Mitsubishi FG20CNM Forklift Engine Service Manual (99789-77100)

On a real floor this FG20CNM is a small LPG counterbalance truck hauling pallets all day, in and out of trailers and racks. The people who grab this manual are the ones doing engine work when the truck is down and the clock is ticking. They need specs, step-by-step teardown, and correct reassembly so the engine starts clean, runs to temp, and passes any emissions or safety checks. This is the engine service manual only, not the chassis manual, so it won't help you with mast, axles, or hydraulics.

What this manual helps you do

• Diagnose hard-start, no-start, misfire, and low-power complaints on the LPG engine
• Follow step-by-step teardown and rebuild procedures for the engine and related components
• Check and set engine adjustments like timing, clearances, and fuel-system settings
• Troubleshoot engine-related fault codes and verify sensor and actuator operation
• Replace gaskets, seals, and major engine parts with the correct sequences and specs

Who this is for

This is for a warehouse maintenance tech, dealer technician, independent forklift shop, or rental fleet mechanic who is doing engine repairs on an FG20CNM. If you need mast, steering, brake, or hydraulic information, or basic operating instructions, this is the wrong book and you want the chassis service manual or the operator's handbook instead.

FAQ

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

A: You get 9 PDF files with a real text layer, so they're searchable and you can copy text. Diagrams are clear, and the set is split by engine-related sections.

Q: Will this cover my specific FG20CNM serial number or variant?

A: It's written for the FG20CNM engine family in general. For edge-case serials or special options, I'd match the book number 99789-77100 against your dealer's system.

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

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

Bottom line: If your job is engine diagnostics or rebuilds on an FG20CNM, this is the right manual. If you need anything off the engine, you'll want a different book.

Models covered by this manual

Mitsubishi publication 99789-77100 is the factory service manual for the FG20CNM. The same publication covers 6 further forklift models: FG15NM, FG18NM, FG20NM, FG25NM, FG30NM, FG35NM. Check the model and serial number on your data plate before ordering.

Table of Contents:

• Foreword
• General Information
• Maintenance
• Tune Up
• Mechanical
• Control
• Lubrication and Cooling
• Fuel
• Electrical

Mitsubishi Software

Mitsubishi PDF Manuals