Komatsu SK1020-5 and SK1020-5 Turbo Skid-Steer Loader Shop Manual (WEBM005300)

The SK1020-5 came with a naturally aspirated engine or a turbo, and WEBM005300 covers both versions in one 250-page shop manual. The rest of the machine is shared, so a single book does the job.

Fits

SK1020-5 from serial 37CF00004, with the 4D98E-2NFE engine. SK1020-5 turbo from serial 37CTF00003, with the S4D98E-2NFE. Check the serial plate. The bigger SK1026-5 turbo has its own manual.

Quick facts

• Manual Number: WEBM005300
• Models: SK1020-5, SK1020-5 turbo
• Serials: 37CF00004 / 37CTF00003 and up
• Engines: 4D98E-2NFE / S4D98E-2NFE
• Machine Type: Skid-steer loader
• Format: PDF, 250 pages

What's in it

The structure and function chapter explains the hydrostatic transmission, the variable pumps, the drive motors, the PPC valves and the control valve, then how the hydraulic circuits tie them together. The electrical chapter covers the sensors. Testing and adjusting gives the pressures and pump settings to check against, plus troubleshooting for the usual skid steer complaints: loss of drive on one side, slow lift, jerky controls. Disassembly and assembly covers the major components, and the maintenance standards list the wear limits.

Owners who do their own repairs, rental fleets and compact equipment shops get the most use from it. Testing first and comparing your reading with the standard value saves you replacing a pump that didn't need it.

Table of contents

• Structure and function: hydrostatic transmission, variable pumps, drive motors, PPC valves, control valve
• Hydraulic circuits, electrical system and sensors
• Testing and adjusting: pressures, pump settings and troubleshooting
• Disassembly and assembly of major components
• 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

Turbo and non-turbo engines are both covered. Use the engine data that matches the plate on your machine.

PDF, 250 pages, English. Download link straight after checkout. We're an independent seller with no link to Komatsu.