All information, illustrations and specications in this manual are based on the latest information available at the time
of publishing. The illustrations used in this manual are intended as representative reference views only. Moreover,
because of our continuous product improvement policy, we may modify information, illustrations and/or specications
to explain and/or exemplify a product, service or maintenance improvement. We reserve the right to make any
change at any time without notice. VT LeeBoy, Inc., VT LeeBoy, and LeeBoy are all the same entity and are used
interchangeably.
LeeBoy reserves all copyright and other rights in this manual and the manual’s content. No part of this manual may
be reproduced or used in any way without the written permission of LeeBoy, except as necessary to operate LeeBoy
equipment.
This manual has been most recently updated 03/11 to apply to units with serial number 56635 and higher:
Refer to manual no. 986947 for units with serial number 44987 to 56634.
PDF le last modied on: 03/03/11
Thank you for purchasing the LeeBoy Model 8510B
Conveyor Paver. We wish you many years of safe and
efcient operation of your paver.
READ THIS MANUAL PRIOR TO OPERATING the paver
This manual is an important part of the paver and should
be kept with the paver at all times in the dedicated
storage container on the paver. Even though you may
be familiar with similar equipment, you MUST read and
understand this manual before operating this paver.
Reading the manual will help you and others avoid injury
and help prevent any damage to the paver. If this manual
becomes lost or damaged, contact your authorized
LeeBoy Dealer immediately to order a replacement (see
Contact Information in Section 3).
This manual is intended as a guide for the safe and
efcient use of the paver. This manual covers the
procedures for proper operation and maintenance of
the paver. This manual contains information that was
available at the time of printing and is subject to change
without notice.
This manual should be used with all related
supplemental books, engine and transmission manuals,
and parts books. Related Service Bulletins should be
reviewed to provide information regarding some of the
recent changes.
This manual provides information for use by the
equipment operator under the following headings:
Safety—See Section 2 for important safety guidelines
information.
General Information—See Section 3 for important
warranty, contact, and nameplate information.
Specications—See Section 4 for all major system
specications and typical torque value tables.
Component Location—See Section 5 for general
overview of controls and major components.
Operation—See Section 6 for control functionality and
normal equipment operation.
Maintenance—See Section 7 for basic preventive
maintenance and repair procedures.
Troubleshooting—See Section 8 for problem
descriptions and recommended solution tables.
Schematics—See Section 9 for schematic diagrams of
electrical wiring.
Illustrated Parts List (IPL)—See Section 10 for
illustrations, descriptions and part numbers of available
service parts.
If any questions arise concerning this publication or
others, contact your local LeeBoy Dealer for the latest
available information.
This manual provides important information to familiarize
you with safe operating and maintenance procedures.
Even though you may be familiar with similar equipment,
you MUST read and understand this manual before
operating the LeeBoy Model 8510B Conveyor Paver
and follow its instructions when operating the paver.
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Safety is everyone’s business and is our top concern.
Knowing the guidelines covered in this section and in
Section 1 will help ensure your safety, the safety of those
around you and the paver’s proper operation.
LOOK FOR THESE SYMBOLS WHICH POINT OUT
ITEMS OF EXTREME IMPORTANCE TO THE SAFETY
OF YOU AND YOUR COWORKERS. READ AND
UNDERSTAND THOROUGHLY. HEED THE WARNING
AND FOLLOW THE INSTRUCTIONS.
Keep safety labels in good condition. If safety labels
become missing or damaged, replacement safety labels
are available from your LeeBoy Dealer (see Contact Information in Section 3 and Safety Label Installation
in Section 7).
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Indicates a situation which can cause damage to the
equipment, personal property and/or the
environment, or cause the LeeBoy Model 8510B
Conveyor Paver to operate improperly.
NOTE: Indicates a procedure, practice, or condition
that should be followed in order for the paver or
component to function in the manner intended.
