Multiquip HHN34TVD User Manual

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OperatiOn Manual

SerieS

MODel hhn34tvDtcSl4 MODel hhn34tvDtcSl5

riDe-On trOwel

(vanGuarD DM 954 DieSel enGine)

Revision #2 (01/10/11)

To ﬁnd the latest revision of this

publication, visit our website at:

www.multiquip.com

THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.

pn: 21729

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. Arsenicandchromiumfrom chemically treatedlumber.

Your risk from these exposures varies, dependingonhowoftenyoudothistype 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.

PAGE 2 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

SilicOSiS/reSpiratOry warninGS

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.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 3

hhn34tvD 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

Speciﬁcations (Trowel) ........................................... 14

Speciﬁcations (Engine) .......................................... 15

General Information ............................................... 16

Components ..................................................... 18-19

New Machine Setup .............................................. 20

Basic Engine .......................................................... 21

Inspection .............................................................. 22

Operation .......................................................... 23-24

Maintenance ..................................................... 25-41

Maintenance (Old Style Clutch) ...................... 28-32

Maintenance (New Style Clutch) .................... 33-35

Troubleshooting ................................................ 42-43

table Of cOntentS

NOTICE

Speciﬁcations are subject to change without notice.

PAGE 4 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

nOteS

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 5

traininG checkliSt

Training Checklist

No, Description OK? Date

3 Fuel system, refueling procedure.

4 Operation of spray and lights.

7 Emergency stop procedures.

9 Maintaining a hover.

10 Maneuvering.

11 Pitching.

12 Matching blade pitch. Twin-Pitch™

Read operation manual

completely.

Machine layout, location of

components, checking of engine

and hydraulic oil levels.

Operation of controls (machine

not running).

Safety controls, safety stop switch

operation.

Startup of machine, pre-heat,

engine choke.

13 Concrete ﬁ nishing techniques.

14 Shutdown of machine.

15 Lifting of machine (lift loops).

16 Machine transport and storage.

PAGE 6 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

Daily pre-OperatiOn checkliSt

Daily Pre-Operation Checklist

1 Engine oil level

2 Hydraulic oil level

3 Radiator coolant level

4 Condition of blades

5 Blade pitch operation

6 Safety stop switch operation

     

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 7

Safety infOrMatiOn

Do not operate or service the equipment before reading

Potential hazards associated with the operation of this

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.

SAFETY MESSAGES

The four safety messages shown below will inform you about potential hazards that could injure you or others. The safety messages speciﬁ cally address the level of exposure to the operator and are preceded by one of four words:

DANGER, WARNING, CAUTION or NOTICE.

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.

CAUTION

equipment will be referenced with hazard symbols which may appear throughout this manual in conjunction with safety messages.

Symbol Safety Hazard

Lethal exhaust gas hazards

Explosive fuel hazards

Burn hazards

Rotating parts hazards

Indicates a hazardous situation which, if not avoided, COULD result in MINOR or MODERATE INJURY.

NOTICE

Addresses practices not related to personal injury.

Pressurized fluid hazards

Hydraulic fluid hazards

PAGE 8 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

GENERAL SAFETY

NOTICE

This equipment should only be operated by trained and

Whenever necessary, replace nameplate, operation and

accident due to equipment modiﬁ cations. Unauthorized

recommended by Multiquip for this equipment. Damage

keep

Also, know the phone numbers

ﬁ re department.

Safety infOrMatiOn

CAUTION

 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.

 Avoid wearing jewelry or loose ﬁ tting clothes that may

snag on the controls or moving parts as this can cause serious injury.

 NEVER operate this equipment when not

feeling well due to fatigue, illness or when under medication.

 NEVER operate this equipment under the

inﬂ uence of drugs or alcohol.

 ALWAYS clear the work area of any debris, tools, etc.

that would constitute a hazard while the equipment is in operation.



qualiﬁ ed personnel 18 years of age and older.



safety decals when they become difﬁ cult read.

 Manufacturer does not assume responsibility for any

equipment modiﬁ cation will void all warranties.

 NEVER use accessories or attachments that are not

to the equipment and/or injury to user may result.

 ALWAYS know the location of the nearest

ﬁ re extinguisher.

 ALWAYS know the location of the nearest

ﬁ rst aid kit.

 ALWAYS know the location of the nearest phone or

a phone on the job site.

of the nearest ambulance, doctor and This information will be invaluable in the case of an emergency.

 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.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 9

TROWEL SAFETY



NOTICE

keep the machine in proper running condition.

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.

Association of Equipment Manufacturers (AEM) can be

engine is hot. High pressure boiling water will gush out

Safety infOrMatiOn

DANGER

 Engine fuel exhaust gases contain poisonous carbon

monoxide. This gas is colorless and odorless, and can cause death if inhaled.

 The engine of this equipment requires an adequate free

ﬂ ow of cooling air. NEVER operate this equipment in any enclosed or narrow area where free ﬂ ow of the air is restricted. If the air ﬂ ow is restricted it will cause injury to people and property and serio u s dam a ge to t h e equipment or engine.

NEVER operate the equipment in an explosive atmosphere or near combustible materials. An explosion or ﬁ re could result causing severe

bodily harm or even death.

WARNING

If applicable, NEVER use your hand to ﬁ nd

hydraulic leaks. Use a piece of wood or cardboard. Hydraulic ﬂ uid injected into the skin must be treated by a knowledgable physician immediately or severe injury or death can occur.

DANGEROUS

GAS FUMES

 ALWAYS

 Fix damage to machine and replace any broken parts

immediately.

 ALWAYS

 A safety manua l for operating and maint enance

personnel of concrete power trowels produced by the

obtained for a fee by ordering through their website at www.aem.org.

Order FORM PT-160

ENGINE SAFETY

WARNING

 D O NOT place hands o r fi ngers inside engin e

compartment when engine is running.

 NEVER operate the engine with heat shields or

guards removed.

 Keep ﬁ ngers, hands hair and clothing away

from all moving parts to prevent injury.

 DO NOT remove the radiator cap while the

ALWAYS keep clear of rotating or moving

parts while operating the trowel.

NEVER di sco nne ct any emerg enc y

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.

CAUTION

 NEVER allow passengers or riders on the trowel during

operation.

 NEVER lubricate components or attempt service on a

running machine.

 NEVER place your feet or hands inside the guard rings

while starting or operating this equipment.

PAGE 10 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

of the radiator and severely scald any persons in the general area of the trowel.

 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 touch the hot exhaust manifold,

mufﬂ er or cylinder. Allow these parts to cool before servicing equipment.

NOTICE

BATTERY SAFETY

drop the battery. There is a possibility that the

keep the battery charged. If the battery is not

charge battery if frozen. Battery can explode.

environment to avoid the risk of a dangerous concentration

NEGATIVE battery terminal

keep battery cables in good working condition.

