2003 Komatsu WB140-2N / WB150-2N Shop Manual

Komatsu WB140-2N and WB150-2N (CEBM009800) Shop Manual: 2003 Blueprint-Vault

Engineering-Base: CEBM009800 / Reference-Category: Backhoe Loader / Engine-Type: 4D106-1FA Properly mandating the operation and maintenance of your Komatsu WB140-2N and WB150-2N backhoe loaders, this manual outlines critical procedures and specifications. Featuring a modular arrangement of sections, it details component structures, diagnostic routines, and assembly sequences.

The manual includes coverage of power train systems, including the hydraulic convertor-transmission circuit. Brake system specifications are included for testing the circuits and pump tightness, as well as leak tightness for the braking group. Safety procedures are documented for various operations, including safe handling of heavy components and proper tool usage. Fluid capacities are listed for the engine, along with specifications for oil temperature and fan belt tension. Tool requirements are listed for special tools such as feeler gauges, pressure gauges, and tachometers, essential for accurate adjustments and diagnostics.

This document meticulously details the disassembly and assembly of components, including the front and rear axles, steering cylinder, and the various control valves. Torque specifications for bolts and nuts are provided to ensure proper clamp load consistency. Coverage extends to the hydraulic pump, including its function, structure, and operation, as well as the PC valve, LS valve, and servo piston. It also details the unloading valve, priority valve, and the steering control system pressure, offering a comprehensive look at the machine's hydraulic systems. Specific procedures for air conditioning unit testing and troubleshooting are also included, ensuring optimal performance and comfort.