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Safety
Safety Precautions
The safety messages that follow have CAUTION level
hazards.
Pre-Operation Hazard
Read and understand this Operation
Manual before operating or servicing
the engine to ensure that safe operating
practices and maintenance procedures are
followed.
• Never permit anyone to service or operate the LeeBoy
Model 8510B Conveyor Paver without proper training.
• Safety signs and labels are additional reminders for
safe operating and maintenance techniques.
• Contact LeeBoy or an authorized LeeBoy Dealer for
additional training.
• Make sure you are aware of all laws and regulations
that are in effect where the paver is operated. Make
sure you have all necessary licenses to operate the
paver.
Explosion Hazard
While the engine is running or the battery is
charging, hydrogen gas is being produced
and can be easily ignited. Keep the area
around the battery well-ventilated and keep
sparks, open ame and any other forms of
ignition out of the area.
• Always disconnect the negative (-) battery cable
before servicing the paver.
• Do not start the engine by shorting the starter circuit
or any other starting method not stated in this manual.
Only use the starting procedure as described in this
manual to start the engine.
• Never charge a frozen battery. Always slowly warm
the battery to room temperature before charging.
Fire and Explosion Hazard
• Diesel fuel is ammable and explosive under certain
conditions.
• Never use a shop rag to catch the fuel.
• Wipe up all spills immediately.
2
The safety messages that follow have WARNING
level hazards.
Crush Hazard
Keep bystanders away from work area before and
during operation.
Modification Hazard
Never modify the LeeBoy Model 8510B Conveyor Paver
without written consent of LeeBoy. Any modication can
affect the safe operation of the paver and may cause
personal injury or death.
Exposure Hazard
Always wear personal protective
equipment, including appropriate clothing,
gloves, work shoes, and eye and hearing
protection, as required by the task at hand.
• Never refuel with the engine running.
• Store any containers containing fuel in a wellventilated area, away from any combustibles or
sources of ignition.
Fire Hazard
Have appropriate safety equipment
available. Have all re extinguishers
checked periodically for proper operation
and/or readiness.
• Always read and follow safety-related precautions
found on containers of hazardous substances
like parts cleaners, primers, sealants and sealant
removers.
• Undersized wiring systems can cause an electrical
re.
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Safety
Alcohol and Drug Hazard
The safety messages that follow have WARNING
level hazards.
Exhaust Hazard
All internal combustion engines create
carbon monoxide gas during operation and
special precautions are required to avoid
carbon monoxide poisoning:
• Always ensure that all connections are tightened to
specications after repair is made to the exhaust
system.
Entanglement/Sever Hazard
Verify there are no people, obstacles or other
equipment near the LeeBoy Model 8510B Conveyor
Paver before starting the engine. Sound the horn as a
warning before starting the engine.
If the engine must be serviced while it is
operating, remove all jewelry, tie back long
hair and keep hands, other body parts and
clothing away from moving/rotating parts.
• Always stop the engine before
beginning service.
• Verify that all paver guards and covers
are attached properly to the paver before
starting the engine.
• If you must run the engine during maintenance
procedures, make sure you have a helper to keep
bystanders clear of the paver and make observations
of moving parts as requested by the operator.
• Always turn the start switch to the OFF position after
operation is complete and remove the key from the
switch. Keep the key in your possession when the
paver is not operating.
• Attach a “Do Not Operate” tag near the key switch
while performing maintenance on the equipment.
• Never operate the engine while wearing a headset to
listen to music or radio because it will be difcult to
hear the warning signals.
• Always start the engine or operate the controls while
you are seated in the operators seat.
Never operate the engine or 8510B Paver
while under the inuence of alcohol or
drugs, or when ill.
Piercing Hazard
Avoid skin contact with high-pressure hydraulic uid or
diesel fuel spray caused by a hydraulic or fuel system
leak such as a broken hydraulic hose or fuel injection
line. High-pressure hydraulic uid or fuel
can penetrate your skin and result in
serious injury. If you are exposed to highpressure hydraulic uid or fuel spray, obtain
prompt medical treatment.
