Caterpillar M120D Forklift Service and Schematic Manual (SENB8470)

This Cat M120D is a counterbalanced diesel forklift for moving heavy loads across warehouse floors, loading areas, and yards. When a truck is down during second shift, maintenance techs and forklift shops use the service manual to trace faults, set systems correctly, and return it to work. It covers the M70D, M80D, M100D, and M120D models. The download contains seven Cat publications, supplied as a complete set rather than one booklet.

What this manual helps you do

• Trace electrical faults through wiring diagrams and system schematics.
• Check and adjust the power train, brakes, steering, hydraulics, mast, and forks.
• Follow removal, inspection, repair, and installation procedures for truck assemblies.
• Diagnose operating faults using service data and troubleshooting guidance.
• Rebuild or replace major chassis, hydraulic, and engine-related components with the matching manual sections.

Who this is for

This suits warehouse maintenance techs, plant maintenance teams, dealer technicians, independent forklift repair shops, and rental fleet mechanics. It is a workshop manual for the forklift trade, with the engine and chassis publications organized within the same seven-publication set. The operator handbook and parts catalog are separate companion documents and are also available.

FAQ

Q: What do I receive, and how is it organized?

A: You receive seven Cat publications in 28 PDF files, totaling 519 pages, split by section. That gives you the relevant manual section ready for viewing or printing at the bench.

Q: Which truck variants does it fit?

A: The stated coverage is M70D, M80D, M100D, and M120D diesel counterbalanced trucks. If your data plate matches one of these models, the set is aimed at that truck family.

Q: How does it fit the repair work I'm doing?

A: Use it for in-house repairs, second-shift breakdowns, hydraulic work, electrical diagnosis, drive-unit service, and engine-related repairs. It is the reference to pull a truck out of the aisle and get it back before the next wave.

For the listed Cat models, this set gives your shop the service procedures and schematics needed to keep the truck working.

Models covered by this manual

Caterpillar publication SENB8470 is the factory service and schematic manual for the M120D. The same publication covers 7 further forklift models: M100D, M100D 36-48V, M100D 72-80V, M120D 36-48V, M120D 72-80V, M70D, M80D. Check the model and serial number on your data plate before ordering.

Table of Contents:

• SENB8470 – Service Manual
  • Foreword
  • General
  • Electrical and Electronic
  • Differential and Final Drive
  • Drive Motor
  • Brake System
  • Steering System
  • Hydraulic System
  • Troubleshooting
  • Masting
  • Mast and Forks
  • Service Data
• SENB8464-03 – Service Manual
  • Foreword
  • Specifications
  • Systems Operation Glossary
  • Testing And Adjusting Accessing Stored Faults

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