Description

Nichiyu FBT13P, FBT15P, FBT18P, FBT20PN Service Manual

You’ve got a Nichiyu electric lift truck on the lift, and the customer’s waiting. The problem: some aftermarket PDF you obtained says the traction motor comes off with a 12mm socket, but the bolt head’s 14mm and the housing is cracked from someone using an impact gun where it wasn’t supposed to go. I’ve seen that mistake cost a shop two days and a grand in parts. The fix is having the actual factory specs in your hand. This Nichiyu FBT13P, FBT15P, FBT18P, FBT20PN Service Manual is the real deal – 144 pages from Nippon Yusoki Co., Ltd., written for techs who know their way around a forklift but need the exact torque values and disassembly order to keep things from turning into scrap.

Torque Specs – The Difference Between a Leak and a Job Done Right

Every bolt on these trucks has a specific tightening torque, and the manual dedicates a whole section to it – “Tightening torque of bolts” on the safety work pages. You won’t find a generic “tighten until snug” here. They give you numbers for bolts on the front axle, the hydraulic pump, the mast assembly. That matters because fork oil at 2,000 psi doesn’t care about your feelings. Under-torque a control valve bolt and you’ll be mopping hydraulic fluid off the floor. Over-torque and you strip the threads in the aluminum housing. The factory manual lists those values in ft-lbs. Use them.

Does This Manual Cover the Electrical System?

Yeah, it covers the whole thing – and I mean the whole thing. Chapter 11 is “Electric parts” and it goes through the control unit, forward/backward contactor, accelerator linkage, indicator panel, battery inspection, charger panel, even the fuse replacement procedure. The section on the control unit (11.2) shows you how to disassemble and reassemble the hydraulic contactor (M7). If you’ve ever had a contactor weld shut because someone used a generic wiring diagram and got the polarity wrong, you know why the OEM electrical routing matters. The manual also includes a troubleshooting chapter (13) that walks through the FBT-65 system – auto power function checks, battery electrolyte level warning diagnostics. NICHIYU FBT13P FBT15P FBT18P FBT20PN Troubleshooting Manual is a separate doc, but this service manual gives you the baseline electrical knowledge you need to get the truck back in the aisle.

13 Troubleshooting Chapters – Not Just a Parts Catalog

A lot of so-called service manuals are just parts lists with pretty pictures. This one is different. Chapter 13, “Troubleshooting,” is an actual diagnostic procedure. It starts with an outline of the FBT-65 control system – what changed from the FBT-60, how to check the auto power function, how to read the warning display for battery electrolyte level. That’s the stuff that keeps a technician from swapping boards when the problem is a low battery or a stuck microswitch. Pair this with the Nichiyu 70 Series FBT Service Manual – Section: Oil Pump (Gear Pump Type) if you’re working on hydraulic pumps, but for electrical gremlins, this is your go-to.

Front Axle: Disassembly and Assembly Procedures

Front axle work on these trucks means pulling the drive motor and the reduction gear. Chapter 2 takes you through the front axle ass’y and the front axle comp – disassembly, assembly, and adjustment. The adjustment section is critical: bearing preload, backlash, all that jazz. Without the factory specs, you’ll either have a wobbly wheel or a seized bearing. The manual spells out the sequence so you don’t put the shims in backwards. And if you’re thinking about using a Manual Transmission guide for the gear setup, don’t. The forklift’s drive axle has specific clearances that a car manual won’t give you.

Safety Work – Why the First 7 Pages Matter

I’ve seen too many guys skip the safety section because they think they know it all. Then they drop a mast on themselves or short out a battery terminal and weld a wrench to the frame. The manual starts with a full page of “Precautions related to safe inspection and maintenance work” – work clothing, tools, gauges, safety work, repair of electrical components, hydraulics, tightening torque. It even tells you what kind of shop you need. Read it. Then read the location of safety labels and the cautions for maintenance. Your life insurance doesn’t cover stupidity. The OEM gave you these warnings for a reason.

Source Validity – Factory Print vs. Aftermarket Crap

I don’t trust aftermarket documentation. Period. I’ve seen a third-party manual tell a tech to use 100 ft-lbs on a bolt that should be 45 because they copied the wrong table. This Nichiyu manual is a direct scan of the original factory publication – no reprints, no edits, no mistakes introduced by someone who doesn’t know a torque wrench from a torque stick. The page headers say “NICHIYU NIPPON YUSOKI CO., LTD.” and “ELECTRIC LIFT TRUCKS SERVICE MANUAL 65 SERIES.” That’s the real thing. If you want to do a job that doesn’t come back, you start with the original. Nichiyu FB10-30P 1995 Service Manual – OEM Specs for Forklift Repair is another one I keep on the shelf for older models, but for these 65-series trucks, get this one.

Can I use this manual for the FBT20PN model?

Yes. The manual covers FBT13P, FBT15P, FBT18P, and FBT20PN. All four are 65-series electric lift trucks. The difference is load capacity and some component sizing, but the service procedures and torque specs apply to all.

Does it include wiring diagrams?

The electric parts chapter (11) covers component location, disassembly, and assembly, but the troubleshooting chapter (13) includes wiring references. If you need full schematic diagrams, check the separate electrical manual.

What torque values are listed?

Section 5 of the safety work chapter covers “Tightening torque of bolts.” Additional torque specs appear in the front axle, rear axle, and hydraulic system chapters. The manual uses ft-lbs for all critical fasteners.

How do I adjust the microswitch on the steering axle?

Chapter 3.2.1 “Micro switch adjustment” gives the procedure. You’ll need a feeler gauge and the correct clearance specs. The manual tells you exactly where to set the switch gap and how to lock it down so it doesn’t drift.

You can chase down a PDF from some forum and hope the numbers are right. Or you can get the factory document that the guys in Kyoto wrote for the techs who built these trucks. It’s 144 pages of specs, procedures, and warnings that keep your bay safe and your repairs permanent. Access the Factory Manual now and put it on the tablet next to your torque wrench.