Safety infOrMatiOn

 NEVER run engine without an air ﬁ lter or with a dirty air

ﬁ lter. Severe engine damage may occur. Service air ﬁ lter frequently to prevent engine malfunction.

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.

FUEL SAFETY

DANGER

 DO NOT start the engine near spilled fuel or combustible

ﬂ uids. Fuel is extremely ﬂ ammable and its vapors can cause an explosion if ignited.

 ALWAYS refuel in a well-ventilated area, away from

sparks and open ﬂ ames.

 ALWAYS use extreme caution when working with

ﬂ ammable liquids.

 DO NOT ﬁ ll the fuel tank while the engine is running

or hot.

DANGER

 DO NOT

battery will explode.

 DO NOT expose the battery to open ﬂ ames,

sparks, cigarettes, etc. The battery contains combustible gases and liquids. If these gases and liquids come into contact with a ﬂ ame or spark, an explosion could occur.

WARNING

 A LWAYS we ar safety g las ses when

handling the battery to avoid eye irritation. The battery contains acids that can cause injury to the eyes and skin.

 Use well-insulated gloves when picking up

the battery.

 ALWAYS

charged, combustible gas will build up.

 DO NOT

When frozen, warm the battery to at least 61°F (16°C).

 DO NOT overﬁ ll tank, since spilled fuel could ignite if it

comes into contact with hot engine parts or sparks from the ignition system.

 Store fuel in appropriate containers, in well-ventilated

areas and away from sparks and ﬂ ames.

 NEVER use fuel as a cleaning agent.

DO NOT smoke ar oun d o r ne ar th e

equipment. Fire or explosion could result from fuel vapors or if fuel is spilled on a hot engine.

 ALWAYS recharge the battery in a well-ventilated

of combustible gases.

 If the battery liquid (dilute sulfuric acid)

comes into contact with clothing or skin, rinse skin or clothing immediately with plenty of water.

 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

before performing service on the equipment.

 ALWAYS

Repair or replace all worn cables.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 11

TRANSPORTING SAFETY

TOWING SAFETY

make

Make sure the hitch and coupling of the towing vehicle

NEVER

tow a trailer with defective hitches, couplings, chains, etc.

Trailer tires should be inﬂ ated to 50 psi cold.

safety

attach trailer’s safety chains to towing

make sure the vehicle and trailer directional,

The maximum speed for highway towing is 55 MPH unless posted otherwise. Recommended off-road towing is not to

Avoid sudden stops and starts. This can cause skidding,

Safety infOrMatiOn

CAUTION

 NEVER allow any person or animal to

stand underneath the equipment while lifting.

 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.

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.

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.

 NEVER transport trowel with ﬂ oat pans attached unless

safety catches are used and are speciﬁ cally cleared for such transport by the manufacturer.

 NEVER hoist the trowel more than three feet off the

ground with ﬂ oat pans attached.

 Before lifting, make sure that the lift loops are not

damaged.

 Always make sure crane or lifting device has been

properly secured to the lift loops of the equipment.

 ALWAYS shutdown engine before transporting.

CAUTION

 Check with your local county or state safety

towing regulations, in addition to meeting

Department of Transportation (DOT) Safety Towing Regulations, before towing

your trowel.

 In order to reduce the possibility of an accident while

transporting the trowel on public roads, ALWAYS sure the trailer that supports the trowel and the towing vehicle are mechanically sound and in good operating condition.

 ALWAYS shutdown engine before transporting



are rated equal to, or greater than the trailer “gross vehicle weight rating.”

 ALWAYS inspect the hitch and coupling for wear.

 Check the tire air pressure on both towing vehicle and

trailer. Also check the tire tread wear on both vehicles.

 ALWAYS make sure the trailer is equipped with a

chain.

 ALWAYS properly

vehicle.

 ALWAYS

backup, brake and trailer lights are connected and working properly.

 DOT Requirements include the following:

 NEVER lift the equipment while the engine is running.

 Tighten fuel tank cap securely and close fuel cock to

prevent fuel from spilling.

 Use adequate lifting cable (wire or rope) of sufﬁ cient

strength.

 DO NOT lift machine to unnecessary heights.

 ALWAYS tie down equipment during transport by

securing the equipment with rope.

PAGE 12 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

• Connect and test electric brake operation.

• Secure portable power cables in cable tray with tie wraps.



exceed 15 MPH or less depending on type of terrain.



or jack-kniﬁ ng. Smooth, gradual starts and stops will improve towing.

 Avoid sharp turns to prevent rolling.

 Trailer should be adjusted to a level position at all times

when towing.

 Raise and lock trailer wheel stand in up position when

towing.

Safety infOrMatiOn

 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 proper ly.

Examples of potentially hazardous waste are used motor oil, fuel and fuel ﬁ lters.

 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.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 13

SpecificatiOnS (trOwel)

Figure 1. HHN34TVD Dimensions

Table 1. HHN34TVD Speciﬁcations

A–Length – in. (cm) 97.0 (246.4)

B–Width – in. (cm) 50.0 (127)

C–Height – in. (cm)

Weight – lbs. (kgs.) Operating 1,092 (500)

Weight – lbs. (kgs.) Shipping 1,274 (578)

Sound Pressure – dBA

Vibration – ft/s2 (m/ s2)

Engine – H.P. 34

Fuel Tank – gallons (liters) 5 (19)

Rotor – RPM 60 to 160

Path Width – in. (cm) 91 (231)

Lubrication Oil ISO 220 GR 5EP

Gear Box Oil Capacity 144 OZ.

Fuel Consumption (Full Load) 0.54 LB/BHP-HR

Radiator Capacity 1.0 GAL.

46.0 (117)

TBD

NOTES

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 protection is always recommended.

PAGE 14 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

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 “normal ” circumstances. Values were obtained from all three axes of motion. The values shown represent the maximum RMS value from these measurements

SpecificatiOnS (enGine)

Table 2. HHN34TVD Engine Speciﬁcations

Model

Type

Cylinders 3

Piston Displacement 58.1 cu.in. (952 cc)

Bore and Stroke 2.83 in.x 3.07 in. (72 mm x 78 mm)

Max. Output 34 bhp/3600 rpm (25.35 Kw)

Max. Torque 58.3 lbf-ft (26.4 Kg) at 2300 rpm

Cooling System Fully jacketed water-cooled

Engine Oil Capacity

Lubricating System Pressure feed with spin-on ﬁlter

Fuel Tank 5 gal.(18.9 liters)

Fuel Delivery System Fuel Injected

Helical Gearbox Gear Compound

Capacity

Fuel Diesel Fuel - minimum of 40 cetane rating

Briggs & Stratton, Vanguard diesel turbo engine.

