Caterpillar DP35 Forklift Mast Supplement Service Manual (99719-72102)

Yes, this is the right mast document for GP15, GP18, GP20, GP25, GP30, GP35, DP20, DP25, DP30, or DP35 Cat counterbalanced trucks. The mast handles lifting, lowering, and load positioning on the plant floor or yard. Maintenance technicians use this manual when they need to service mast components during a planned repair window and return the truck to safe operation.

What this manual helps you do

• Trace mast-related faults and unusual lifting behavior.
• Check mast components before removing them for service.
• Follow procedures for mast, fork, chain, roller, and lift-cylinder work.
• Adjust and verify mast operation after repair.
• Rebuild or replace mast assemblies with the correct service sequence.

Who this is for

This suits a plant maintenance technician, dealer technician, independent forklift shop, or rental fleet mechanic working on mast repairs. The trade is forklift mechanical service. The companion chassis service manual is also available for the truck's broader systems.

FAQ

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

A: You receive 3 PDF files with 25 pages total, split by section. That setup lets you open the mast section you need during a repair.

Q: Which trucks and serials does it fit?

A: It covers GP15, GP18, GP20, GP25, GP30, GP35, DP20, DP25, DP30, and DP35 models. The listed serial coverage is 3AM00001-up, 5AM00001-up, 5AM90001-up, 7AM00001-up, 8AM00001-up, and 5BM00001-up.

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

A: Use it for workshop-level mast inspection, adjustment, troubleshooting, removal, and rebuild work. In my experience, having the mast procedure in front of you makes a short weekend repair far easier to control.

If your truck and serial range match and the job is mast-related, yes, this is the manual to use for the repair.

Models covered by this manual

Caterpillar publication 99719-72102 is the factory mast supplement service manual for the DP35. The same publication covers 2 further forklift models: DP20, DP25. The cover also lists GP15, GP18, GP20, GP25, GP30, GP35, DP30. Check the model and serial number on your data plate before ordering.

Table of Contents:

The following is a general outline of the sections covered in a Cat service manual of this type. Actual chapter numbering and section names may vary by model.

• Foreword
• General Information
• Cooling System
• Electrical System
• Controllers
• Power Train
• Powershift Transmission
• Front Axle and Reduction Differential
• Rear Axle
• Brake System
• Steering System
• Hydraulic System
• Mast and Forks
• Troubleshooting
• Service Data

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