Caterpillar DP45NB Forklift Service and Operator Manual (99739-6B110)

A Cat DP45NB is a diesel counterbalanced forklift for moving pallets around warehouse floors, loading areas, and yards. When one is down during a shift, a warehouse maintenance tech, dealer technician, or independent forklift shop reaches for this manual to test the fault, make adjustments, and return the truck to work. This download contains 8 Cat publications, including service material and companion engine information, rather than one single booklet.

What this manual helps you do

• Trace electrical circuits, switches, sensors, and wiring faults.
• Check hydraulic functions, steering, brakes, and transmission operation.
• Follow removal, inspection, adjustment, and installation procedures.
• Diagnose drive-unit, mast, and engine-related problems.
• Troubleshoot fault symptoms using service data and test procedures.

Who this is for

This suits warehouse maintenance techs, plant maintenance teams, dealer technicians, independent forklift repair shops, and rental fleet mechanics. It is the forklift maintenance trade document, with the operator handbook as the companion volume for daily operation and checks.

FAQ

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

A: You receive 52 PDF files covering 8 separate publications, split by section, with 2,035 pages total. The files have a real text layer for searching and copying, and the pages support normal printing and on-screen zoom.

Q: Does it fit my truck and serial range?

A: Yes, for a DP45NB marked CT19F-50001-79999. The same publication set also covers GP40N, DP40NB, GP45N, GP50CN, DP50CNB, GP50N, DP50NB, GP55N, DP55NB, and TB45.

Q: How does it fit the repair job?

A: It gives a shop technician workshop-level guidance for electrical, hydraulic, power train, brake, steering, mast, and engine work. That makes it suitable for pulling a truck from the aisle, fixing the breakdown, and getting it back before the next wave.

For a DP45NB in that serial range, yes, this is the manual set to keep the truck moving through in-house repairs.

Models covered by this manual

Caterpillar publication 99739-6B110 is the factory service and operator manual for the DP45NB, serial range CT19F-50001-79999. The same publication covers 8 further forklift models: DP50CNB, DP50NB, DP55NB, GP40N, GP45N, GP50CN, GP50N, GP55N. The cover also lists DP40NB, TB45. Check the model and serial number on your data plate before ordering.

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