3.5 qt. (3.3 liters w/oil ﬁlter replacement)

HHN34TVDTCSL

Briggs 34 HP Engine

DM 954 DT

3.2 qt. (3 liters)

144 oz. (4.26 liters)

ISO 22O AGMA GR 5EP

Starting System Electric Starter - Glow Plug

Dry Weight 196 lbs. (89 Kg)

Dimensions (L x W x H)

17.27 in. x 17.82 in. x 19.74 in.

(438.7 mm x 447.5 mm x 501.4 mm)

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 15

General infOrMatiOn

HHN34TVD RIDE-ON POWER TROWEL FAMILIARIZATION

The HHN34TVD Ride-On Power Trowel is designed for the ﬂoating and ﬁnishing of concrete slabs.

Take a walk around your trowel. Take notice of all the major components (see Figure 2 and Figure 3) 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.

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 levers. Grasp the control levers and move them around a bit. Observe how moving the control levers cause the gearboxes and frame to move.

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.

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.

Engine

Figure 2 and Figure 3 show the location of the controls, indicators and general maintenance parts. Each control may perform more than one function.

Gearboxes

The HHN34TVD Ride-On Power Trowel consists 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

Dual control levers located in front of the operator’s seat are provided for steering this 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 for a complete description of 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

This trowel is equipped with a liquid cooled 34 HP diesel engine. Refer to the engine owner’s manual for speciﬁc instructions regarding engine operation. This manual is included with the trowel at the time of shipping. Please contact your nearest Multiquip dealer should a replacement manual be required.

Blades

The blades of the HHN34TVD 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 HHN34TVD Ride-On Power Trowels are equipped with four or ﬁve blades (depending on model), per rotor equally spaced in a radial pattern and attached to a vertical rotating shaft by means of a spider assembly.

PAGE 16 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

For training, please use the “TRAINING CHECKLIST” located in the front of this manual. 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.

nOteS

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 17

cOMpOnentS

1. Seat — Provides comfortable position for operation of the trowel. 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 (Right) — 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 (Left) — 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. Preheat Light — Lights blue when glow plugs are energized.

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 fuel.

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.

CHG

WATER

OIL

GLOW

PLUGS

FUEL

FILTER

Figure 2. HHN34TVD Components (Front)

SER IES

PAGE 18 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

cOMpOnentS

21. Fuel Filter Light — Lights red when water level rises in the Fuel Filter/Separator. See engine manual for draining instructions.

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. Radiator/Filler Cap — Holds coolant or water nece ss ary to keep engine at a safe opera ting temperature. Remove this cap to add water or antifreeze. DO NOT revove this cap when the engine is warm.

27. Safety Stop Switch — Shuts down engine when operator is not sitting in seat.

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 left and right spray control buttons.

34. Retardant Spray Tank — Holds 5 gallons of retardant.

35. Belt Guard — Encloses drive belt used in conjunction with clutch.

36. EZ- Mover Boss — Back- side insertion point for EZ Mover. Used when the transporting of the trowel is required.

37. Oil Sight Glass — Indicates the level of the hydraulic oil in the gear box.

DIESEL FUEL

RETARDANTONL

Figure 3. HHN34TVD Components (Rear)

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 19

new Machine Setup

NEGATIVE

The purpose of this section is to assist the user in setting up a NEW trowel. If the trowel is already assembled, (seats, handles, knobs and battery), this section can be skipped.

NOTICE

A new ride-on trowel cannot be put into service until the following installation instructions are completed. These instructions only need to be performed at the time of unpacking a NEW trowel.

Before packaging and shipping, this 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 lower handle assemblies, perform the following:

1. Remove the bolts from the plastic bag tied to the control towers.

SEAT ASSEMBLY

The seat is not installed on the trowel for shipping purposes. To attach the seat, perform the following:

NOTICE

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

2. Remove all protective wrapping and straps from the

3. Slip the top (loose) control handle piece into the base

4. Install the bolt through the lined up holes and tighten

5. Pay close attention to any wires that may be inside

6. Remove the two knobs from the plastic bag for the

control handles.

of the corresponding handle, making sure to line up the holes.

the acorn nut onto the threaded end.

NOTICE

Models equipped with adjustable height handles are adjusted by placing the bolt through the set of holes that bring the handles to a height most comfortable for the operator.

the control handles. DO NOT pinch or cut any wires during installation.

pitch control tower cranks and install the knobs onto the tower crank levers.

Use all safety precautions speciﬁed by the battery manufacturer when working with the battery.

To install the battery on the trowel, make sure that the battery is well seated in the battery box. 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. See Figure 4. 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.

CABLE

(BLACK)

POSITIVE

CABLE

(RED)

Figure 4. Battery Cable Orientation

PAGE 20 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

Figure 5. Diesel Engine Components

baSic enGine

INITIAL SERVICING

The diesel engine (Figure 5) must be checked for proper lubrication and ﬁlled with fuel prior to operation. Refer to the manufacturer’s engine manual for instructions and details of operation and servicing. The engine shown above is a Briggs & Stratton Vanguard Diesel engine. Operation for other types of engines may vary somewhat.

1. Engine Tag — Provided engine model identiﬁcation and information.

2. Mufﬂer — Used to reduce noise and emissions.

WARNING

Engine components can generate extreme heat. To prevent burns, DO NOT touch these areas while the engine is running or immediately after operating. NEVER operate the engine with the mufﬂer removed.

3. Fuel Injectors — Provides diesel fuel mixture to combustion chambers.

4. Glow Plug — Energizes to aid in cold starting.

5. Throttle lever — Controlled by accelerator pedal, increases or decreases engine RPM.

environmentally safe manner. DO NOT allow used oil to drain onto the ground or into a water runoff drain.

7. Fuel Filter — Filters fuel for contaminants.

8. Oil Filter — Spin-on type, ﬁlters oil for contaminants.

9. Oil Dip Stick — Remove to check amount and condition of oil in crankcase.

10. Injector Pump — Provides fuel to the fuel injectors.

11. Air Filter — Prevents dirt and other debris from entering the fuel system. Unsnap air ﬁlter cover to gain access to ﬁlter element.

12. Thermostat — Regulates the temperature of the engine coolant.

13. Oil Filler Cap — Remove to add engine oil.

14. Starter — Starts engine when ignition key is rotated to the "ON" position.

15. Alternator — Provides charge for battery and voltage for the +12 VDC electrical system.

16. Oil Pan — Holds a maximum of 3.5 quarts (3.3 liters) of motor oil.

6. Oil Drain Plugs (2) — Remove to drain crankcase oil. Always dispose of used oil and oil ﬁlters in an

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 21

inSpectiOn

OPERATING

WHI TEMA N

This section is intended to assist the operator with the initial inspection of the HHN34TVD trowel. It is extremely impor tant that this section be read carefully before attempting to use the trowel in the ﬁeld.

DO NOT use your trowel until this section is thoroughly understood.

