Mitsubishi FD55N1 Forklift Engine Service Manual (99739-59105)

This Mitsubishi FD55N1 is a diesel counterbalance truck, the kind that lives on docks and yard ramps hauling heavier pallets. The manual we're talking about is the ENGINE service manual for that truck, not the full chassis book. People pull this out when the truck is down with an engine issue and they need it back in the aisle before the next wave of trailers. It's for real repair work: measurements, specs, and step-by-step tear-down and reassembly of the engine.

What this manual helps you do

• Diagnose hard-start, no-start, smoke, or low-power complaints on the FD55N1 diesel engine
• Trace and check engine-side electrical and sensor circuits using the wiring and system diagrams
• Follow step-by-step procedures to strip, inspect, and rebuild the engine and bolt-on components
• Adjust fuel system, valve train, and engine-related controls to the correct spec after repairs
• Verify engine-related pressures and settings after work so the truck can go back into service

Who this is for

Good fit if you're a warehouse maintenance tech, dealer tech, independent forklift shop, or rental fleet mechanic looking to do engine diagnostics or overhaul on an FD55N1. If you need mast, steer axle, hydraulics, or general truck info, you want the separate chassis service manual or the operator's handbook instead.

FAQ

Q: What format is it in, and can I search it?

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

Q: Will it cover my truck's serial number?

A: It's written for FD55N1 trucks in the AF28D-80011-up serial range. If your plate matches that family, you're in the right spot.

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

A: No. This is engine only. For mast, axles, steering, or hydraulics, you need the FD55N1 chassis service manual.

Bottom line: If your FD55N1 problem is in the engine, this is the right manual. If it's anywhere else on the truck, it isn't.

Models covered by this manual

Mitsubishi publication 99739-59105 is the factory service manual for the FD55N1, serial range AF28D-80011-up. The same publication covers 4 further forklift models: FD40N1, FD45N1, FD50CN1, FD50N1. 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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