• Never check for a hydraulic uid or fuel leak with your
hands. Always use a piece of wood or cardboard.
Have your authorized LeeBoy Dealer or distributor
repair the damage.
Flying Object Hazard
Always wear eye protection when cleaning
the LeeBoy Model 8510B Conveyor Paver
with compressed air or high-pressure
water. Dust, ying debris, compressed air,
pressurized water or steam may injure your
eyes.
Coolant Hazard
Wear eye protection and rubber gloves
when handling engine coolant. If contact
with the eyes or skin should occur, ush
eyes and wash immediately with clean
water.
Burn Hazard
Some of the paver surfaces become very
hot during operation and shortly after
shutdown.
• Keep hands and other body parts away
from hot paver surfaces.
• Handle hot components with heat-resistant gloves.
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Safety
The safety messages that follow have CAUTION level
hazards.
Poor Lighting Hazard
Ensure that the work area is adequately illuminated.
Always install wire cages on portable safety lights.
Tool Hazard
Always use tools appropriate for the task at hand and
use the correct size tool for loosening or tightening
LeeBoy Model 8510B Conveyor Paver parts.
Working Under Hopper of Paver
Always use the safety brace provided .
When working under hopper of paver use safety
brace provided.
The safety messages that follow have NOTICE level
hazards.
Any part which is found defective as a result of
inspection or any part whose measured value does not
satisfy the standard or limit must be replaced.
Always tighten components to the specied torque.
Loose parts can cause LeeBoy Model 8510B Conveyor
Paver damage or cause it to operate improperly.
Only use replacement parts approved by LeeBoy. Other
replacement parts may affect warranty coverage.
Follow the guidelines of the EPA or other
governmental agencies for the proper
disposal of hazardous materials such as
engine oil, diesel fuel and engine coolant.
Consult the local authorities or reclamation
facility.
Clean all accumulated dirt and debris away from the
body of the paver and its components before you
inspect the paver or perform preventive maintenance
procedures or repairs. Operating a paver with
accumulated dirt and debris will cause premature wear
of paver components. Accumulated dirt and debris also
hinders effective paver inspection.
2
Retrieve any tools or parts that may have dropped inside
of the paver to avoid improper paver operation.
Dispose of hazardous materials in accordance with
all applicable laws and regulations. Never dispose of
hazardous materials by dumping them into a sewer, on
the ground, or into groundwater or waterways.
If any alert indicator illuminates during paver operation,
stop the engine immediately. Determine the cause and
repair the problem before continuing to operate the
paver.
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Safety
Safety Label Locations
Safety Precautions
If your LeeBoy Model 8510B Conveyor Paver has been
repainted, it is extremely important that all the decals
referring to CAUTION, WARNING, and DANGER be
replaced in their proper locations. The illustrations
on this page will aid you in determining the proper
locations; for additional help, you should refer to the
parts listing in the parts section of this manual and note
the description column.
A description of location is provided below for each
safety label. For additional instructions, contact your
dealer (see Contact Information in Section 3).
NOTE: It is the responsibility of the owner and operator
to make sure that all safety labels are readable
and located on paver as designated by LeeBoy.
8510B Conveyor Paver Safety Labels and Safety Label Locations
Figure 2-1
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Safety
2
8510B Electric Screed Safety Labels and Safety Label Locations
1. Subject to the limitations, exclusions, and claims
procedures set forth herein, LeeBoy warrants [to
the rst retail purchaser] that this product will be
free from [substantial] defects in materials and
workmanship during the warranty period.
2. If a defect in material or workmanship is found, your
authorized LeeBoy Dealer is to be notied during
the warranty period. LeeBoy and its authorized
Dealer will repair or replace any part or component
of the unit or part that fails to conform to the
warranty during the warranty period.
