Caterpillar DP50CNM1 Forklift Service and Schematic Manual (99739-8B120)

For a DP50CNM1 with serial AT19D-82011-up, yes, this is the right shop manual set. This Cat is a diesel counterbalanced truck for warehouse floors, loading areas, and yard work. Around my shop, technicians reach for this type of manual when they need to diagnose faults, set adjustments, or tear into the hydraulics, drive unit, mast, wiring, or engine.

What this manual helps you do

• Trace electrical circuits, controls, and wiring faults.
• Diagnose hydraulic, brake, steering, and transmission problems.
• Follow procedures for mast, forks, axles, drive unit, and power-train work.
• Adjust and verify truck systems using the service data provided.
• Rebuild or replace major engine, hydraulic, and traction components.

Who this is for

This suits a warehouse maintenance tech, dealer technician, independent forklift shop, plant mechanic, or rental fleet mechanic handling Cat diesel trucks. It is workshop documentation, not an operator handbook. The operator handbook is the companion volume for daily driving and operating instructions, and is also available.

FAQ

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

A: You receive three related Cat publications in 15 PDF files, split by section, with 657 pages total. The files carry a real text layer, so you can search and copy text, then print or zoom the pages as needed.

Q: Does it fit my truck variant?

A: The publication covers GP40N1, DP40NM1, GP45N1, DP45NM1, GP50CN1, DP50CNM1, GP50N1, DP50NM1, GP55N1, DP55NM1, and TB45. For DP50CNM1, the stated coverage is serial AT19D-82011-up.

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

A: This is the repair reference for in-house and field service work, including schematics, troubleshooting, adjustments, and component repairs. The set also includes matching engine material and related supplements.

For the listed DP50CNM1 range, this gives a working technician the repair and schematic information needed to service the truck properly.

Models covered by this manual

Caterpillar publication 99739-8B120 is the factory service and schematic manual for the DP50CNM1, serial range AT19D-82011-up. The same publication covers 7 further forklift models: DP45NM1, DP50NM1, DP55NM1, GP45N1, GP50CN1, GP50N1, GP55N1. The cover also lists GP40N1, DP40NM1, TB45. Check the model and serial number on your data plate before ordering.

Table of Contents:

• 99739-8B120 – Chassis & Mast Service Manual
  • Foreword
  • Electrical System
  • Electrical Schematics
  • Powershift Transmission
  • Service Data

Caterpillar Software

Caterpillar PDF Manuals