Description

Mitsubishi Fuso FK, FM 2007 Technical Manual – Body Builder Edition

If you’re mounting a body on a Mitsubishi Fuso FK or FM chassis and you’re working from aftermarket sketches, you’re asking for a headache. Drilled a side rail in the wrong spot? That frame is toast. Welded on a high-tensile section without checking the manual? Hope you like replacing crossmembers. This Mitsubishi Fuso FK, FM 2007 Technical Manual is the factory-issued document for body builders – 200 pages of clearance diagrams, frame-modification limits, and compliance sheets. I’ve seen guys spend a full day on a rollback install only to find the exhaust melts the mud flap because they guessed the gap. This book stops that.

What the Factory Manual Covers That Aftermarket Copies Don’t

This isn’t a generic wiring schematic. Page 3 lays out the FMVSS compliance requirements for incomplete vehicles – something every body builder needs to understand before altering the chassis. The manual walks through clearance zones around the transmission, propeller shafts, brake hoses, and exhaust system. Want to know the minimum gap between the cab back face and a dump body? It’s in section 1.11. Need to check if you can drill a crossmember without compromising the frame section modulus? Section 3.3 gives the rules. The factory doesn’t leave margins for guesswork.

Clearance Around the Transmission – It’s Not Just for Fitment

Section 1.1 covers clearance around the transmission – and that means more than whether the body bolts hit the bellhousing. If you block the transmission airflow, you cook the seals. The manual specifies minimum distances for clutch-transmission assembly (1.2) and above the transmission (1.3). These aren’t suggestions; they’re dimensions that keep the driveline alive. Miss them by 10 mm and you’ll be pulling a Manual Transmission rebuild earlier than planned.

Frame Modification: Drilling, Welding, and Overhang Limits

Part I, section 3 is the chapter people ignore until they crack a frame. Drilling side rails (3.2) has strict hole-size and location limits. Welding to high-tensile steel frames (3.5) requires a specific process – you can’t just lay a bead. The manual also covers rear overhang extension (3.6) and shortening or extending the frame within the wheelbase (3.7). If you’re hanging a knuckleboom crane on the back, you need those numbers. I’ve seen shops try to mount equipment on the web of the side rail without reading 3.8 – big mistake.

Fuel System and Brake Piping: Not Optional Reading

Section 10 covers the fuel system – general information about routing and protection. Section 8 gives brake tube dimensions and processing instructions for nylon air lines. Cutting a nylon brake line too short or routing it near a moving suspension component can cause an air leak at highway speed. The manual shows exactly how to pipe additional tubing to rear body components (8.3). These are the procedures that keep you on the road, not on a tow truck.

Why Factory OEM Documentation Beats Aftermarket Reprints

Aftermarket manuals reprint old data and leave out updates. This is the original 2007 Mitsubishi Fuso document (LIT. No. HMT07M006-A). Every dimension, every FMVSS reference, every torque spec for body mounting hardware comes straight from the manufacturer. When you’re dealing with FMVSS 105 (hydraulic brake systems) or CMVSS compliance, you need the exact wording from the factory, not a paraphrased version. I’ve seen body builders get fined because their installer used a third-party manual that omitted the final-stage certification note on page 2. Don’t be that guy.

7 Systems You Can Reference in This Manual

1. Clearance zones around driveline and exhaust
2. Frame drilling and welding limits
3. Rear body mounting (U-bolts, brackets)
4. Electrical wiring for body equipment
5. Brake air tubing specifications
6. Fuel system routing
7. Painting restrictions on rubber and plastic parts

Every system has factory diagrams and dimension tables. The cab/chassis drawings in Part II cover 24 different models from FK61FJ-H to FM65FP-H. If you’re working on a 2007 FK or FM, your specific variant is in there.

Who Needs This Manual

Body builders, upfitters, and technicians installing dump bodies, flatbeds, cranes, or utility boxes on 2007 Mitsubishi Fuso FK/FM chassis. If you’re a home-garage enthusiast who bought a surplus cab-and-chassis and wants to weld a service bed, this manual saves you from drilling into a frame rail that can’t support the load. Shops that modify multiple trucks will use the frame section modulus diagrams (section 6) to calculate safe payload distribution before bending metal. One misdrilled crossmember costs more than this book.

FAQ

Does this manual include repair procedures for the engine or transmission?

No. This is a body builder technical manual, not a service repair manual. For transmission overhaul or engine rebuild specs, see the Mitsubishi Fuso FK FM Service Manual instead.

What torque values are listed?

Not many. The manual focuses on clearance dimensions, frame modification limits, and FMVSS compliance. Torque specifications for body mounting bolts are referenced in sections 4.2 and 3.9, but the primary data is dimensional. For driveline torque specs, grab the FUSO FK/FM 2008 Owner’s Manual.

Can I use this manual for a 1991 FK?

No. The frame dimensions, FMVSS requirements, and chassis layout changed between 1991 and 2007. You need the Mitsubishi Fuso FK FM 1991 Service Manual – Section: Cab for that vintage.

Does it cover air brake systems?

Section 8 includes brake air line nylon tubing, piping dimensions, and tubing forming specifications. The manual covers chassis tubing form and dimension specs (8.1) and processing additional tubing (8.2). If you’re running air lines to a rear axle or auxiliary body, the data is in there. The Manual Transmission section covers driveline clearances, not repair.

You can’t afford to guess on body mounting. The factory specifications in this manual are the same data Mitsubishi Fuso sends to authorized upfitters. Access the Factory Manual before you drill that first hole.