Caterpillar GC20K Forklift LPG Service Manual (99719-80150)

This Cat GC20K is a counterbalanced LPG forklift used to move pallet loads around warehouses, plants, and yards. A maintenance technician reaches for this manual when gas-fuel faults, poor running, or fuel-system repairs need to be handled by the book. It is the LPG fuel-system supplement published to pair with the engine service manual. The aim is practical diagnosis, adjustment, and repair.

What this manual helps you do

• Trace LPG fuel flow from the tank through the lines, converter, regulator, and mixer.
• Check the LPG tank, shutoff components, hoses, fittings, and related fuel-system parts.
• Follow removal, inspection, adjustment, and replacement procedures for the gas equipment.
• Diagnose fuel delivery and engine-running problems using the manual's testing and troubleshooting guidance.
• Verify repairs before returning the truck to service or closing a maintenance record.

Who this is for

This suits warehouse maintenance technicians, plant maintenance staff, dealer technicians, independent forklift shops, and rental fleet mechanics working on LPG trucks. It is written for workshop repair trade work, with the companion chassis manual also available for truck systems such as hydraulics, mast, steering, brakes, and wiring.

FAQ

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

A: You receive four separate Cat publications in 57 PDF files, 656 pages total, split by section. The set has a real text layer, so you can search and copy text, as well as print or zoom the pages for shop work.

Q: Which trucks and serials does it fit?

A: It covers GC15K, GC25K, GC18K, GC25K HP, GC20K, GC30K, GC20K HP, and 4G63/4G64 applications. The GC20K serial coverage is AT82C-00011-up, AT82D-00011-up, and AT82E-00011-up.

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

A: Choose it for LPG fuel-system service, fault tracing, adjustment, and repair on these Cat trucks. It gives the technician a workshop reference for gas-fuel work and related engine-running problems.

With this set, you can diagnose LPG faults, carry out repairs, and document the work with the correct Cat procedures.

Models covered by this manual

Caterpillar publication 99719-80150 is the factory lpg service manual for the GC20K, serial range AT82C-00011-up / AT82D-00011-up / AT82E-00011-up. The same publication covers 4 further forklift models: GC20K HP, GC25K, GC25K HP, GC30K. The cover also lists GC15K, GC18K, 4G63/4G64. Check the model and serial number on your data plate before ordering.

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