Caterpillar GC20HP Forklift LPG Service Manual (99729-85100)

Yes, if you're servicing the LPG fuel system on a Caterpillar GC20HP. This is the workshop manual for the gas side of the truck, the sort of book a plant mechanic or independent forklift shop pulls out when the truck runs poorly, won't start, or needs fuel-system repair. It pairs with the engine service manual, as Caterpillar published the engine and LPG information separately.

What this manual helps you do

• Trace LPG fuel flow through the tank, lines, converter, regulator, and mixer
• Diagnose fuel delivery and LPG operating faults
• Follow removal, inspection, adjustment, and installation procedures
• Check the mixer, regulator, and converter during repair work
• Verify system operation after service

Who this is for

This suits warehouse maintenance technicians, rental fleet mechanics, dealer technicians, and independent forklift repair shops working on gas-powered Cat trucks. It is a service manual for repair work, with the companion chassis manual available for the truck's frame, hydraulics, mast, steering, and related systems.

FAQ

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

A: You receive 16 PDF files split by section, with 79 pages total. The PDFs have a real text layer, so you can search and copy text, as well as print or zoom the procedures on screen.

Q: Does it fit my truck or engine variant?

A: The cover identifies the 4G63, 4G64, and 6G72 applications, along with AA0001-ZZ9999 and 0A0001-0Z9999 coverage. Match those identifiers to the truck or engine before starting work.

Q: What job is this book meant for?

A: It is for LPG fuel-system service, including the tank, lines, converter, regulator, and mixer. Around my shop, this is the book I'd reach for before chasing a gas-fuel fault on a GC20HP.

For the listed GC20HP LPG application, this gives you the fuel-system procedures needed to diagnose, service, and return the truck to work.

Models covered by this manual

Caterpillar publication 99729-85100 is the factory lpg service manual for the GC20HP. The same publication covers 6 further forklift models: GC15, GC18, GC20, GC25, GC25HP, GC30. The cover also lists 4G63, AA0001-ZZ9999, 4G64, 6G72, 0A0001-0Z9999, 4G63,. Check the model and serial number on your data plate before ordering.

Table of Contents:

• 99729-85100 – LPG Supplement Service Manual
  • Foreword
  • Types of LP-Gas
  • Structure and Function
  • Actions to Be Taken in the Event of a Failure
  • Pre CARB Troubleshooting
  • Pre CARB Disassembly and Reassembly
  • Pre CARB Inspection and Adjustment
  • CARB Tier 1 Emissions Control System
  • Systems Operation
  • System Adjustments
  • S-15G Fuel System Troubleshooting
  • Schematics
  • Inspection and Adjustment

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