Mitsubishi FD135NM1S Forklift Service Manual (99799-21110)

This manual is for a big Mitsubishi FD135NM1S diesel counterbalance truck, the kind that lives on docks, yards, and heavy shipping lanes. It's what you pull up when that truck is blocking a door, throwing a fault, or you've got an oil-soaked final drive and need it back in the game before the next wave of trailers. Around my shop, this is the book we use when guesswork is no longer an option and we need factory procedures, specs, and wiring in front of us.

What this manual helps you do

• Diagnose hydraulic issues, check pressures, and trace lift/tilt or attachment problems back to valves, hoses, or pump.
• Follow step-by-step teardown and rebuild procedures on the diesel engine, power train, and powershift transmission.
• Trace electrical faults using wiring diagrams, then verify sensor, switch, and harness problems with a meter.
• Adjust brakes, steering, and axles after parts replacement so the truck tracks straight and stops like it should.
• Troubleshoot mast, carriage, and fork issues, then set clearances and verify operation after repairs.

Who this is for

This is aimed at warehouse or plant maintenance techs, dealer techs, independent forklift shops, and rental fleet mechanics looking after FD135NM1S units in the F15E-90011-99999 serial band. If you want basic operating instructions or safety checks, you need the operator's handbook instead.

FAQ

Q: What's the file format and are the diagrams readable?

A: You get 27 PDF files, split by section. They have a real text layer, are searchable, and the wiring diagrams are clear enough to follow on screen or print.

Q: How do I know it fits my truck?

A: It's written for the Mitsubishi FD135NM1S with serial numbers in the F15E-90011-99999 range. If your plate is outside that, this may not match perfectly.

Q: Is this the right document if I'm doing my own repairs?

A: Yes, this is the workshop-level service manual, not a parts book or operator's manual, and it's what you want for real repair work.

Bottom line: If you're maintaining or rebuilding an FD135NM1S in that serial range, this is the right manual. If your truck is a different model or class, it's the wrong one.

Models covered by this manual

Mitsubishi publication 99799-21110 is the factory service manual for the FD135NM1S, serial range F15E-90011-99999. The same publication covers 3 further forklift models: FD100NM1S, FD120NM1S, FD150ANM1S. Check the model and serial number on your data plate before ordering.

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