CAUTION

Failure to understand the operation of the HHN34TVD trowel could result in severe damage to the trowel or personal injury.

See Figure 2 and Figure 3 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 6), add correct amount of engine oil to bring oil level to a normal safe level. (See Table 4).

FILL PLUG

SIGHT GLASS

(OIL CHECK)

DRAIN PLUG

Figure 7. Gearbox Oil Plugs/Sight Glass

FUEL

Determine if the engine fuel is low (Figure 8). If fuel level is low, remove the fuel ﬁller cap and ﬁll with appropriate engine fuel. The HHN34TVD uses diesel fuel.

SER IES

ENGINEFUEL

ONL

FUEL

E F

ENGINE OIL

DIPSTICK

SAFE

OIL LEVEL

ADD

ENGINE

OIL

MAX

MIN

Figure 6. 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 7.

2. The oil level of the gear box should be at the half-way point of the sight glass (Figure 7). 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 the gearbox, and reﬁll with ISO 220 A GMA GR 5 EP oil.

Figure 8. Fuel Gauge

DANGER

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

Never store the ride-on trowel with fuel in the tank for any extended period of time. Always clean up spilled fuel immediately.

PAGE 22 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

OperatiOn

STARTING THE ENGINE

1. Place one foot on the trowel’s platform, grab ahold of

any part of the frame, lift yourself onto the trowel, then sit down in the operator’s seat.

NOTICE

The HHN34TVD trowel 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.

WARNING

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.

NOTICE

Using the safey stop switch to stop the engine after every use will verify that the switch is working properly. Remember to turn the key to the “OFF” position after stopping the machine. Not doing so may drain the battery.

5. Turn the ignition key clockwise to the (start) position. The oil, charge, and preheat indicator lights (Figure

10) should be ON.

NOTICE

If the engine is cold, wait for the preheat light to extinguish before starting.

NOTICE

OIL, CHARGE, and PREHEAT indicator lights come on when ignition switch is in the ON position, and the engine is NOT running.

CHG

WATER

OIL

GLOW

PLUGS

FUEL

FILTER

CHG

WATER

OIL

GLOW

PLUGS

FUEL FILTER

Figure 9. Blade Speed Control Foot Pedal

2. The right 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.

3. Keep your foot OFF the pedal (right foot pedal). Start the engine at idle (without touching the foot pedal).

4. Insert the ignition key into the ignition switch.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 23

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 stop switch by standing up brieﬂy. The switch under the seat should cause the engine to stop. If the switch fails to shut down the engine, turn off the engine with the key switch and ﬁx the safety stop switch. See Troubleshooting tables for possible problems.

Repeat this section a few times to get fully acquainted with the engine starting procedure.

OperatiOn

STEERING

Two control levers located in front of the operator’s seat provide directional control for the HHN34TVD trowel. Table 3 illustrates the various directional positions of the joysticks and their effect on the ride-on trowel.

NOTICE

All directional references with respect to the steering control levers are from the operator’s seat position.

1. Push both the left and right control levers forward. See Figure 11.

LEFT

CONTROL

LEVER

RIGHT

CONTROL

LEVER

Figure 11. Left and Right Control Levers

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.

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.

FORWARD

DIRECTION

4. Practice maneuvering the ride-on trowel using the information listed inTable 3. Try to practice controlled motions as if you were ﬁnishing a slab of concrete. Practice edging and covering a large area.

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.

6. Push both the left and right joysticks backward and repeat steps 3 through 6 while substituting the word reverse for forward.

Table 3. Control Lever Directional Positioning

Control Lever Direction Results

Left

Right

Left and Right

Move Control Lever

Forward

Move Control Lever

Backward

Move Control Lever

Forward

Move Control Lever

Backward

Move Both Control Levers

Forward

Move Both Control Levers

Backward

Move Both Control Levers

to the Right

Move Both Control Levers

to the Left

Causes the ride-on trowel to

move forward and to the right.

Causes the ride-on trowel to

move backward and to the left.

Causes the ride-on trowel to move forward and to the left.

Causes the ride-on trowel to

move backward and to the

right.

Causes the ride-on trowel to

move forward in a straight line.

Causes the ride-on trowel to move backward in a straight

line.

Causes the ride-on trowel to

move to the right.

Causes the ride-on trowel to

move to the left

CAUTION

Trowel arms can be damaged by rough handling or by striking exposed plumbing or forms while in operation. ALWAYS look-out for objects which might cause damage to the trowel arms.

PAGE 24 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

Maintenance

When performing 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 appr o priat e engin e maint e nanc e sched u le and troubleshooting guide for problems.

WARNING

Accidental starts can cause severe injury or death.

ALWAYS place the ON/OFF switch in the OFF position before performing maintenance.

Disconnect negative battery cable from battery before servicing.

ALWAYS allow the engine to cool before servicing. NEVER attempt any maintenance work on a hot (mufﬂer, radiator, etc.) trowel.

MAINTENANCE SCHEDULE

3. Replace gearbox lubricant.

4. Check and adjust blade speed.

WARNING

Cer tai n ma i nten ance ope rati o ns or ma c hine 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.

AIR CLEANER (DAILY)

The Vanguard 34 hp turbo diesel 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 12).

AIR CLEANER

BODY

Daily (8-10 Hours)

1. Check the ﬂuid levels in the engine and gearboxes, ﬁll as necessary.

2. Check V-belt.

Weekly (30-40 Hours)

1. Relube arms, thrust collar and steering links.

2. Replace blades if necessary.

3. Check the engine air ﬁlter and change as necessary.

Monthly (100-150 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. Replace every 500-600 hours.

3. Check drive belt for excessive wear.

4. Replace engine oil and ﬁlter as necessary, see engine manual.

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.

CARTRIDGE

COVER

LATCHES

(COVER CLAMPS)

Figure 12. Air Cleaner Components

1. Unlock the cover clamps and remove cover.

2. Remove cartridge from air cleaner body.

3. Clean cartridge by gently tapping the end with the handle of a screwdriver. Replace cartridge if very dirty or damaged.

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.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 25

Maintenance

PRIMING

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.

2. Remove the oil ﬁller cap (Figure 5), and ﬁll engine crankcase with recommended type oil as listed in Table

4. Fill to the upper limit of dipstick.

3. Crankcase oil capacity with oil ﬁlter replacement is

6.72 qts. (7.4 liters).

Oil Filter (300 Hours)

1. Replace the engine oil ﬁlter (Figure 13) every other oil change or 300 hours. Refer to your engine manual for speciﬁc details to perform this operation.

SEAL

PUMP

O-RING

DRAIN

PLUG

SENSOR

WIRE

FUEL

FILTER

Figure 14. Fuel Filter

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.

