Caterpillar GP55NF Forklift LPG Service Manual (99739-31100)

This Cat counterbalanced truck moves pallet loads around warehouses, yards, and plant floors on LPG power. When the fuel system causes hard starting, poor running, or a truck-down surprise, this is the workshop manual a rental fleet mechanic or plant technician reaches for. It is the LPG supplement published to pair with the engine service manual.

What this manual helps you do

• Trace LPG fuel flow through the tank, shutoff valve, lines, and fuel connections.
• Check the converter and regulator during fuel-system service.
• Adjust the mixer and related LPG controls for correct engine operation.
• Diagnose fuel delivery and running faults before pulling major components apart.
• Replace or rebuild LPG fuel-system parts using workshop procedures and service data.

Who this is for

This suits warehouse maintenance technicians, dealer technicians, independent forklift shops, and rental fleet mechanics handling Caterpillar LPG trucks. It fits the engine and gas-fuel trade; the companion chassis manual, also available, handles the truck systems around the engine, including hydraulics, transmission, axles, brakes, steering, mast, and wiring.

FAQ

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

A: You receive 9 PDF files split by section, with 213 pages total. The files can be printed and zoomed, and the real text layer lets you search and copy text.

Q: Which trucks does this manual fit?

A: The cover identifies TB45 and GP40N/NF through GP55N/NF models, including the GP55NF. That gives you a direct match for the listed Caterpillar LPG truck family.

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

A: Use it for LPG fuel-system inspection, adjustment, fault tracing, and component repair at the engine end of the truck. It gives the shop a focused reference when a gas-powered forklift needs to return to work.

For LPG fuel-system work on these Caterpillar models, this is the manual to have open at the bench or beside the truck.

Models covered by this manual

Caterpillar publication 99739-31100 is the factory lpg service manual for the GP55NF. The same publication covers 4 further forklift models: GP40NF, GP45NF, GP50CNF, GP50NF. The cover also lists TB45, GP40N/NF-GP55N/NF. Check the model and serial number on your data plate before ordering.

Table of Contents:

• 99739-31100
  • Quality
  • Valve Clearance
  • Intake Manifold
  • Oil Pump
  • Engine Coolant
  • Precautions
  • Fuel System
  • Starting System

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