Caterpillar DP25 Forklift Mast Supplement Service Manual (99719-72102)

This is the mast supplement for Cat counterbalanced forklifts working on plant floors, loading areas, and yards. It suits GP15, GP18, GP20, GP25, GP30, GP35, DP20, DP25, DP30, and DP35 trucks. In my experience, a maintenance tech reaches for this book when mast work has to be done safely and correctly during a short repair window.

What this manual helps you do

• Trace mast hydraulic and mechanical faults.
• Follow mast removal, inspection, adjustment, and reassembly procedures.
• Check lift chains, rollers, bearings, forks, and related mast parts.
• Troubleshoot uneven lifting, binding, drift, and abnormal mast movement.
• Verify service settings before returning the truck to work.

Who this is for

This suits a warehouse maintenance tech, plant maintenance lead, dealer technician, independent forklift shop, or rental fleet mechanic working in the forklift repair trade. The operator handbook and companion chassis service manual are also available for the rest of the truck.

FAQ

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

A: You receive 3 files with 25 pages total, split by section. That keeps the mast procedures grouped for workshop use and reference at the truck.

Q: Which serial numbers does it fit?

A: It covers 3AM00001-up, 5AM00001-up, 5AM90001-up, 7AM00001-up, 8AM00001-up, and 5BM00001-up. It is the right mast reference for the listed GP and DP models when the serial prefix matches.

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

A: This is the factory mast document for inspection, adjustment, troubleshooting, and repair work. It gives you the mast-specific reference needed when the truck is in the shop and the repair has to be done right.

If your truck is one of the listed models and you're working on its mast, this is the manual to use for the job.

Models covered by this manual

Caterpillar publication 99719-72102 is the factory mast supplement service manual for the DP25. The same publication covers 2 further forklift models: DP20, DP35. 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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