OIL AND FUEL LINES

Figure 13. Oil Filter

2. Be sure to coat the seal of the new oil ﬁlter with clean engine oil.

Table 4. Recommended Viscosity Grades

10W-30, 10W-40, 10W-50

5W-30

-20

F C

-30

TEMPERATURE RANGE EXPECTED BEFORE NEXT OIL CHANGE

-20

32 40 60 80 100

-10

20 30 40

FUEL FILTER

Replace the engine fuel ﬁlter (Figure 14) every 800 hours. Refer to your engine manual for speciﬁc details to perform this operation.

 Check the oil and fuel lines and connections regularly

for leaks or damage. Repair or replace as necessary.

 Replace the oil and fuel lines every two years to maintain

the line's performance and ﬂexibility.

RADIATOR/COOLING SYSTEM

WARNING

Hot coolant can cause severe burns. DO NOT remove cap if radiator is HOT.

1. Check and clean radiator ﬁns.

2. Check cooling water.

3. Check radiator hoses for fatigue or cracking.

4. Check radiator cap seal.

Refer to your engine manual for additional information.

PAGE 26 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

BATTERY/CHARGING SYSTEM

DANGER

Flammable, explosive gas. (produces hydrogen gas while charging or during operation). Keep area around battery well ventilated and keep from any ﬁre source.

Battery electrolyte contains corrosive, toxic chemical. (dilute sulfuric acid). Avoid contact with eyes and skin.

Sh ock o r fire due to elec tri c s hor tcircuit. Disconnect battery cables before inspecting electrical system and never “spark” battery terminals to test for charge.

1. Check and clean battery terminals for corrosion.

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.

Maintenance

3. Never attempt to charge a battery that is frozen. The

battery can explode unless ﬁrst allowed to thaw.

4. Disconnect the negative terminal ( - ) of the battery

during storage. If unit will be stored where ambient temperature will drop to -15° C or less, remove and store battery in a warm, dry place.

LONG TERM STORAGE

 Remove the battery.  Drain fuel from fuel tank.  Clean exterior with a cloth soaked in clean oil.  Store unit covered with plastic sheet in moisture and

dust-free location out of direct sunlight.

CAUTION

Never store the ride-on trowel with fuel in the tank for any extended period of time. Always clean up spilled fuel immediately.

ENGINE TUNE-UP

See the engine manual supplied with your machine for speciﬁc information on tuning up your engine as well as appropriate maintenance schedule and troubleshooting guide for problems.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 27

Maintenance (OlD Style clutch)

WIDTH

NOTICE

This section is intended to aid users in the maintenance of drive assemblies with an old style Comet clutch.

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 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 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.

REMOVING THE DRIVE BELT

1. Remove Drive Belt Guard Cover. See Figure 16.

DRIVE

BELT

COVER

Figure 16. Drive Belt Cover

2. Squeeze the drive belt as shown in Figure 17, and pull the belt upwards. This will spread open the faces of the lower drive pulley.

DRIVE

BELT

LOWER PULLEY

Figure 17. Expanding Lower Drive Pulley

3. Insert the wooden block (Figure 17) between the moveable face and the ﬁxed face of the lower drive pulley. See Figure

20. This block will help keep the lower drive pulley faces open while installing the new drive belt.

WOOD

BLOCK

 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.

 Have a 3/4 x 1 x 3-1/4 inch wooden block available.

LENGTH

HEIGHT

.75 IN.

Figure 15. Wooden Block for Spacer

PAGE 28 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

3.25 IN.

1.00 IN.

Figure 18. Wood Block

4. If the belt is not being reused (recommended), CUT the drive belt. Ensure all belt remnants are removed from the pulleys.

Maintenance (OlD Style clutch)

SPARE BELT

INSTALLING DRIVE BELT (USING REPLACEMENT DRIVE BELT)

The HHN34TVD Ride-On Power Trowel is equipped with a replacement drive belt (spare) carrier, which is mounted on the inboard side of the fuel tank near 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.

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.

1. If necessary, refer to the “Removing the Drive Belt” section. Ensure all remnants of old belt have been removed from pulleys.

2. To replace the drive belt with the spare drive belt, remove the 2 bolts that secure the drive belt carrier. (Figure 19) This will allow free movement of the belt for installation. Take care with to not contaminate the relplacement belt with grease or dirt.

3. With the wood block holding the lower pulley open, place the replacement belt into the lower pulley ﬁrst. Work the belt over the upper drive pulley into the pulley groove.

4. Squeeze the belt enough to remove the wood block. With the block removed, release the tension on the belt.

5. Reinstall the spare belt carrier and the drive belt guard.

6. Replace the spare belt before the next trowel use. See “Spare Drive Belt Replacement” procedure.

HOLDER

CV-JOINT

DRIVE

BELT

Figure 19. Installing Drive Belt

LOWER

PULLEY

WOOD

BLOCK

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 29

SPARE BELT

Maintenance (OlD Style clutch)

VARIABLE

COMET

CENTRIFUGAL

SPARE DRIVE BELT REPLACEMENT

To replace a spare drive belt, be prepared to disconnect the CV-joint from the left-side gearbox. See Figure 20.

1. Place the trowel on suitable supports and observe all safety precautions.

2. Remove the three screws that secure the CV-joint to the left-side gearbox coupler.

3. Once the CV-joint has been separated from the leftside gearbox, push the CV-joint inward so that a gap exists between the gearbox and the CV-joint. 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.

4. Place the spare drive belt inside the drive belt carrier, and secure the spare belt carrier to the inboard side of the left gearbox.

5. Install the three screws that secure the CV-joint to the left-side gearbox coupler.

TORQUE CONVERTER

The HHN34TVD trowel is equipped with a Torque Converter which supplies torque to both the left and right gear boxes.

The function of the 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 is of the variable pitch pulley type, (Figure 21) connected by a drive belt.

CLUTCH

TORQUE

CONVERTER

DRIVE

BELT

PITCH

PULLEY

HOLDER

LEFT

SIDE

GEARBOX

NEW

SPARE

BELT

CV-JOINT

BOLT

(REMOVE

3 PLACES)

Figure 20. Replace Spare Belt

Figure 21. Torque Converter/Variable Pitch

Pulley

DRIVE PULLEY

The drive pulley uses centrifugal force (Figure 22 and Figure 23) to create a belt squeeze force transmitted at the pulley faces. This condition functions as an automatic clutch.

FORCE

FIXED FACE

VARIABLE

FORCE

BELT

SQUEEZE

FORCE

Figure 22. Torque Converter (Centrifugal Force)

PAGE 30 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

Maintenance (OlD Style clutch)

CENTRIFUGAL

DRIVE

As shown in Figure 22, centrifugal force pushes the roller arms (Figure 23) against the ramp plate, forcing the moveable face toward the ﬁxed face and squeezing the belt

DISTANCE

MOVEABLE

FACE

TRAVELS

MOVEABLE

FACE

FORCE

DRIVE PULLEY

LOW ENGINE RPM

DRIVE PULLEY

HIGH ENGINE RPM

LOW OUTPUT SPEED

HIGH OUTPUT SPEED

Figure 23. Pulley Interaction

MOVEABLE

DRIVEN PULLEY

FACE

The “Variable Pitch Pulleys” have one ﬁxed face, and one moveable face. The drive pulley (Figure 24) 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.

