Komatsu WA470-6R WA480-6R Wheel Loader Shop Manual 2022 – PDF Repair Guide

Description

Komatsu WA470-6R WA480-6R Wheel Loader Shop Manual

This is the complete Komatsu WA470-6R and WA480-6R Wheel Loader Shop Manual, document number SEN06594-09. It is the 9th revision, published October 2022, and covers machines with serial numbers WA470-10001 and up and WA480-10001 and up. This 1,872-page manual is the same comprehensive technical resource used by professional technicians for servicing, repairing, and diagnosing these wheel loaders.

File Details

• Manual type: Shop Manual (Service / Repair)
• Brand: Komatsu
• Models covered: WA470-6R, WA480-6R
• Serial numbers: WA470-10001 and up, WA480-10001 and up
• Engine: Komatsu SAA6D125E-5 diesel engine
• Document number: SEN06594-09
• Revision: 9th revision
• Date: October 2022
• Language: English
• Page count: 1,872
• File format: PDF

Chapters Covered

• 00 Index and Foreword — Table of contents, foreword and general information, safety notice, how to read the shop manual, explanation of terms for maintenance standard, handling of electric equipment and hydraulic components, handling of connectors newly used for engines, how to read electric wire code, precautions when carrying out operation, method of disassembling and connecting push-pull type coupler, standard tightening torque table, conversion table.
• 01 Specification — Specification dimension drawing, specifications, weight table, table of fuel, coolant and lubricants.
• 10 Structure, Function and Maintenance Standard — Engine and cooling system (engine mount, transmission mount, cooling system, cooling fan pump, cooling fan motor); Power train (power train system diagram, drive shaft, piping diagram, torque converter, transmission, transmission control valve, ECMV, main relief valve and torque converter relief valve, axle, differential, limited slip differential, final drive); Steering system (steering column, steering pump, steering valve, orbit-roll valve, stop valve, steering relief valve, steering cylinder, emergency steering motor and pump, joystick steering lever linkage, electrical steering lever, joystick EPC valve); Brake system (brake component layout, brake cooling control system, charge valve, brake valve, accumulator, slack adjuster, brake, parking brake control, parking brake, parking brake solenoid valve, emergency parking brake release valve, brake cooling oil cooler, brake cooling pump motor, brake cooling fan); Undercarriage and frame (axle mount and center hinge pin, tires); Hydraulic system (hydraulic component layout, work equipment control lever linkage, hydraulic tank, power train pump, work equipment pump, work equipment control valve, CLSS, PPC valve, accumulators, work equipment PPC cut-off solenoid valve); Work equipment (linkage, bucket, bucket positioner and boom kick-out, work equipment cylinder); Cab and its attachments (cab, air conditioner); Electrical system (machine monitor system, transmission controller system, work equipment controller system, electric transmission control, kickdown switch and hold switch, load meter cancel switch and load meter subtotal switch, multi-function knob, joystick steering knob, KOMTRAX system, engine starting circuit, engine stopping circuit, preheating circuit, engine power mode selector circuit, engine output derating function, automatic warm-up function, parking brake circuit, sensor).
• 20 Standard Value Table — Standard service value table, standard value table for engine, standard value table for chassis.
• 30 Testing and Adjusting — Related information on testing and adjusting, tools for testing/adjusting/troubleshooting, engine and cooling system testing, power train testing and adjusting, steering system testing and adjusting, brake system testing and adjusting, hydraulic system testing and adjusting, work equipment testing and adjusting, electrical system testing and adjusting, special functions of machine monitor (EMMS), Pm-clinic inspection table.
• 40 Troubleshooting — General information on troubleshooting, failure code table, troubleshooting by failure code (code display), troubleshooting of electrical system (E-mode), troubleshooting of hydraulic and mechanical system (H-mode), troubleshooting of engine (S-mode).
• 50 Disassembly and Assembly — General information, coating materials list, special tools list, sketches of special tools; Engine and cooling system removal/installation; Power train removal/installation and disassembly/assembly of torque converter, transmission, clutch pack, front and rear axle, axle housing, differential; Brake system; Undercarriage and frame; Hydraulic system; Work equipment; Cab and its attachments; Electrical system.
• 80 Appendix (Air Conditioner) — Precautions for refrigerant, troubleshooting procedure, circuit diagram and connector pins, system diagram, detail of air conditioner unit, parts and connectors layout, testing with self-diagnosis function, temperature control testing, vent changeover testing, Fresh/Recirc changeover testing, sensor testing, relay testing, troubleshooting charts, gauge pressure troubleshooting, service tool connection, compressor oil handling.
• 90 Diagrams and Drawings — Symbols used in hydraulic circuit diagrams, power train hydraulic circuit diagram, automatic greasing circuit diagram, hydraulic circuit diagram, hydraulic circuit diagram (brake cooling system), symbols used in electric circuit diagrams, electrical circuit diagram, electrical circuit diagram (brake cooling system), electrical circuit diagram (rear view camera), work equipment controller system electrical circuit diagram, connector list and stereogram.