3. The warranty period will begin on the initial startup, training and delivery of the unit by the Dealer
to the customer, and will expire after twenty-four
(24) months following the delivery of the paver to
the rst retail purchaser. (See Dealer for additional
warranty).
4. Manufacturers’ Warranties: Engines are warranted
by their manufacturers and may have warranty
coverage that differs from that of LeeBoy. LeeBoy
does not warrant any engine.
5. Replacement parts furnished by LeeBoy are
covered for the remainder of the warranty period
applicable to the unit or component in which such
parts are installed.
6. LeeBoy has the right to repair any component or
part before replacing it with a new one.
7. All new replacement parts purchased by a LeeBoy
Dealer will carry a six-month warranty.
8. This Limited Warranty is governed by the laws of the
State of North Carolina.
THE FOREGOING WARRANTY IS EXCLUSIVE AND
IN LIEU OF ALL OTHER EXPRESSED, STATUTORY
AND IMPLIED WARRANTIES APPLICABLE TO
UNITS, ENGINES, OR PARTS INCLUDING WITHOUT
LIMITATION, ALL IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR USE OR PURPOSE OR AGAINST
INFRINGEMENT.
Limitations
LeeBoy has no obligation for:
1. Any defects caused by misuse, misapplication,
negligence, accident or failure to maintain or use
in accordance with the most current operating
instructions.
2. Unauthorized alterations.
3. Defects or failures caused by any replacement
parts or attachments not manufactured by or
approved by LeeBoy.
4. Failure to conduct normal maintenance and
operating service including, without limitation,
providing lubricants, coolant, fuel, tune-ups,
inspections or adjustments.
5. Unreasonable delay, as established by LeeBoy, in
making the applicable units or parts available upon
notication of a service notice ordered by same.
6. Warranty Responsibility: The warranty responsibility
on all engines rests with the manufacturer of the
engine.
7. Warranty and Parts Support: LeeBoy may
have support agreements with some engine
manufacturers for warranty and parts support.
However, LeeBoy does not warrant the engine.
8. This Limited Warranty sets forth your sole remedy
in connection with the sale or use of the LeeBoy
product covered by this Limited Warranty.
9. This Limited Warranty extends only to the rst retail
purchaser, and is not transferable.
10. In the event any portion of this Limited Warranty
shall be determined to be invalid under any
applicable law, such provision shall be deemed null
and void and the remainder of the Limited Warranty
shall continue in full force and effect.
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General Information
Items Not Covered
LeeBoy is not responsible for the following:
1. All used units or used parts of any kind.
2. Repairs due to normal wear and tear or brought
about by abuse or lack of maintenance of the
Machine.
3. Attachments not manufactured or installed by
LeeBoy.
4. Liability for incidental or consequential damages of
any type including, but not limited to, lost prots or
expenses of acquiring replacement equipment.
5. Miscellaneous charges.
Other Limitations
IN NO EVENT, WHETHER AS A RESULT OF BREACH
OF CONTRACT OR WARRANTY OR ALLEGED
NEGLIGENCE OR LIABILITY WITHOUT FAULT, SHALL
LEEBOY BE LIABLE FOR SPECIAL, INCIDENTAL OR
CONSEQUENTIAL DAMAGES INCLUDING, WITHOUT
LIMITATION, LOSS OF PROFIT OR REVENUE, COST
OF CAPITAL, COST OF SUBSTITUTED EQUIPMENT,
FACILITIES OR SERVICES, DOWNTIME COSTS,
LABOR COSTS OR CLAIMS OF CUSTOMERS,
PURCHASERS OR LESSEES FOR SUCH DAMAGES.
IN NO EVENT WILL WARRANTY COMPENSATION,
OR OTHER DAMAGES AVAILABLE FROM LEEBOY,
EXCEED THE PURCHASE PRICE OF THE PRODUCT.
