Caterpillar GC45K STR Forklift Engine Service and Schematic Manual (99739-82110)

This Cat GC-series truck is a cushion-tire counterbalanced forklift for moving pallet loads around a warehouse, plant, or yard. In my experience, rental fleet mechanics and plant technicians reach for this manual when a truck is due out tomorrow and the engine needs testing, adjustment, or repair. It gives the shop procedures behind scheduled maintenance, fault tracing, and engine teardown work.

What this manual helps you do

• Check engine specifications, system operation, and service data during scheduled maintenance.
• Trace engine, fuel, cooling, lubrication, and electrical faults with testing procedures and schematics.
• Adjust operating settings using the stated torque values, clearances, and test methods.
• Follow disassembly and assembly procedures for engine components and related systems.
• Verify repairs before returning the truck to service.

Who this is for

This suits a warehouse maintenance tech, dealer technician, independent forklift repair shop, or rental fleet mechanic working on Cat GC-series trucks. This is the engine book of the set. Chassis, mast, hydraulic, steering, brake, and power-train work is covered in the companion chassis manual, also available.

FAQ

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

A: You receive 7 Cat publications in 93 PDF files, split by section, with 2,486 pages total. The PDFs carry a real text layer, so you can search and copy text, then print or zoom sections at the bench.

Q: Does it fit my truck and serial range?

A: Yes, when your truck matches GC35K, GC40K, GC45K SWB, GC45K, GC55K, GC60K, or GC70K, with the listed AT87B, AT88B, or AT89B serial prefixes from 00001-up. That gives you the correct model family coverage.

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

A: It is a workshop-level repair set for engine testing, adjustment, torque and clearance checks, and rebuild work, rather than an operator handbook. It gives your shop the engine service information needed to turn the truck around properly.

Yes, this is the right Cat workshop set for the listed GC models and serial coverage. You can use it to diagnose, repair, and verify the engine before the next hour-meter interval or customer dispatch.

Models covered by this manual

Caterpillar publication 99739-82110 is the factory engine service and schematic manual for the GC45K STR. The same publication covers 8 further forklift models: GC35K, GC40K, GC40K STR, GC45K SWB, GC55K STR, GC60K, GC70K, GC70K STR. The cover also lists GC45K, GC55K. Check the model and serial number on your data plate before ordering.

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