Komatsu WB140PS-2 and WB150PS-2 Power-Shift Backhoe Loader Shop Manual (WEBM004300)

Komatsu issued three shop manuals for the WB140PS-2 and WB150PS-2 as production went on. WEBM004300 is the middle edition, covering a short serial span.

Fits

WB140PS-2 from serial 140F50092 and WB150PS-2 from 150F50020. The other editions are WEBM002502 (from 140F50001 / 150F50001) and WEBM004700 (from 140F50098 / 150F50032). All three are in our catalog, so go by your serial plate.

Quick facts

• Manual Number: WEBM004300
• Models: WB140PS-2, WB150PS-2
• Serials: 140F50092 / 150F50020 and up
• Drive: Power-shift
• Machine Type: Backhoe loader
• Format: PDF, 494 pages

What's in it

The structure and function chapter covers the power-shift transmission, front and rear axles, hydraulic pump, loader and backhoe valves, cylinders and steering. The electrical system and sensors have their own chapter. Testing, adjusting and troubleshooting gives you the pressures and checks for the usual complaints, such as slipping in gear, slow backhoe and weak loader. Disassembly and assembly follows, then the maintenance standards and wear limits.

A few pages carry a PC15R-8 footer from the original file. The content is for the backhoes.

Table of contents

• Structure and function: power-shift transmission, front and rear axles, hydraulic pump, loader and backhoe valves, cylinders and steering
• Electrical system and sensors
• Testing, adjusting and troubleshooting
• Disassembly and assembly
• Maintenance standards and wear limits

Good to know

A tip from shops that use these books every day: read the structure and function pages for a system before you start testing it. Knowing how the valves and circuits are meant to work makes the test results much easier to read. The standard values then tell you whether a reading is normal, borderline or out of spec, and the wear limits decide whether a part goes back in.

Before you buy

With three editions covering close serial ranges, check your plate before you order.

PDF, 494 pages, English. Download link straight after checkout. We're an independent seller with no link to Komatsu.