Caterpillar DP135NM1S Forklift Service and Operator Manual (99799-41110)

This Cat is a diesel counterbalanced forklift for moving palletized loads around a warehouse, plant, or yard. When a truck is pulled from the aisle during a second-shift breakdown, this is the kind of manual a maintenance tech uses to find the fault and get it working again. I've used manuals like this for hydraulic, drive, brake, steering, electrical, and engine repairs.

What this manual helps you do

• Trace wiring faults, starting problems, and charging-system issues.
• Check hydraulic, brake, steering, and transmission operation.
• Follow procedures for mast, forks, axle, power train, and engine work.
• Diagnose truck symptoms using service data and troubleshooting guidance.
• Adjust or replace components during shop repairs and rebuilds.

Who this is for

This suits warehouse maintenance techs, plant maintenance teams, dealer technicians, independent forklift shops, and rental fleet mechanics. It is workshop-level service material for the counterbalanced diesel forklift trade, with the operator handbook and companion chassis or engine publications also available where required.

FAQ

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

A: You receive 55 PDF files containing 1,373 pages, split by section across five Cat publications. The PDFs have a real text layer, so you can search and copy text, print pages, and zoom in on drawings and procedures.

Q: Does it fit my truck and serial range?

A: Yes, when the truck is within serial range T15E-20011-39999. The cover lists DP100NM1, DP100NM1S, DP120NM1, DP120NM1S, DP135NM1, DP135NM1S, DP150NM1, DP150NM1S, 6D16-TL, and the DP100/DP150 NM1(S) variants.

Q: How does it fit the job I am doing?

A: It is for workshop diagnosis, adjustment, teardown, and repair rather than routine driving instruction or parts identification. The five-publication set gives you the truck service material together with the related engine information.

If your Cat is one of these models and falls in that serial range, this set gives your shop the reference needed to repair it and return it to work.

Models covered by this manual

Caterpillar publication 99799-41110 is the factory service and operator manual for the DP135NM1S, serial range T15E-20011-39999. The same publication covers 5 further forklift models: DP100NM1, DP100NM1S, DP135NM1, DP150NM1, DP150NM1S. The cover also lists DP120NM1, DP120NM1S, 6D16-TL. Check the model and serial number on your data plate before ordering.

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