HOW IT WORKS

Refer to Figure 25.

A B C

NEUTRAL LOW

SPEED

Figure 25. Pulley Conditions

Condition A:

 Engine Idling

 Drive Pulley: Small

 Driven Pulley: Large

 Belt: Loose and Stationary

Condition B:

 Engine Accelerating

DRIVE PULLEY

DRIVEN PULLEY

HIGH

SPEED

BUSHING

SPRING

ROLLER

PULLEY

ARM

WEIGHT

Figure 24. Variable Pitch Pulley

RAMP

PLATE

 Drive Pulley: Small But Increasing

 Driven Pulley: Large But Decreasing

 Belt: Approaching Tightness

Condition C:

 Engine At High Speed

 Drive Pulley: Large

 Driven Pulley: Small

 Belt: Tight

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 31

Maintenance (OlD Style clutch)

CLUTCH

This clutch system provides a high pulley ratio (a low gearso 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 26) 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

CAM

BRACKET

PULLEY

MOVEABLE

FACE

Figure 26. Pulley Spring and Cam Bracket

FIXED FACE

NOTICE

If replacement of the clutch is required, use clutch replacement kit, P/N 22581, to upgrade to Multi-Clutch system. New style drive assembly must be installed per instruction sheet, P/N 23444, 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.

PAGE 32 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

Maintenance (new Style clutch)

NOTICE

This section is intended to aid users in the maintenance of drive assemblies with a new style Multi-Clutch.

CHECKING 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 from all moving parts to prevent bodily injury.

BELT MEASUREMENT

Long life can be expected with this new drive assembly as long as the belt is kept properly aligned.

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 27.

CVT BELT

CALIPERS

Figure 27. Belt Measurement

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.

REMOVING THE DRIVE BELT

1. Remove the rear and left panels of the Drive Belt Guard. See Figure 28.

MUFFLER

BELT GUARD

COVER

LEF

REMOVE

Figure 28. Remove Belt Guard Panels

REAR

REMOVE SCREWS

REMOVE

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 33

Maintenance (new Style clutch)

2. Disconnect the left-side CV Axle from the left-side gearbox and the lower drive pulley coupler. See Figure 29.

NOTICE

Note that the 3 bolts securing the CV axle to the coupler are shorter than those securing the CV axle to the gearbox. Remember bolt orientation for reassembly.

UPPER DRIVE

PULLEY/CLUTCH

CVT

BELT

LEFT-SIDE GEARBOX

Figure 29. Remove Left-Side CV Axle

SHORTER

SCREWS (3)

GEARBOX COUPLER

CV AXLE

COUPLER

LOWER

DRIVE

PULLEY

CVT BELT

(P/N 23365)

PULL UPWARDS

AND TOWARDS

REAR OF TROWEL

FIXED FACE

VEABLE

FACE

LOWER

PULLEY

Figure 30. Holding Lower Pulley Open

2. Place free end of CVT belt into upper pulley grooves.

CLUTCH

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 30) and pull the belt upwards and towards the rear of the trowel. This will spread open the faces of the lower drive pulley.

UPPER

PULLEY

LOWER

PULLEY

Figure 31. Upper Pulley Belt Installation

3. Reconnect left-side CV Axle Assembly. to the left side gearbox and lower drive pulley coupler. See Figure 29.

PAGE 34 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

Maintenance (new Style clutch)

HOW IT WORKS

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 driven or secondary sheaves. The opening and closing of these sheaves creates a ratio variation… hence CVT or Continuously 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 stationar y 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.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 35

Maintenance

OPERATING

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™

On a Single Pitch™ trowel each spider assembly can be pitched individually, forcing the operator to constantly make adjustments on each pitch tower.

Twin Pitch™

Trowels equipped with Twin Pitch™ 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 procedure. Refer to Figure 32.

Blade Pitch Adjustment Procedure

Maintenance adjustment of blade pitch is made by adjusting a bolt (Figure 33) 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.

Look for the following indications if blades are wearing unevenly. If so, adjustment may be necessary.

 Is one blade 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?

SPIDER PLATE

TROWEL LEVER (FINGER)

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.

POSITION

TWIN PITCH™

DISENGAGED

(ONE SIDE)

Figure 32. Pitch Towers

WHIT EMAN

SERI ES

TROWEL ARM

BLADE PITCH

ADJUSTMENT BOLT

Figure 33. Blade Pitch Adjustment Bolt

The easiest and most consistent way to make adjustments on the trowel arm ﬁngers is to use the Trowel Arm Adjustment Fixture (P/N 9177). It comes with all the hardware necessary to properly accomplish this maintenance and instructions on how to utilize this tool.

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.

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.

PAGE 36 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

Maintenance

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.

Blades that are incorrectly adjusted often will not be able to pitch ﬂat. This can occur if the adjusting bolts are raised too high. Conversely, adjusting bolts that are too low will not allow the blades to be pitched high enough for ﬁnishing operations.

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.

CHANGING BLADES

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.

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.

2. Remove the bolts and lock washers on the trowel arm,

and then remove the blade.

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.

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.

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?

 Look at the machine while it is running. Do the guard

rings “rock up and down” relative to the ground?

1. Place the trowel in a FLAT, LEVEL area.

NOTICE

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) threequarter inch (19 mm) thick FLAT steel plate should be used for testing.

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. Reinstall the bolts and lock washers.

6. Repeat steps 2-5 for all remaining blades.

STEERING ADJUSTMENT

The steering assist adjustment should be performed only by qualiﬁed service technicians. For HHN34TVD steering adjustment instructions, reference MQ Whiteman service bulletin 200925.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 37

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 34).

Figure 34 illustrates “incorrect alignment,” worn spider

GEARBOX

WASHER

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.

ADJUSTMENT BOLT

“DISHED”

EFFECT ON

FINISHED

CONCRETE

LOWER

WEAR PLATE

Maintenance

SURFACE

Figure 34. Incorrect Spider Plate Alignment

Figure 35 illustrates the “correct alignment ” for a spider plate (as shipped from the factory).

GEARBOX

TROWEL

CORRECT

ALIGNMENT

SURFACE

ARM

MOUNTING BAR

BLADE

Figure 35. Correct Spider Plate Alignment

SPIDER REMOVAL

Remove the spider assembly from the gearbox shaft as follows:

1. Locate the cone point square head set screw (Figure

36) and attached jam nut found on the side of the spider assembly.