3
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General Information
Contact Information
For information regarding parts and repairs about your
LeeBoy product, rst contact the dealer you purchased
your product from.
Sales Representative:
Dealership Name:
Dealership Address:
Dealership Phone:
Record of Ownership
Please ll out the following information and use it
when you need to contact LeeBoy for service, parts or
literature.
Paver Model Number:
Paver Serial Number:
Date of Purchase:
Nameplate
If you have a persistent problem your dealer is unable to
resolve, contact LeeBoy directly.
Record dealer information in the space provided.
For additional information about LeeBoy, please visit:
www.leeboy.com.
Nameplate (Figure 3-1) contains the specic model
number and serial number used to identify the
components for any parts or service information.
The descriptions and specications provided in this
section are applicable to the LeeBoy Model 8510B
Conveyor Paver.
This section contains a description of how the major
components operate. It also includes specications for
the major system components. Included in this section
are paver weights, dimensions, performance, and major
system specications for the paver.
Engine
The LeeBoy Model 8510B Conveyor Paver uses either
a Kubota, V3600-T-E3B 84.5 HP or CAT, C3.4 T NA 83
HP four-cylinder engine to drive the hydraulic function
pump and steering pump. The engine is mounted near
the center of the paver and is accessible through
several access doors in the engine cover.
A fuel lift pump mounted on the engine draws diesel fuel
from the fuel tank. The fuel tank is mounted at the right of
the engine compartment.
An air cleaner is mounted on the top of the right-hand
pump cover. The air cleaner removes ne particles such
as dust, sand, chaff and lint from the air.
As air is taken into the air cleaner assembly, a cyclone
type action deposits some of the ne particles in the
evacuator mounted on the bottom of the air cleaner
housing. The evacuator is held closed during engine
operation by suction. When the engine is shut off the
weight of the debris helps to open the rubber aps
allowing the debris to fall out. The rubber aps can also
be squeezed to open for cleaning.
Primary and secondary fuel lters remove contaminants
from the diesel fuel before the fuel ows to the injection
pump for injection into the engine combustion chamber.
A radiator mounted on the left side of the unit cools the
engine. As coolant ows through the radiator, airow
from the engine-driven fan removes heat from the
coolant.
Hydraulic System
The hydraulic system includes four hydraulic pumps
driven by the engine: 1) Left Drive Pump, 2) Right Drive
Pump, 3) Conveyor Pump, 4) Auger and Cylinder Pump.
The auxiliary pumps are mounted on the rear of the drive
pumps, to the right side of the engine, and driven by the
drive pump output shaft. This gear type pump provides
hydraulic ow to operate all the hydraulic cylinders used
to control the paver functions.
Each auxiliary pump has it’s own suction hose from the
tank. The conveyor pump will also charge the Left and
Right Drive Pumps.
Torque Hubs
The paver drive system contains two torque hubs. The
torque hubs provide power to propel the tracks.
Hopper
The hopper wings are hydraulically controlled to raise
and lower. The hopper wings also hinge in and out to
allow for more compact transportation. The hopper
when fully open can hold a payload up to 7 tons.
Material in the hopper is moved toward the back of the
paver to the screed by conveyors. Each conveyor is
activated independently at the operator platform and is
controlled on and off with limit switches.
Augers
The Augers rotates clockwise (CW) and counter
clockwise (CCW) to assist in moving material from the
conveyors to the screed. The augers can be manually
controlled at the operator platform on the paver or by
the screed operator on the screed.
The auger can also be controlled automatically when
the sonic auger system is installed and active. The sonic
auger sensor mounted on the screed end gates detect
the amount of material present and control the auger to
keep the material ow constant.
Refer to the engine owner’s Operation and Maintenance
Manual for a complete description of the engine.
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Operator Platform
The operator platform allows easy and convenient
control of most all functions of the paver and screed.
