, or if fuel is spilled on a
hot engine.
NEVER operate the trowel in an explosive atmosphere or
near combustible materials. An explosion or fire could result
causing severe
Topping-off to filler port is dangerous, as it tends to spill fuel.
bodily harm or even death.
smoke around or near
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 8
PAGE 8 — HTN 31V
HHN-31V— RULES FOR SAFE OPERATION
The following safety guidelines should always be used when
operating the HHN Ride-on Power Trowel:
GENERAL SAFETY
■
DO NOT operate this equipment unless all guards and safety
devices are attached and in place.
■
Always use proper heavy lifting techniques when moving
equipment. This ride-on trowel is very heavy. It should be
lifted only with a lifting device (i.e. crane, forklift, etc.) with a
lifting capacity of at least one ton.
■
Always check to make sure that the operating area is clear
before starting the engine.
■
Always test the safety kill switch before operating the
equipment.
■
NEVER place your feet inside the guard rings while starting
or operating this equipment.
■
Always keep clear of rotating or moving parts while operating
this equipment.
■
NEVER leave the machine unattended while running.
■
Always refuel in a well-ventilated area, away from sparks
and open flames.
MAINTENANCE SAFETY
■
Disconnect the battery and spark plug wires before attempting
any type of service.
■
Securely support any machine components that must be
raised.
■
NEVER lubricate components or attempt service on a running
machine.
■
Always allow the machine a proper amount of time to cool
before servicing.
■
Keep the machinery in proper running condition.
■
Make sure that there is no buildup of concrete, grease, oil or
debris on the machine.
■
Fix damage to the machine immediately and always replace
broken parts.
■
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.
■
Moving Parts - Shut down the engine and disconnect battery
before performing service or maintenance functions. Contact
with moving parts can cause serious injury.
Moving the Ride-On Trowel
CAUTION:
CAUTION:
Temperatures
■
High Temperatures – Allow the machine
and engine to cool before adding fuel or
performing service and maintenance functions.
hot
Contact with
serious burns.
CAUTION:
Emergencies
■
extinguisher
location of the nearest telephone. Also know
the phone numbers of the nearest
doctor
will be invaluable in the case of an emergency.
Always know the location of the nearest
and
components can cause
and
first aid kit
fire department
. Know the
ambulance
. This information
The HHN series Ride-on Power Trowel is designed to be moved
and handled several ways.
The easiest way to lift the ride-on 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 (Figure 3, Page 11).
fire
A strap or chain can be attached to these lift loops, allowing a
forklift or crane to lift the ride-on trowel up onto a slab of concrete.
The strap or chain should have a minimum 2,000 pounds (1000-
,
kg) lifting capacity and the lifting gear must be capable of lifting
at least this amount.
This ride-on trowel is very
awkward to move around. Use proper heavy
lifting procedures and DO NOT attempt to lift
the ride-on trowel by the guard rings.
heavy
and
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 9
HHN-31V— OPERATION AND SAFETY DECALS
Machine Safety Decals
The HHN series Ride-on Power Trowel is equipped with a number of safety decals. These decals are provided for operator safety
and maintenance information. Table 1 below illustrates these decals as they appear on the machine. Should any of these decals
become unreadable, replacements can be obtained from your dealer.
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 10
PAGE 10 — HTN 31V
HHN -31V — SPECIFICATIONS
Figure 1. HHN Dimension Specifications
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s/m(2)
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)daoLlluF(noitpmusnoCleuF RH-PHB/BL45.0
yticapaCrotaidaR .LAG0.1
NOTE:
1. This value does not include seat height. To obtain total
height (seat ) add 4 inches (10.2 cm.).
2. 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
3. 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 “
circumstances. Values were obtained from all three axes
of motion. The values shown represent the maximum RMS
value from these measurements.
protection is always recommended.
)711(0.64
59
)5.2(0.8<
normal
”
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 11
HHN -31V — GENERAL INFORMATION
HHN RIDE-ON TROWEL FAMILIARIZATION
The HHN series Ride-On Power Trowel is designed for the
floating and finishing of concrete slabs.
Take a walk around the HHN Ride-On Power Trowel. Take notice
of all the major components (see Figures 2 and 3, pages 13 and
14) like the engine, blades, air cleaner, fuel system, fuel shut-off
valve, ignition switch etc. Check that there is always oil in the
engine, and gear oil in the gear box assembly.
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 HHN
Ride-On Power Trowels.
Look at the operator control levers. Grab the control levers and
move them around a bit. Look to see how moving the control
levers causes the gearboxes and frame to move.
Notice the foot pedal which controls the engine 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.
Before using your HHN Ride-On Power 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.
Engine
Gearboxes
The HHN Ride on Power Trowel consist of two separate gearbox
assemblies that are enclosed in rugged cast aluminum gear
cases.
The gearbox casing holds 50% more oil capacity than
competitors, which allows more lubrication to be provided to
critical points.
Steering Assist
Dual control levers located in front of the operator's seat are
provided for steering the HHN Ride on Power Trowel. The control
levers are linked to two spring loaded cylinders.
Push the left control lever forward and pull the right control lever
backward and the trowel will rotate clockwise on approximately
a center axis. Pull the left control lever backward and push the
right control lever forward and the trowel will rotate
counterclockwise. See Table 3 on page 15 for a complete
description on the control levers directional positioning.
Constant Velocity Joints (CV-Joints)
Constant velocity joints insure the efficient transfer of power to
the drive shaft and maintain the timing of the gearboxes without
any chance of slippage.
Training
For training, please use the “TRAINING CHECKLIST” located
in the front of this manual (Page 5). This checklist is not intended
to be a substitute for proper training but will provide an outline
for an experienced operator to provide training to a new operator.
The HHN Ride-On Power Trowel is equipped with a liquid cooled
31 HP Vanguard 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
from Whiteman. Please contact your nearest Multiquip Dealer
for a replacement should the original manual disappear.
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) and finish (6 inches wide).
The HHN ride-on power trowels are equipped with five blades
per rotor equally spaced in a radial pattern and attached to a
vertical rotating shaft by means of a
Figures 2 and 3 show the location of the controls, indicators and
general maintenance parts. Each control may perform more than
one function. The functions of each control or indicator is on
pages 13 and 14.
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 12
spider assembly.
PAGE 12 — HTN 31V
HHN -31V — CONTROLS AND INDICATORS
1. Seat – Place for operator to sit. Engine will not start unless
operator is seated. Seat is adjustable, fore and aft for
operator comfort.
2. Steering Control Lever (right side) -Allows the unit to
move in either a forward, reverse left or right direction.
3. Retardant Spray Control Buttons – When pressed
allows retardant spray to flow through the spray nozzle
located at the front of the machine.
4. Twin Pitch Control – Adjusts the blade pitch for right side
of the trowel. Turn the crank as marked on its top surface to
increase or decrease blade pitch.
5. Twin Pitch Control – Adjusts the blade pitch for left side
of the trowel. Turn the crank as marked on its top surface to
increase or decrease blade pitch.
6. Steering Control Lever (left side) -Allows the unit to move
in either a forward, reverse left or right direction.
7. Light Switch – When activated, turns on four halogen
lights. Lights offer better visibility when working indoors.
8. Ignition Switch – With key inserted turn clockwise to
start engine.
9. Oil Indicator Light - Lights red when oil pressure is low.
10. Water Indicator Light - Lights red when water temperature
is high.
11. Charge Indicator - Lights red when electrical system is
not charging properly.
12. Hour Meter - Indicates number of hours the key switch is
in the "ON" position.
13. Choke Control Lever. - In cold weather pull this lever
forward about half way to start engine. After engine warms
push knob all the way in.
14. Fuel Gauge/Filler Cap - Indicates the amount of fuel in
the fuel tank. Remove this cap to add fuel.
15. Fuel Tank - Holds 5 gallons of unleaded gasoline.
16. Spare Belt Carrier - Contains a spare belt. Belt is used on
the drive pulley.
17. Left Foot Riser – Operator foot rest pedal.
18. Spray Nozzles – Spray nozzle for retardant.
19. Right Foot Pedal – Controls blade speed. Slow blade
speed is accomplished by slightly depressing the foot pedal.
Maximum blade speed is accomplished by fully depressing
the foot pedal.
20. EZ- Mover Boss – Front -side insertion point for EZ Mover.
Used when the transporting of the trowel is required.
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 13
Figure 2. HHN Controls and Indicators (Front)
HHN -31V — CONTROLS AND INDICATORS
21. Radiator/Filler Cap – Holds coolant or water necessary to
keep engine at a safe operating temperature. Remove this
cap to add water or antifreeze. DO NOT revove this cap
when the engine is warm.
22. Lift Loops – Located on both the left and right sides of the
main frame. Used when the trowel must be lifted onto a
concrete slab.
23. Lights – Four 12 volt halogen lights are provided with this
unit.
24. Right-Side Spider – Consists (basic) of trowel arms,
blades, wear plate, and thrust collar etc.
25. Left-Side Spider – Consists (basic) of trowel arms, blades,
wear plate, and thrust collar etc.
26. Safety Kill Switch – Shuts down engine when operator is
not sitting in seat.
27. Engine Oil Filler Cap - Remove this cap to add engine oil.
28. Overflow Bottle - Supplies coolant to the radiator when
radiator coolant level is low. Fill to indicated level as shown
on bottle.
29. Engine Air Filter – Prevents dirt and other debris from
entering the fuel system. Lift locking latch on air filter
cannister to gain access to filter element.
30. Engine Dip Stick – Indicates engine oil level. Add oil as
required.
31. Oil Filter – Provides oil filtering for the engine.
32. Battery – Provides +12V DC power to the electrical system
33. Retardant Spray Motors – Used in conjunction with the
34. Retardant Spray Tank – Holds 5 gallons of retardant.
35. Belt Guard – Encloses drive belt used in conjunction with
36. EZ- Mover Boss – Back- side insertion point for EZ Mover.
37. Oil Sight Glass - Indicates the level of the hydraulic oil in
The following section is intended as a basic guide to the rideon 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 “
published by the American Concrete Institute, Detroit Michigan.
left and right spray control buttons.
clutch.
Used when the transporting of the trowel is required.
the gear box.
NOTE
Read this entire instruction manual
completely before attempting to
operate trowel.
Slabs on Grade
”
Figure 3. HHN Controls and Indicators (Rear)
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 14
PAGE 14 — HTN 31V
HHN -31V — NEW MACHINE SETUP INSTRUCTIONS
Trowel Pre-Set-Up Instructions
The purpose of this section is to assist the user in setting up a
NEW
trowel. If your trowel is already assembled (seats, handles,
knobs and battery, then this section can be skipped.
NOTE
The new ride-on trowel cannot be put into service
until the pre-setup installation instructions are
completed. These pre-setup instructions only need
to be performed at the time of unpacking a
trowel.
Before packaging and shipping this Whiteman Ride-On Power
Trowel was run and tested at the factory. If there are problems,
please let us know.
Control Handle Assembly
The steering control handles are not attached to the trowel's two
lower handles at the time of shipment. To attach the steering
control handles to the two lower handle assemblies perform the
following:
1. Remove the bolts from the plastic bag tied to the control
towers.
2. Remove all protective wrapping and straps from the control
handles.
3. Slip the top (loose) piece into the base of the corresponding
handle, making sure to line up the holes.
4. Install the bolt through the lined up holes and tighten the
acorn nut onto the threaded end.
NEW
Seat Assembly
The seat is not installed on the trowel for shipping purposes.
To attach the seat perform the following:
There are two types of seats, depending on what type
of trowel you have. J and B series trowels have slots
on the seat mounting plate that allow fore and aft
adjustment of the seat. H-series 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 lever under the front of the seat.
1. Remove the seat from the protective wrapping.
2. Remove the bolts on the bottom of the seat, and place seat
on the seat mounting plate, then insert the bolts through
the holes or slots on the seat mounting plate and tighten.
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:
NOTE
Use all safety precautions specified by the
battery manufacturer when working with the
battery.
NOTE
Some models are equipped with
adjustable height handles. Adjust the
height by placing the bolt through the
set of holes that corresponds to the
most comfortable height.
5. Pay close attention to any wires that may be inside the
control handles. DO NOT pinch or cut any wires during
installation.
6. Inside the plastic bag of parts are two knobs for the pitch
control tower cranks. Install these two knobs onto the tower
crank levers.
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 15
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. Close the plastic battery box cover and secure the
battery box.
HHN -31V — INITIAL START-UP
This section is intended to assist the operator with the initial
start-up of the HHN series Ride-On Power trowel. It is extremely
important that this section be read carefully before attempting to
use the trowel in the field.