JAM NUT

SET SCREW

Figure 36. Spider Removal

TROWEL BLADE REMOVAL

Remove the trowel blades by removing the three hex head bolts (Figure 37) from the trowel arm. Set blades aside.

TROWEL ARM

TROWEL

BLADE

HEX HEAD

BOLT

LOCK

2. Loosen the jam nut and cone point square head set screw.

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.

PAGE 38 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

Figure 37. Trowel Blade Removal

Maintenance

Hex-Shaft Section

TROWEL ARM REMOVAL

1. Remove the hardware securing the stabilizer ring to

the trowel arm. (Figure 38)

Figure 38. Stabilizer Ring

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

39) from the spider plate.

3. Remove the trowel arm from the spider plate.

SPIDER

PLATE

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.

5. Examine the bronze trowel arm bushing (Figure 37), and clean if necessary. Replace bushing if out-ofround or worn.

BRONZE

BUSHING

Figure 40. Bronze Bushings

6. Wire brush any build-up of concrete from all six sides of the trowel arm. Repeat this for the remaining arms.

CHECKING TROWEL 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 Figures 38 and 39:

Lever Mounting Slot

(Left Arm Shown)

Roll Pin Hole

Blade Attachment Bolt Hole (1 of 3)

Flat of Hexagonal-Shaft (Top of Arm)

ROLL

HEX HEAD

BOLT

(ZERK

FITTING)

Figure 39. Remove Roll Pin and Zerk Fitting

4. Should the trowel arm inserts (bronze bushing) come

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 39

Trowel Arm

Round Shaft Section

Figure 41. Trowel Arm

Trowel Arm

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.

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 42) .

TROWEL

FLAT

SURFACE

ADJUSTMENT

Maintenance

TROWEL

DISTANCE =

FEELER GAUGE

(.005 in./0.127 mm)

ARM

FEELER GAUGE

(.004 in./0.10 mm)

TEST

Figure 42. Checking Trowel Arm Flatness

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.

4. If the trowel arm is found to be uneven or bent, replace the trowel arm.

TROWEL ARM ADJUSTMENT

Shown in (Figure 43) 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.

1. Locate the trowel arm adjustment tool P/N 9177.

BOLT

LOCKING

“DISTANCE”

SIDE VIEW

Figure 43. Trowel Arm Adjustment Tool Side View

2. Ensure the ﬁxture arm is in the proper setting (up or down) for your trowel arm rotation as shown in Figure 44.

NUT

FIXTURE

ARM

Figure 44. Trowel Arm Adjustment Setup

3. Unscrew the locking bolts on the adjustment tool and place the trowel arm into the ﬁxture channel as shown in Figure 45. 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.

ARM

SHIM

LOCKING

BOLTS

ARM

LEVER

TROWEL ARM ADJUSTMENT

FIXTURE

Figure 45. Trowel Arm Adjustment Fixture

Components

FIXTURE ARM

ADJUSTMENT BOLT

.010 in.

ADJUSTMENT BOLT

4. Use an allen wrench to tighten the locking bolts securing the trowel arm in place.

5. Adjust the bolt “distance” shown in Figure 45to match one of the arms. The other arms will be adjusted to match this distance.

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.

NOTICE

Arms with CLOCK-WISE blade rotation use the ﬁxture arm in the UP position (Figure 44, A). Arms with COUNTER CLOCK-WISE blade rotation use the ﬁxture with the ﬁxture arm in the DOWN position (Figure 44, B).

PAGE 40 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

7. Once the correct adjustment is made, tighten the lock nut on the trowel arm to lock in place.

8. Loosen locking nuts on the adjustment ﬁxture, and remove trowel arm.

9. Repeat steps for the remaining trowel arms.

REASSEMBLY

Maintenance

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.

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. Reinstall bronze bushing onto trowel arm.

4. Repeat steps 2–3 for each trowel arm.

5. Make sure that the spring tensioner is in the correct position to exert tension on the trowel arm.

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.

7. Lock trowel arms in place by tightening the hex head bolt with zerk grease ﬁtting and jam nut.

8. Re-install the blades onto the trowel arms.

9. Install stabilizer ring onto spider assembly.

10. Lubricate all grease points (zerk ﬁttings) with premium “Lithum 12” based grease, conforming to NLG1 Grade #2 consistency.

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.

WARNING

DO NOT lift the trowel when the pans are

attached.

ALWAYS install pans either on the work area or on an area that is next to and level with the work area.

Refer to Figure 43 when installing pans onto ﬁnisher blades.

KNOB, TIE-DOWN

Z-CLIP PANS

TIE-DOWN,

BLADE

Z-CLIP,

PAN

Figure 46. Z-Clip Finisher Pan Installation

BLADE

ASSEMBLY

1. Lift trowel just enough to slide pan under blades. Lower ﬁnisher onto pan with blades adjacent to Z-Clips.

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 46.

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.

DECOMMISSIONING TROWEL/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.

3. The remainder can be brought to a salvage yard or metal reclamation facility for further dismantling.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 41

Symptom Possible Problem Solution

Engine running rough or not at all.

Safety stop switch not functioning.

Trowel bounces, rolls concrete, or makes uneven

swirls in concrete.

Machine has a perceptible rolling motion while

running.

trOubleShOOtinG

Troubleshooting (Ride-On Mechanical Trowel)

Stop switch malfunction?

Fuel?

Ignition?

Bad contacts? Replace switch.

Loose wire connections? Check wiring. Replace as necessary.

Other problems? Consult engine manufacturer’s manual.

Blades?

Pitch Adjustment?

Bent trowel arms?

Trowel arm bushings?

Thrust collar?

Thrust collar bushing?

Thrust bearing worn?

Main shaft?

Yoke?

Blade Pitch?

Make sure that the stop switch is functioning when the

operator is seated. Replace switch if necessary.

Look at the fuel system. Make sure there is fuel being

supplied to the engine. Check to ensure that the fuel

ﬁ lter is not clogged.

Check to ensure that the ignition switch has power and

is functioning correctly.

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.

Check that all blades are set at the same pitch angle

as measured at the spider. A ﬁ eld adjustment tool

is available for height adjustment of the trowel arms

(contact Parts Department).

Check the spider assembly for bent trowel arms. If one

of the arms is even slightly bent, replace it immediately.

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.

Check the ﬂ atness 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.

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.

Check to make sure that both ﬁ ngers of the yoke press

evenly on the wear cap. Replace yoke as necessary.

Check to ensure that each blade is adjusted to have the

same pitch as all other blades. Adjust per maintenance

section in manual.

PAGE 42 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

trOubleShOOtinG

Troubleshooting (Ride-On Mechanical Trowel) - continued

Symptom Possible Problem Solution

Check all electrical connections in the lighting circuit.

Wiring?

Lights (optional) not working.

Retardant spray (optional) not working.

Steering is unresponsive.