The paver can be operated from either the left-hand or
right-hand side depending on which control panel side
is active and best suited to the working conditions.
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Specications
Screed
The Screed is the last part of the paver that contacts
the paved material. Operation of the screed is usually
done by the screed operator. Paving material is fed from
the hopper and conveyor to the augers to the front of
the Screed. The Screed has hydraulically controlled
extensions that move in and out to allow a wider paving
base from 8 ft up to 15 ft.
Screed heating is accomplished by either LPG burners,
or by electric heating elements mounted directly to the
wear plates.
The hydraulically driven vibrators mounted on the main
screed frame can be used to increase paving material
compaction.
Electrical System
The electrical system is powered by a 12-volt battery
mounted in the engine compartment located under
the covers on the right side of the paver forward of the
operator’s platform.
The battery produces 12 volts DC and maintains 1125
cold cranking amperes (CCA). An engine-mounted
alternator capable of at least 60 amperes charging
capacity keeps the battery charged during normal
operation. The battery charge rate can be monitored
using the voltmeter on the center operator dash panel.
Electrically heated pavers come equipped with a
generator. The generator is mounted on the paver under
the hopper oor near the right hand track.
The generator is hydraulically driven by the rst section
of the rear pump on the engine pump stack. When the
paver is at full rpm, and the hydraulic system is at normal
operating temperature, the generator should operate
at a sufcient speed to produce between 220VAC and
240VAC.
All LeeBoy generators are equipped with an integrated
generator speed control manifold. This manifold should
not require adjustment, but if there is a need to ne tune
the generator speed, there is an adjustment on the
manifold (see Generator Speed Tuning in Section 7).
Generator speed tuning should only be
done by an authorized LeeBoy Dealer.
All output power from the generator is passed through
the main breaker for safety. All output power is lost
when this breaker is in the “tripped” or “off” position. The
location of the generator main output breaker is shown
in Figure 6-22.
The paver has heating controls to provide the necessary
connection and control of the output power from the
generator to the heating elements. It is necessary to
maintain all components of the heating controls system
in good working order to maintain safe and efcient
screed heating.
The Heating Control or Distribution/Control Box is
mounted near the middle of the screed and is easily
accessible to the screed operator when a heating cycle
is required.
4
There is a ve second delay after the heat cycle is
initiated before the actual electric load is sent to the
heating elements from the generator. This delay is to
allow the generator to reach optimal operating speed
before the electrical load is required.
Once the heat cycle is started, a pre-programmed timer
controls the amount of time for output power from the
generator to go through the element connection supply
plugs coming out of the bottom of the Heating Control
Box to the heating elements.
Any element lead can be plugged into any supply plug
under the heating control/distribution box. All six plugs
are equally rated.
Each element is sized to t properly in your screed, and
provide sufcient power to heat your screed plate to a
temperature that mix will not drag or stick to the lower
surface of the screed plate.
To know that the element is correct, you should read a
resistance between 28 ohms and 60 ohms (see Testing Element Relays in Section 7).
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Specications
Specification charts
The specications provided in this section are
applicable to the LeeBoy Model 8510B Conveyor Paver.
Included in this section are specications for paver
weights, dimensions, performance, and torque values for
both metric and standard inch fasteners.
Replace original equipment only with
LeeBoy approved components.
Table 4-1. Dimension Specications (See Figure 4-1)
Manufacturer and ModelKubota, V3600-T-E3B
Emission RegulationTier 3 / Stage III A
TypeVertical 4-cycle Liquid Cooled Diesel
Number of Cylinders4
Bore, Stroke, and Displacement3.86” (98 mm) ; 4.72” (120 mm); 220.9 in
Combustion SystemDirect Injection
Intake SystemTurbocharged
Power Rating kW - HP63.0 kW - 84.5 HP
Maximum Speed2400 to 2500 rpm
3
(3.62 L)
Fuel Filter TypeKubota Diesel
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