LeeBoy 785 User Manual

293 pages

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785 MOTOR GRADER

OPERATIONS, SERVICE

AND PARTS MANUAL

785 MOTOR GRADER MANUAL

Manual No. 985480

Courtesy of Machine.Market

Questions and Answers:

J
John Cohen DDSAug 13, 2025
What to do if my LeeBoy Farm Equipment engine turns over but won't start?
- T
  Tim WardAug 13, 2025
  If your LeeBoy Farm Equipment engine turns over but doesn't start, here are some things to check: * Verify the fuel level in the tank. * Drain and refill the fuel tank if the fuel is contaminated. * Check the fuel cutoff. * Remove the fuel cap and listen for air entering the tank rapidly to ensure the fuel tank vent isn't clogged. * Repair or replace the fuel pump if it's faulty. * Clean or replace the air filter element if it's restricted. * Check voltage to injection transfer pump. * If the engine is flooded, turn off the fuel valve under the tank and turn the engine over until it clears out the cylinders and starts. Once it starts, turn the fuel valve back on.

LeeBoy 785 Specifications

General

Brand	LeeBoy
Model	785
Category	Farm Equipment
Language	English

Summary

IMPORTANT SAFETY INSTRUCTIONS

DANGER

Highlights critical safety notes that could cause serious injury or death if not followed.

WARNING

Emphasizes important safety notes that could cause serious injury to yourself or others.

CAUTION

Points out potential hazards that could cause physical harm or equipment damage.

SAFETY PRECAUTIONS

Stresses the importance of replacing safety decals and provides guidance on their location.

785 DECALS and DECAL LOCATIONS

Illustrates decal locations for safety and warnings on the motor grader.

Section 2 SPECIFICATIONS

TABLE 2-1. ENGINE SPECIFICATIONS

TABLE 2-4. PERFORMANCE SPECIFICATIONS

TABLE 2-12. TORQUE SPECIFICATIONS FOR STANDARD INCH FASTENERS

TABLE 2-13. TORQUE SPECIFICATIONS FOR METRIC FASTENERS

Section 3 OPERATION

OPERATING CONTROLS AND GAUGES

Refers to figures and tables for identifying and understanding machine controls and gauges.

SAFETY GUIDELINES

Consolidates general safety guidelines for operation, stopping, and maintenance.

INSPECTION PROCEDURES

Covers daily inspection, receiving inspection, and pre-start checks for safe operation and longevity.

PREPARING TO DRIVE

Details steps before driving, including console adjustment, HVAC, and cabin features.

DRIVING THE MACHINE

Explains the start-up procedure, including safety precautions and engine idling.

DRIVING MODES AND OPERATIONS

Explains how to operate the machine in automatic and manual transmission modes.

MACHINE CONTROL LEVERS AND FUNCTIONS

Explains the function and operation of various machine controls like blade lift and tilt levers.

GRADING PROCEDURES

TRANSPORTATION PROCEDURES

Covers procedures and safety precautions for loading and towing the grader.

Section 4 MAINTENANCE

FUELS AND LUBRICANTS

PREPARING FOR MAINTENANCE

Steps to take before performing maintenance, including parking and lowering equipment.

MAINTENANCE SCHEDULE

Summarizes scheduled maintenance tasks by intervals (As Required, 10, 50, 250, 500, 1000 hours).

SCHEDULED MAINTENANCE PROCEDURES

AS REQUIRED PROCEDURES

10 HOUR PROCEDURES

Engine Oil Level Check

50 HOUR PROCEDURES

250 HOUR PROCEDURES

Engine Oil and Filter Change

Step-by-step guide for changing engine oil and replacing oil and fuel filters.

500 HOUR PROCEDURES

1000 HOUR PROCEDURES

2000 HOUR PROCEDURES

Cooling System Maintenance

Fuel Filter Sediment Draining

Air Cleaner Element Replacement

Fuses, Circuit Breakers, and Neutral Start

CHECKS AND ADJUSTMENTS

Windshield Wiper and Wheel/Tire Replacement

Details wiper replacement and procedures for replacing front and rear wheels and tires.

HYDRAULIC DIAGRAMS

HYDRAULIC SCHEMATICS

Contains diagrams illustrating the machine's hydraulic system.

TROUBLESHOOTING

ENGINE PROBLEMS

Lists common engine symptoms, their causes, and recommended remedies.

HYDRAULIC SYSTEM PROBLEMS

Provides troubleshooting for hydraulic system issues like the grader not moving or slow functions.

ELECTRICAL SYSTEM PROBLEMS

Addresses troubleshooting for electrical issues like starter problems and horn not sounding.

POWER TRAIN PROBLEMS

Troubleshooting common power train issues such as transmission overheating and vibration.

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