DO NOT use your ride-on power trowel until this section is
thoroughly understood.
2. The oil level of the gear box should be at the half-way point
of the sight glass (Figure 5). The gear box oil capacity is
144 oz. If additional oil is required, unscrew the oil fill plug
located on top of the gearbox, and refill with ISO 220 A
GMA GR 5 EP oil.
CAUTION:
Failure to understand the operation of the HHN
Ride-ON Power Trowel could result in severe
damage to the trowels or personal injury.
See Figures 2 and 3 (Pages 13 and 14) for
the location of any control or indicator
referenced in this manual.
Engine Oil Level
1. Pull the engine oil dipstick from its holder.
2. Determine if engine oil is low (Figure 4), add
correct amount of engine oil to bring oil level
to a normal safe level.
Figure 5. Gearbox Oil Plugs/Sight Glass
Fuel
1. Determine if the engine fuel is low (Figure 6). If fuel level is
low, remove the fuel filler cap and fill with unleaded gasoline.
Figure 4. 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 5.
CAUTION:
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.
Figure 6. Fuel Gauge
CAUTION:
Never store the ride-on trowel with fuel in the
tank for any extended period of time. Always
clean up spilled fuel immediately.
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 16
PAGE 16 — HTN 31V
HHN 31V-TC — INITIAL START-UP
Starting the Engine
1. With one foot on the ground and the other foot placed on
the trowel's platform, grab hold of any part of the frame and
lift yourself onto the trowel. Then sit down in the operator's
seat.
2. The Whiteman Ride-On Power trowel is equipped with a
kill switch
safety
assembly. Remember the engine will not start unless an
operator is sitting in the operator’s seat. The weight of an
operator depresses an electrical switch, which will allow
the engine to start.
. This switch is located beneath the seat
CAUTION:
NEVER disable or disconnect the kill switch. It
is provided for the operator's safety and injury
may result if it is disabled, disconnected or
improperly maintained.
3. It is recommended that the kill switch be used to stop the
engine after every use. Doing this will verify that the switch
is working properly and presents no danger to the operator.
Remember to turn the key to the “OFF” position after
stopping the machine. Not doing so may drain your units’
battery.
4. The right foot pedal (Figure 7) 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.
7. Turn the ignition key clockwise to the (start) position. The
oil
Figure 8. Oil and Charge Indicator Lights
8. Turn ignition key fully clockwise and listen for engine to
start. Once engine has started release ignition key.
9. If the engine fails to start in this manner, consult the engine
owner's manual supplied with the trowel.
10. 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 Table
4 (Troubleshooting ) for possible problems.
11. Repeat this section a few times to get fully acquainted with
the engine starting procedure.
Steering
Two control levers located in front of the operator’s seat provide
directional control for the HHN Ride-On Power Trowel. Table 3
(Page 18) illustrates the various directional positions of the
joysticks and their effect on the ride-on trowel.
and charge indicator lights (Figure 8) should be on.
Figure 7. Blade Speed Control Foot Pedal
5. Keep your foot OFF the gas pedal (right foot pedal). If the
engine is cold, adjust the choke but in all circumstances,
start the engine at idle (without touching the gas pedal).
6. Insert the
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 17
ignition key
into the ignition switch .
NOTE
All directional references with respect
to the steering control levers are from
operator’s
the
2. Push both the left and right control levers forward. See
Figure 9.
3. 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.
seat position.
4. 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.
5. 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.
6. 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.
7. Push both the left and right joysticks backward and repeat
steps 3 through 6 while substituting the word reverse for
Figure 9. Left and Right Control Levers
forward.
HHN -31V — INITIAL START-UP
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HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 18
PAGE 18 — HTN 31V
MAINTENANCE PROCEDURES
.
See the engine manual supplied with your machine for
appropriate engine maintenance schedule and
troubleshooting guide for problems.
At the front of the book (Page B) there is a “Daily Pre-Operation
Checklist”. Make copies of this checklist and use it on a daily
basis.
Disconnect spark plug wires and battery cables before
attempting any service or maintenance on the ride-on trowel.
MAINTENANCE SCHEDULE
Daily (8-10 Hours)
NOTE
Checking The 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.
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 .
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 thedrive belt is worn or damaged, replace the
drive belt.
HHN -31V — MAINTENANCE
1. Check the fluid levels in the engine and gearboxes, fill as
necessary.
