Table of Contents
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Unsafe use of this machine may cause serious injury
or death. Operators and maintenance personnel
must read this manual before operating or maintain-
ing this machine. This manual should be kept near the
machine for reference and periodically reviewed
by all personnel who will come into contact with it.
Komatsu has Operation & Maintenance Manuals written in
some other languages. If a foreign language manual is
necessary, contact your local distributor for availability.
WA20
WA40
WHEEL LOADER
SERIAL NUMBERS
NOTICE
,WA30
-2
,WA50
-3
WA20 - 11270
WA30 - 18970
and up
WA40 - 13530
WA50 - 20642
SEAM010700
-5
-3
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Table of Contents
Related Manuals for Komatsu WA40-3
Summarization of Contents
Safety Information
General Precautions
Essential safety rules, features, clothing, modifications, and operating environment precautions.
Precautions During Operation
Before Starting Engine
Worksite safety, fire prevention, and checks inside the operator's cab before starting.
Handling High Temperatures and Flammables
Precautions when handling fuel, oil, and hot components to prevent fires and burns.
Preventing Crushing and Hazards
Safety measures against asbestos dust, crushing hazards, and the importance of fire extinguishers.
ROPS and Attachment Safety
Safety guidelines for using ROPS and optional attachments.
Precautions for Maintenance
Preparing for Maintenance
Procedures and tools for maintenance, including warning tags and proper tools.
During Maintenance Safety
Safety for personnel, attachments, working under the machine, and keeping it clean.
Tires and Waste Handling
Safe handling, replacement of tires, and proper disposal of waste materials.
Explanation of Components
Meter, Lamps, and Gauges
Explanation of the instrument panel displays including engine temperature, fuel, and HST gauges.
Switches and Control Levers
Operation of starting switch, lamps, signals, horn, and various control levers and pedals.
Operation
Pre-Operation Checks
Daily checks including pilot lamps, coolant, fuel, oil levels, brakes, and steering.
Engine Starting and Warm-up
Procedures for normal and cold weather starting, and engine warm-up operations.
Machine Movement and Control
Steps for moving off, changing direction, turning, stopping, and parking the machine.
Work Equipment and Loader Operations
Operating lift arm, bucket, and performing tasks like digging, leveling, loading, and carrying.
Operation Precautions
Guidelines for water depth, slopes, driving, and work equipment adjustments.
Transportation
Loading, Unloading, and Securing
Safety and procedures for loading, unloading, and securing the machine for transport.
Lifting Machine Safely
Precautions and methods for lifting the machine using proper equipment.
Cold Weather Operation
Low Temperature Precautions
Guidance on fuel, lubricants, coolant, and battery for low-temperature operation.
Post-Work and After Cold Weather Care
Procedures for preventing freezing after work and preparing for warmer weather.
Troubleshooting
Engine and Fuel System Issues
Resolving problems like running out of fuel or engine starting issues.
Chassis and Hydraulic System Issues
Diagnosing and fixing problems with the chassis, brakes, HST, and hydraulic systems.
Battery and Electrical System Issues
Troubleshooting battery discharge, charging, booster cable use, and wiring faults.
Maintenance Schedules and Procedures
General Maintenance Guidelines
General practices for maintenance, using genuine parts, and keeping the machine clean.
Service Procedures by Interval
Detailed steps for initial, 50, 250, 500, 1000, and 2000-hour service items.
Specifications
Model-Specific Specifications
Detailed performance, weight, and engine specifications for WA20-2, WA30-5, WA40-3, and WA50-3.
Options, Attachments, and Cab Equipment
Optional Parts and Attachments
List of available optional parts and their specifications for different machine models.
Seat Belt and Cab Features
Instructions for seat belt use and operation of cab switches like wipers and heater.
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