Caterpillar GP20CNT Forklift Engine Service Manual (99789-87100)

A Cat GP20CNT is a gasoline or LPG counterbalanced forklift used to move pallets and materials around a warehouse, plant, or yard. This is the engine book of the service-manual set, aimed at the technician repairing the powerplant rather than operating the truck. Around my shop, this is the book I'd reach for when the job involves testing, adjustment, teardown, or rebuilding on the K15, K21, or K25 engine family.

What this manual helps you do

• Check engine specifications, system operation, torque values, and clearances.
• Trace engine faults through testing and adjusting procedures.
• Follow disassembly and assembly steps for engine components.
• Diagnose fuel, cooling, lubrication, starting, and charging systems.
• Verify repairs before returning the forklift to service.

Who this is for

This suits a warehouse maintenance technician, dealer technician, independent forklift shop, plant mechanic, or rental fleet mechanic. The listed coverage includes GP15N-GP35N and GPE15N-GPE35N trucks using the K15, K21, or K25 engine range. Chassis, mast, hydraulics, steering, and other truck systems are handled in the companion chassis manual, also available.

FAQ

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

A: You receive 9 PDF files split by section, with 230 pages total. The files have a real text layer, so you can search the manual and copy text, as well as print or enlarge the relevant section.

Q: Does it fit my GP20CNT?

A: Yes, the GP20CNT falls within the stated GP15N-GP35N model range. Match the engine identification on your truck to the listed K15, K21, or K25 family.

Q: How does it fit the repair job?

A: Use it for workshop-level engine diagnosis, adjustment, torque reference, and rebuild work. It gives your technician the engine procedures needed to put a used or out-of-warranty truck back to work.

For a GP20CNT engine repair job, yes, this is the manual you want. It gives you the service data and procedures to work from the engine bench to final testing.

Models covered by this manual

Caterpillar publication 99789-87100 is the factory engine service manual for the GP20CNT. The same publication covers 17 further forklift models: GP15ND, GP15NM, GP15NT, GP18ND, GP18NM, GP18NT, GP20CND, GP20ND, GP20NM, 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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