Komatsu WA500-3 Wheel Loader Shop Manual 50001 and Up – Full Service & Repair PDF

Description

File Details

• Manual Type: Factory Shop Manual
• Brand: Komatsu
• Model: WA500-3 Wheel Loader
• Serial Number Range: 50001 and up
• Engines Covered: S6D140E-2, SA6D140E-3
• Document Number: SEBM009014
• Page Count: 1274 pages
• File Format: PDF
• Language: English

Chapters Covered

• 01 GENERAL — General assembly drawing, specifications, weight table, list of lubricant and water
• 10 STRUCTURE AND FUNCTION — Radiator and oil cooler, damper, torque converter and transmission piping, power train hydraulic circuit, torque converter and PTO, transmission, transmission control valve, ECMV, main relief and torque converter relief valve, lubricating relief valve, torque converter oil filter, pilot filter, transfer, drive shaft, center support, axle, differential, limited slip differential, final drive, axle mount, center hinge pin, steering piping, steering column, steering valve, orbit-roll valve, stop valve, diverter valve, brake piping and circuit diagram, brake valve, charge valve, accumulator, slack adjuster, brake, parking brake control, parking brake, parking brake solenoid valve, emergency release solenoid valve, hydraulic piping, hydraulic circuit system, work equipment hydraulic circuit diagram, work equipment lever linkage, hydraulic tank, accumulator (PPC), PPC valve, PPC relief valve, cut-off valve, E.C.S.S. control valve, main control valve, work equipment linkage, bucket, bucket positioner and boom kick-out, proximity switch operation, cab, ROPS canopy, air conditioner, electric circuit diagram, machine monitor system, main monitor, maintenance monitor, all-range electronic control automatic transmission system, joystick transmission system, E.C.S.S., transmission and E.C.S.S. controller, work equipment control system, remote position joystick steering controller, sensors, engine starting circuit, engine stop circuit, preheating circuit, electric transmission control, kick-down and hold switch, electric parking brake control
• 20 TESTING AND ADJUSTING — Standard tightening torque, electric wire code, conversion tables, units, testing and adjusting procedures, troubleshooting of main monitor system (M MODE), troubleshooting of ECSS (D MODE), troubleshooting of engine controller system (ENG MODE)
• 30 DISASSEMBLY AND ASSEMBLY — General assembly, component removal and installation, disassembly and assembly procedures
• 40 MAINTENANCE STANDARD — Inspection and judgment standards for disassembled parts
• 90 OTHERS — Hydraulic circuit diagrams, electric circuit diagrams

What This Manual Covers

The Komatsu WA500-3 Wheel Loader Shop Manual is the comprehensive technical resource for professional mechanics and technicians servicing the WA500-3 wheel loader, covering serial numbers 50001 and up. This manual is divided into six major sections, each addressing a critical area of the machine’s service and repair. Note that this shop manual covers the chassis, hydraulics, electrical, and power train systems; for engine overhaul details, the 6D140-2 or 140-3 Series Engine Shop Manual is referenced separately.

The STRUCTURE AND FUNCTION section provides detailed explanations of the machine’s major systems, including the power train, transmission, axles, differential, final drive, steering, brakes, and work equipment hydraulics. Each component’s structure and operation are described with detailed cross-sectional diagrams, hydraulic schematics, and power flow illustrations. This section serves as both a learning tool for understanding the machine’s design and a reference for troubleshooting. The transmission section alone covers the 4-forward, 4-reverse planetary gear transmission, transfer, and transmission control valve in significant detail, including clutch operation, power flow for each gear range, and ECMV function.

The TESTING AND ADJUSTING section is perhaps the most valuable for day-to-day service work. It covers the procedures for checking and adjusting the machine’s systems, including the transmission controller’s initial teaching method, main monitor adjustments, and extensive troubleshooting procedures organized by system. The troubleshooting sections (M MODE for the main monitor, D MODE for the ECSS, and ENG MODE for the engine controller) provide systematic diagnostic procedures for identifying and resolving electrical and electronic system faults. Error code tables, electrical circuit diagrams, and step-by-step test procedures help technicians quickly pinpoint issues in the main monitor system, ECSS, and engine controller system.

The DISASSEMBLY AND ASSEMBLY section provides step-by-step procedures for removing, installing, disassembling, and assembling each major component. Every procedure includes precautions, required tools, and tightening torques. The MAINTENANCE STANDARD section gives the judgment standards for inspecting disassembled parts, helping technicians determine whether components are within service limits or require replacement. The OTHERS section contains complete hydraulic and electrical circuit diagrams, which are essential for understanding the machine’s complex systems and diagnosing faults.

Technical Specifications Included

This manual includes the complete specifications for the WA500-3, including:

• Engine: S6D140E-2 and SA6D140E-3, 4-cycle water-cooled in-line 6-cylinder direct injection with turbocharger, 15.2L displacement, 235 kW (315 HP) at 2,100 rpm, 1,372 Nm torque at 1,400 rpm
• Transmission: Planetary gear, constant-mesh multiple-disc, hydraulically actuated, 4 forward and 4 reverse speeds
• Axles: Front fixed-frame full-floating, rear center pin support type full-floating
• Hydraulic System: Work equipment pump 348 L/min, steering pump 172 L/min, set pressure 20.6 MPa (210 kg/cm²)
• Brakes: Front/rear wheel wet disc, hydraulically actuated, parking brake drive shaft wet type disc
• Tires: 26.5 x 25 – 20 PR (L3), inflation pressure front 440 kPa, rear 340 kPa
• Operating Weight: 27,600 kg (28,220 kg for 52001 and up)
• Bucket Capacity: 4.3 m³
• Travel Speeds: Forward 1st 6.7 km/h, 2nd 12.0 km/h, 3rd 20.2 km/h, 4th 33.0 km/h

Standard Torque Specifications

The manual includes comprehensive tightening torque tables for standard metric bolts and nuts, flared nuts, split flange bolts, O-ring boss piping joints, O-ring boss plugs, hoses (taper seal and face seal types), and Cummins engine bolts, nuts, eye joints, and tapered screws. These tables ensure that every fastener is tightened to the correct specification during assembly and repair.

Why This Manual Matters

Proper service and repair is essential for safe machine operation. The Komatsu WA500-3 is a complex piece of heavy equipment with sophisticated hydraulic, electrical, and powertrain systems. Without the correct procedures and specifications, even routine maintenance can lead to costly damage or unsafe operating conditions. This manual provides the exact procedures, torque values, pressure settings, and diagnostic steps that Komatsu technicians use. Whether you’re performing routine maintenance, diagnosing a fault in the transmission control system, or rebuilding a final drive, this manual gives you the information you need to do the job correctly. The troubleshooting sections are particularly valuable, providing systematic diagnostic procedures for the machine’s electronic control systems. With error code tables, electrical circuit diagrams, and step-by-step test procedures, you can quickly identify and resolve faults in the main monitor system, ECSS, and engine controller system.

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This Komatsu WA500-3 Wheel Loader Shop Manual is delivered as a high-quality PDF file that can be viewed on any computer, tablet, or smartphone. The PDF format allows you to zoom in on detailed diagrams, print specific pages for use in the workshop, and search for specific topics. After payment, you’ll receive an instant download link – no shipping, no waiting. Whether you’re a professional mechanic, a fleet maintenance manager, or a heavy equipment owner, this manual is an essential resource for keeping your WA500-3 running reliably.