This Komatsu WA470-6R WA480-6R Wheel Loader Shop Manual provides the complete technical foundation for maintaining and repairing these machines. The structure and function section explains how each component works, giving context for the troubleshooting and repair procedures. The testing and adjusting chapter supplies the measurement conditions, standard values, and judgment criteria needed to diagnose problems accurately. The troubleshooting chapter is organized by failure code, electrical system, hydraulic and mechanical system, and engine symptom, so a technician can follow a logical path from symptom to root cause. The disassembly and assembly chapter includes tightening torques, coating materials, special tools, and step-by-step procedures for major components.

What This Manual Enables You to Do

With the Komatsu WA470-6R WA480-6R Wheel Loader Shop Manual, you can perform the full range of service work on these machines. The engine section covers the SAA6D125E-5 diesel engine, including fuel system, cooling system, and engine control. The power train chapters walk through the torque converter, transmission, clutches, axles, differentials, and final drives. The hydraulic system coverage includes the work equipment pump, steering pump, cooling fan pump, control valves, PPC valves, and accumulators. The brake system is documented from the charge valve through the wheel brakes and parking brake. The electrical system coverage spans the machine monitor, transmission controller, work equipment controller, sensors, starting and stopping circuits, and the KOMTRAX system.

When a failure occurs, the failure code table and the detailed troubleshooting sections let you identify the problem and apply the correct fix. The standard value tables provide the specifications needed to judge whether components are within service limits. The testing and adjusting procedures give the measurement conditions and acceptance criteria for pressures, speeds, temperatures, and electrical signals. The disassembly and assembly chapter provides the order of operations, torque values, and special tools needed to remove and reinstall major components correctly.

Why This Manual Matters

Correct procedures and specifications are essential when servicing the Komatsu WA470-6R and WA480-6R. The machine systems are interconnected — engine, transmission, hydraulics, brakes, and electronics — and a repair performed without the proper reference can introduce new problems or leave the original fault unresolved. This manual gives the technician the exact values, sequences, and diagnostic logic that Komatsu specifies for these models.

The 1,872-page scope covers every major system in detail, from the engine and cooling system through the power train, steering, brakes, hydraulics, work equipment, cab, and electrical systems. The troubleshooting chapters alone — with failure codes, electrical system diagnosis, hydraulic and mechanical system diagnosis, and engine symptom-based troubleshooting — represent an enormous amount of diagnostic information that would be difficult to assemble from any other source.

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Instant PDF Delivery

This Komatsu WA470-6R WA480-6R Wheel Loader Shop Manual is delivered as a PDF file. After purchase, you receive the download link immediately — no shipping, no waiting for a physical book. The PDF can be viewed on any device: computer, tablet, or smartphone. You can print individual pages or entire sections as needed for use in the workshop. The file is fully portable and can be stored on a laptop or tablet for quick reference at the machine.