Caterpillar DP150 Forklift Service and Schematic Manual (99799-80120)

A Cat DP150 is a diesel counterbalanced truck for moving pallet loads around the warehouse, loading areas, and yard. When one is pulled from the aisle during a second-shift breakdown, the service manual is what a warehouse maintenance tech, dealer technician, or independent forklift shop reaches for. It helps trace faults, carry out adjustments, and return the truck to work before the next wave.

What this manual helps you do

• Trace electrical faults through wiring diagrams and system schematics.
• Diagnose problems in the power train, transmission, axles, brakes, steering, and hydraulics.
• Follow removal, inspection, adjustment, and replacement procedures for truck systems.
• Rebuild hydraulic components, drive-unit assemblies, and related mechanical parts.
• Check service data and troubleshooting guidance during a field or shop repair.

Who this is for

This suits plant maintenance technicians, rental fleet mechanics, dealer technicians, and independent forklift repair shops working on Cat diesel counterbalanced trucks. It is the workshop service reference, while the operator handbook is the companion volume for daily operation and routine checks.

FAQ

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

A: You receive a set of 4 Cat publications delivered as 46 PDF files, split by section, with 1,185 pages total. The files can be printed or zoomed for shop work, and the set has a real text layer for searching and copying text.

Q: Which trucks and serials does it fit?

A: It covers Cat DP100, DP115, DP135, and DP150 trucks, with the DP150 serial coverage shown as 6DP-10011-up. That gives you a clear match point before starting the repair.

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

A: This is for workshop-level troubleshooting, testing, adjustment, teardown, and reassembly, rather than driving instruction. It gives the maintenance team one four-publication set for keeping the truck moving.

Yes, this is the right set for a Cat DP150 in the stated serial range. Use it to diagnose the fault, complete the repair, and get the truck back into service.

Models covered by this manual

Caterpillar publication 99799-80120 is the factory service and schematic manual for the DP150, serial range 6DP-10011-up. The same publication covers 3 further forklift models: DP100, DP115, DP135. Check the model and serial number on your data plate before ordering.

Table of Contents:

• 99799-80120 – Chassis & Mast Service Manual
  • Foreword
  • General Information
  • Cooling System
  • Electrical System
  • Power Train
  • Speed Powershift Transmission
  • Front Axle And Reduction Differential
  • Rear Axle
  • Brake System
  • Steering System
  • Hydraulic System
  • Mast And Forks
  • Hydraulic Fork Positioner
  • Hydraulic Side Shifters
  • Service Data

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