Weekly (30-40 Hours)
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.
4. Replace engine oil and filter as necessary, see engine
manual.
Monthly (100-125 Hours)
1. Remove, clean, reinstall and relube the arms and thrust
collar. Adjust the blade arms.
2. Replace gearbox lubricant after the first 100 hours of
operation. Then replace every 500-600 hours.
3. Check drive belt fro excessive wear.
Yearly (500-600 Hours)
1. Check and replace if necessary the arm bushings, and
thrust collar bushings, shaft seals and belts.
2. Check pitch control cables for wear.
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 from all moving
parts to prevent bodily injury.
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.
3. Replace gearbox lubricant.
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 19
NOTE
zz
z
Leave the existing drive belt intact until instructed
zz
to cut it.
zz
z
Leave the engine in place for this procedure. It is
zz
not necessary to slide the engine to replace the
drive belt.
zz
z
Have a 3/4 X 1 X 3.25 inch wooden block available.
zz
Removing the V-belt
1. Remove the seven HHC screws that secure the V-belt
guard cover as shown in Figure 10. Please note that the
screw under the muffler is some what difficult to remove.
2. Remove the drive belt guard cover from the trowel and set
aside.
.
HHN -31V — MAINTENANCE
Figure 11. Lower Drive Pulley
Figure 10. Drive Belt Guard Cover
3. Once the drive belt "Guard Cover" has been removed,
squeeze the drive belt as shown in Figure 11, and pull the
V-belt upwards. This will spread open the faces of the
drive pulley.
4.
Insert
the 3/4" X 1" X 3.25" block between the moveable
face and the fixed face of the lower drive pulley. This block
will help keep the lower drive pulley faces open while
installing the new V-belt.
5. Work the drive belt over the lower drive pulley as shown in
Figure 12, position it over the CV-joint boot, then pull the
belt over the upper drive pulley also shown in Figure 12.
6. Once drive belt is free from both the upper and lower pulley's
CUT
the drive belt.
lower
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 20
Figure 12. Drive Belt Removal
PAGE 20 — HTN 31V
HHN -31V — MAINTENANCE
Installing the Replacement Drive Belt
The HHN trowel is equipped with a replacement drive belt (spare)
carrier (Figure 13), which is mounted on the back-side of the fuel
tank opposite 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.
1. To add a replacement drive belt for use on the upper and
lower drive pulleys, remove the 2 screws that secure the
spare drive belt carrier.
2. Remove the spare drive belt carrier from the trowel, and
free the replacement drive belt.
3. Slide the replacement drive belt over the upper and lower
pulleys reversing steps 1 thru 5 on page 20.
NOTE
It will be necessary to disconnect the CV-Joint from the
left-side gear box coupler. This means the removal of the
three screws that secure the CV-Joint to the gear box.
Spare Drive Belt Replacement
To replace a spare drive belt, be prepared to disconnect the CVjoint from the left-side gear box.
1. Place the HHN trowel on jack stands, and observe all safety
precautions.
2. Remove the three screws that secure the CV-joint to the
left-side gear box coupler.
3. Once the CV-joint has been separated from the left-side
gearbox, push the CV-joint inward so that a gap exist
between the gearbox and the CV-joint (Figure 13). Slide
the spare V-belt between the gear box coupler and the CVjoint. If any grease or oil is present on the replacement
drive belt, remove it.
4. Place the spare drive belt inside the drive belt carrier, and
secure the spare belt carrier to the back-side of fuel tank.
5. Install the three screws that secure the CV-joint to the leftside gear box coupler.
It may be necessary to disconnect the CV-Joint from the
lower pulley coupler. This means the removal of the three
screws that secure the CV-Joint to the pulley.
NOTE
Figure 13. Spare V-Belt Replacement
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 21
HHN -31V — MAINTENANCE
The HHN trowel is equipped with a "Torque Converter" which
supplies torque to both the left and right gear boxes.
The function of the a torque converter 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.
The torque converter used in the HHN series trowels is of the
variable pitch pulley type (Figure 14) connected by a drive belt.
Fig. 14. Torque Converter/Variable Pitch Pulley
As shown in Figure 16, centrifugal force pushes the roller arms (see
Figure 17 below) against the ramp plate, forcing moveable face
toward fixed face squeezing belt.