Operating position is uncomfortable. Seat adjusted for operator? Adjust seat with lever located on the front of the seat.

Power head on Electric Pitch (optional) not

working.

Linkage on Twin Pitch not working.

Lights?

Bad switch?

Bad fuse? Check fuse. Replace fuse if defective.

Retardant? Check retardant level in tank. Fill tank as required.

Wiring?

Bad switch?

Bad spray pump?

Bad fuse? Check fuse. Replace fuse if defective.

Blade speed out of adjustment? See section on blade speed adjustment.

Steering linkage out of adjustment?

Worn components?

Broken or loose parts?

Wiring?

Switch?

Crank handles?

Broken part? Replace all broken parts immediately.

Verify wiring is in good condition with no shorts. Replace

defective wiring or components immediately.

If +12VDC is present at light ﬁ xture connector when light

switch is activated and light does not turn on, replace

light bulb.

Check the continuity of light switch. Replace light switch

if defective.

Check all electrical connections in the spray pump

circuit. Verify wiring is in good condition with no shorts.

Replace defective wiring or components immediately.

Check the continuity of both left and right spray switches

(palm handles). Replace spray switch if defective..

If +12VDC is present at pump connector when spray

switch is activated and pump does not operate, replace

spray pump.

Adjust the connecting linkage found at the base of the

handle. Contact your MQ ﬁ eld service manager for

instructions.

Check for wear of steering bearings and linkage

components. Replace if necessary.

If the motor runs and the pitch is not affected, parts

inside the power head may be loose or broken. Return

power head to dealer for service.

Check all electrical connections and wiring. Check the

continuity at the power head unit. Verify that there is

voltage present at the power head switch with the key

switch in the “on” position.

Check the continuity of the switch. If switch is

malfunctioning, replace immediately.

Make sure that both crank handles are pushed down as

far as possible to ensure that the linkage is engaged.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 43

Symptom Possible Problem Solution

Engine will not start or start is delayed, although engine can be turned over.

At low temperatures engine will not start.

Engine ﬁ res but stops soon as starter is switched off.

Engine stops by itself during normal operation.

Low engine power, output and speed.

trOubleShOOtinG

Troubleshooting (Engine)

No Fuel reaching injection pump? Add fuel. Check entire fuel system.

Defective fuel pump? Replace fuel pump.

Fuel ﬁ lter clogged? Replace fuel ﬁ lter and clean tank.

Faulty fuel supply line? Replace or repair fuel line.

Compression too low?

Fuel pump not working correctly? Repair or replace fuel pump.

Oil pressure too low? Check engine oil pressure.

Low starting temperature limit exceeded?

Defective battery? Charge or replace battery.

Air or water mixed in fuel system?

Engine oil too thick?

Defective battery? Replace battery.

Fuel ﬁ lter blocked? Replace fuel ﬁ lter.

Fuel supply blocked? Check the entire fuel system.

Defective fuel pump? Replace fuel pump.

Fuel tank empty? Add fuel.

Fuel ﬁ lter blocked? Replace fuel ﬁ lter.

Defective fuel pump? Replace fuel pump.

Mechanical oil pressure shutdown sensor stops the engine due to low oil?

Fuel tank empty? Replace fuel ﬁ lter.

Fuel ﬁ lter clogged? Replace fuel ﬁ lter.

Fuel tank venting is inadequate? Ensure that tank is adequately vented.

Leaks at pipe unions?

Speed control lever does not remain in

selected position?

Engine oil level too full? Correct engine oil level.

Injection pump wear?

Check piston, cylinder and valves. Adjust or repair per engine repair manual.

Comply with cold starting instructions and proper oil viscosity.

Check carefully for loosened fuel line

coupling, loose cap nut, etc.

Reﬁ ll engine crankcase with correct type of oil for winter environment.

Add oil. Replace low oil shutdown sensor if necessary.

Check threaded pipe unions tape and tighten unions a required.

See engine manual for corrective action.

Use No. 2-D diesel fuel only. Check the fuel injection pump element and delivery valve assembly and replace as necessary.

PAGE 44 — HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11)

Symptom Possible Problem Solution

Low engine power output and low speed, black exhaust smoke.

Engine overheats.

trOubleShOOtinG

Troubleshooting (Engine) - continued

Air ﬁ lter blocked? Clean or replace air ﬁ lter.

Incorrect valve clearances? Adjust valves per engine speciﬁ cation.

Malfunction at injector? See engine manual.

Too much oil in engine crankcase?

Entire cooling air system contaminated/ blocked?

Fan belt broken or elongated? Change belt or adjust belt tension.

Coolant insufﬁ cient? Replenish coolant.

Radiator net or radiator ﬁ n clogged with dust? Clean net or ﬁ n carefully.

Fan, radiator, or radiator cap defective? Replace defective part.

Thermostat defective? Check thermostat and replace if necessary.

Head gasket defective or water leakage? Replace parts.

Drain off engine oil down to uppermark on

dipstick.

Clean cooling air system and cooling ﬁ n areas.

HHN34TVD RIDE-ON TROWEL • OPERATION MANUAL — REV. #2 (01/10/11) — PAGE 45

OperatiOn Manual

HERE’S HOW TO GET HELP

Multiquip Inc trademarks are the property of their respective owners and used with permission.

This manual

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.

PLEASE HAVE THE MODEL AND SERIAL

NUMBER ON-HAND WHEN CALLING

UNITED STATES

Multiquip Corporate Ofﬁ ce MQ Parts Department

18910 Wilmington Ave. Carson, CA 90746 Contact: mq@multiquip.com

Service Department Warranty Department

800-421-1244 310-537-3700

Technical Assistance

800-478-1244 Fax: 310-943-2238

Tel. (800) 421-1244 Fax (800) 537-3927

Fax: 310-537-4259 800-421-1244

800-427-1244 310-537-3700

310-537-3700

Fax: 800-672-7877 Fax: 310-637-3284

Fax: 310-537-1173

MEXICO UNITED KINGDOM

MQ Cipsa Multiquip (UK) Limited Head Ofﬁ ce

Carr. Fed. Mexico-Puebla KM 126.5 Momoxpan, Cholula, Puebla 72760 Mexico Contact: pmastretta@cipsa.com.mx

Tel: (52) 222-225-9900 Fax: (52) 222-285-0420

Unit 2, Northpoint Industrial Estate, Globe Lane, Dukinﬁ eld, Cheshire SK16 4UJ Contact: sales@multiquip.co.uk

CANADA

Multiquip

4110 Industriel Boul. Laval, Quebec, Canada H7L 6V3 Contact: jmartin@multiquip.com

Tel: (450) 625-2244 Tel: (877) 963-4411 Fax: (450) 625-8664

Tel: 0161 339 2223 Fax: 0161 339 3226

, 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

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.

Your Local Dealer is:

Multiquip HHN34TVD User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual