Komatsu WB97R-2 Backhoe Loader Shop Manual, 2001–2007 (P/N WEBM001000)

This Komatsu America Corp. shop manual (P/N WEBM001000), printed in July 2007, covers the 2001–2007 Komatsu WB97R-2 backhoe loader, serial number 97F20001 and up.

PDF Search, Bookmarks, and Wiring Detail

Finding text and reading diagrams: Embedded bookmarks open the main chapters and individual procedures. Text search works for some content, and results vary by PDF reader. Zoom in to read small connector numbers, pin labels, and wire codes on the wiring diagrams.

The download is one printable English PDF with 434 pages, including the original cover and 19 layout pages that contain only a running header, footer, or page number.

Hydraulic Testing, Drivetrain Service, and Component Repair

These selected topics show the scope of the shop manual. It also covers brake-pedal linkage adjustment and setup of the return-to-dig sensor.

• Hydraulic pump and steering: Closed Center Load Sensing System (CLSS) operation, pump delivery tests in Power and Economy modes, and steering pressure checks.

• Transmission and torque converter: Transmission section views, forward and reverse clutch pressure tests, converter load checks, and transmission removal and installation.

• Axles and final drives: Front and rear axle disassembly and assembly, differential backlash checks, bevel-pinion bearing preload, and rear final-drive service.

• Engine and fuel system: Valve clearance, compression testing, injection timing, and removal and installation of the injection pump, turbocharger, and cylinder head.

• Loader and backhoe: Hydraulic drift diagnosis, cylinder disassembly and assembly, and removal and installation of the front loader and backhoe working equipment.

• Electrical and cab systems: Wiring diagrams with component and connector legends, a fuse-and-relay layout, and pressure and outlet-temperature checks for the air-conditioning system.

The manual is written for heavy-equipment technicians and experienced mechanics familiar with hydraulic pressure testing, lifting assemblies, and checking bearing preload and gear backlash.

Hydraulic Drift and Cylinder Repair

The hydraulic circuit schematic shows how the pump, steering, and attachment valves are connected. The drift tests help distinguish leakage through a control valve from leakage past a cylinder seal before parts are removed.

The cylinder repair section distinguishes the side-digging boom cylinder head from the standard cylinder assemblies. It also identifies seals and sliding surfaces that can be damaged during reassembly.

Transmission, Axles, and Serial-Specific Procedures

The torque converter and transmission circuit diagram shows the relationship between the converter, clutch control circuits, and oil cooler. The TBG version has separate converter load-test conditions. Transmission coverage includes removal and installation, section views, and service standards. The axle chapters provide internal disassembly and assembly procedures.

The starting motor, alternator, cab, and several front loader procedures distinguish machines through serial number 97F20171 from those starting at 97F20172. Oil capacity tables cover the crankcase, hydraulic circuit, and axle reservoirs. Separate torque tables cover standard fasteners and flared fittings.

Follow the manual’s safety precautions and your shop’s lockout/tagout procedures before disassembly.

Steering and Air-Conditioning Test Values

The steering pressure check specifies 175 ± 7 bar at full steering travel in either direction, with the engine at operating temperature and running at 1,500 ± 50 rpm and the hydraulic oil at 55–60 °C.

The air-conditioning technical data lists a normal operating pressure of 15–17 bar and a low-side pressure of 1.6–1.8 bar at 2,500 rpm and 25–30 °C ambient temperature.