The "Variable Pitch Pulleys" have one
. The
face
is controlled by roller weight arms and springs, which change
position according to engine speed. The
is controlled by a spring and belt tension.
face
Fig. 16. Pulley Interaction
fixed face
drive
pulley ( torque converter, Figure 17) moveable face
, and one
driven
pulley
moveable
moveable
Drive Pulley
The "Drive Pulley" uses centrifugal force (Figures 15 and 16)
to create a belt squeeze force transmitted at the pulley faces.
This condition functions as an automatic clutch.
Figure 15. Torque Converter (Centrifugal Force)
Fig. 17. Variable Pitch Pulley
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 22
PAGE 22 — HTN 31V
HHN -31V — MAINTENANCE
How It Works (Figure 17)
Condition A:
Condition B:
Condition C:
zz
z
Engine Idling
zz
zz
z
Drive Pulley: Small
zz
zz
z
Driven Pulley: Large
zz
zz
z
Belt: Loose and Stationary
zz
zz
z
Engine Accelerating
zz
zz
z
Drive Pulley: Small But Increasing
zz
zz
z
Driven Pulley: Large But Decreasing
zz
zz
z
Belt: Approaching Tightness
zz
zz
Engine At High Speed
z
zz
zz
z
Drive Pulley: Large
zz
zz
z
Driven Pulley: Small
zz
zz
z
Belt: Tight
zz
Figure 17. Pulley Conditions
The torque sensitive pulley (Figure 18) 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.
Figure 18. Pulley Spring and Cam Bracket
Blade Pitch
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
™
™™
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
order to "break the blades/pans loose". The machine can slowly
be brought up to speed.
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 23
full throttle
On a Single Pitch™ trowel each spider assembly can be pitched
individually, forcing the operator to constantly make adjustments
on each pitch tower.
in
HHN -31V — MAINTENANCE
Blade Pitch Adjustment Procedure
The maintenance adjustment of blade pitch is an adjustment
that is made by a bolt (Figure 19) 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.
There are some things to look for when checking to see if
adjustment is necessary. Is the machine wearing out blades
unevenly (i.e. one blade is completely worn out while the others
look new)? Does the machine have a perceptible rolling or
bouncing motion when in use? Look at the machine while it is
running, do the guard rings “rock up and down” relative to the
ground? Do the pitch control towers rock back and forth? These
are some of the indications that the blade pitch may need to be
adjusted using the adjustment bolts on the trowel blade finger.
It will be possible to 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 that after adjustment, the blades pitch correctly.
Often times, if the blades are incorrectly adjusted, they will not
be able to pitch flat. This occurs when the adjusting bolts have
been raised too high. Conversely, sometimes the adjusting bolts
are too low and the blades cannot be pitched high enough for
finishing operations.
Changing A Blade
Whiteman recommends that all the blades on the entire machine
be changed at the same time. If only one or some of the blades
are changed at one time, the machine will not finish concrete
consistently and the machine may wobble or bounce.
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.
Figure 19. Blade Pitch Adjustment Bolt
The easiest and most consistent way to make this adjustment is
to use the Trowel Arm Adjustment Fixture (P.N. 9177) . This fixture
will allow consistent adjustment of the trowel arm fingers. It comes
with all the hardware necessary to properly accomplish this
maintenance and instructions on how to properly utilize this tool.
Adjusting the trowel arm fingers without a fixture requires a special
talent.
If a trowel arm adjustment fixture is not available and immediate
adjustment is necessary; we suggest the following procedure. If
you can see or feel which blade is pulling harder, adjust the bolt
that corresponds to that blade.
Another way to determine which blades need adjustment is to
place the machine on a flat surface and pitch the blades as flat
as possible. Now, 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.
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.
5. Affix the bolts and lock washers.
6. Repeat steps 2-5 for all remaining blades.
Steering Adjustment
The steering assist adjustment is to be performed only by
qualified service technicians. For HHN steering adjustment
instructions, reference MQ Whiteman service bulletin 200925
Clean-Up
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.
Ttt
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 24
PAGE 24 — HTN 31V
NOTE PAGE
HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 25
HHN -31V — TROUBLESHOOTING
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HHN 31V • RIDE-ON POWER TROWEL — OPERATION & PARTS MANUAL — REV. #5 (03/02/07) — PAGE 26
PAGE 26 — HTN 31V
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