Caterpillar GP20NM Forklift Engine Service Manual (99789-87100)

A Cat GP20NM keeps pallets moving across the warehouse floor, loading bays, and yard. When a second-shift breakdown stops one, a maintenance tech or forklift shop reaches for the engine service manual to test the fault, set adjustments, and get the truck running again. This is the engine book of the set, with the companion chassis manual covering chassis and mast work.

What this manual helps you do

• Check engine specifications, system operation, service data, torque values, and clearances.
• Test and adjust engine systems using workshop procedures.
• Diagnose running, starting, charging, fuel, and cooling system faults.
• Follow disassembly and assembly procedures for engine components.
• Rebuild engine assemblies and verify the work before returning the truck to service.

Who this is for

This suits warehouse maintenance techs, dealer technicians, independent forklift repair shops, and rental fleet mechanics working on Cat counterbalanced trucks. It is a workshop service manual for the engine trade, with the companion chassis manual also available for the rest of the truck.

FAQ

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

A: You receive nine PDF files split by section, with 230 pages total. The files have a real text layer, so you can search and copy text, then print or view procedures at a useful working size.

Q: Does it fit my GP20NM?

A: Yes. The publication cover identifies the GP15N-GP35N range, which includes the GP20NM, along with K15, K21, K25, and GPE15N-GPE35N models.

Q: How does this fit the repair job?

A: Use it for engine testing, adjustment, teardown, reassembly, specifications, torque information, and clearances. It gives the shop the engine procedures needed to diagnose faults and complete repairs.

For a GP20NM engine job, this gives you the workshop procedures to test, repair, rebuild, and return the truck to service before the next warehouse wave.

Models covered by this manual

Caterpillar publication 99789-87100 is the factory engine service manual for the GP20NM. The same publication covers 17 further forklift models: GP15ND, GP15NM, GP15NT, GP18ND, GP18NM, GP18NT, GP20CND, GP20CNT, GP20ND, GP20NT, GP25ND, GP25NT and 5 more. The cover also lists K15,, K21,, K25, K15, K21, GP15N-GP35N,, GPE15N-GPE35N. Check the model and serial number on your data plate before ordering.

Table of Contents:

• 99789-87100
  • How To Use This Manual
  • Engine Maintenance
  • Specifications
  • Precautions
  • Lubrication System
  • Engine Outside Drawings
  • Adjustment Value

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