Mitsubishi FD40N1 Forklift Engine Service Manual (99739-59105)

This is the engine service manual for a Mitsubishi FD40N1 diesel counterbalance truck. Around my shop, this is what you pull when you're into the engine deeper than filters and belts and you need proper teardown, inspection, and reassembly info. If you're chasing a no-start, low power, smoke, or oil consumption issue on an FD40N1, this is the right kind of book. If you're hoping for mast, hydraulics, steer axle, or brake coverage, this is not it.

What this manual helps you do

• Diagnose hard-start, no-start, low power, or smoking complaints on the FD40N1 engine
• Check and adjust engine-related settings after component replacement or overhaul
• Follow step-by-step engine teardown and rebuild procedures on the bench
• Replace gaskets, seals, pumps, and bolt-on engine accessories with correct sequences
• Troubleshoot engine-related fault codes and verify repairs with the right test specs

Who this is for

This is for plant or warehouse maintenance, dealer techs, independents like me, and rental fleet mechanics who are actually wrenching on the FD40N1 engine. If you need operating instructions, daily checks, or safety info, you want the operator's handbook instead. If you need mast, steering, or hydraulic repair, you want the chassis or truck service manual, not this engine book.

FAQ

Q: What format is it in, and is it readable?

A: You get 5 PDF files, split by section. They have a real text layer, so they're searchable and the diagrams and text are clear on a normal laptop or tablet.

Q: Will this cover my serial number?

A: It's written for FD40N1 trucks from serial AF12C-00011 and up. If your plate shows FD40N1 with a serial in that range, you're covered.

Q: Is this the right document if I'm chasing a mast or hydraulic issue?

A: No. This is engine only. For mast, hydraulics, axles, or brakes, you need the main truck/chassis service manual.

Bottom line: If you're working on the FD40N1 engine itself, buy this. If your problem is anywhere else on the truck, save your money and look for the chassis manual instead.

Models covered by this manual

Mitsubishi publication 99739-59105 is the factory service manual for the FD40N1, serial range AF12C-00011-up. The same publication covers 4 further forklift models: FD45N1, FD50CN1, FD50N1, FD55N1. Check the model and serial number on your data plate before ordering.

Table of Contents:

• 854 Diesel Engine (99739-59101)
  • Specifications
• 854 Diesel Engine (99739-59102)
  • Disassembly and Assembly
• 854 Diesel Engine (99739-59103)
  • Systems Operation Testing and Adjusting
• 854 Diesel Engine (99739-59104)
  • Troubleshooting
• 854 Diesel Engine (99739-59105)
  • Operation and Maintenance Manual

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