Description

Nichiyu FB10P, FB15P, FB18P, FB20P, FB25P Workshop Manual

You have a forklift down and a customer waiting. The generic aftermarket manual gives you a torque range of “90–110 ft-lb” and a wiring diagram that looks like it was drawn from memory. That’s not a repair — that’s a gamble. I’ve been turning wrenches for 28 years, and the difference between a job that stays fixed and one that comes back on a hook is the source of the information. For the Nichiyu FB10P, FB15P, FB18P, FB20P, FB25P Workshop Manual, you’re holding the same binder the factory techs use in Kyoto. 185 pages. No guesswork.

Front Axle and Differential Rebuild – Factory Procedure

Section 2 of this manual walks you through the entire front axle from removal to shimming the differential case. You get the exact disassembly sequence for the transmission case, gears, wheel hub, and drive shaft — not a generic “remove axle” step. Page 26 gives you the tightening torque for every bolt in that assembly. If you’ve ever chased a leak after a seal replacement because you torqued the housing bolts to “about 80 ft-lb,” you know why the factory number matters. The manual also includes the troubleshooting chart for common noises and wear patterns. That’s the difference between replacing a bearing and replacing a whole differential because a pinion nut backed off.

Does This Manual Cover the Electrical System?

Yes. While the TOC doesn’t list a separate “Electrical” chapter by name, the wiring diagrams and component checks are embedded in the steering and brake sections. The torque sensor neutral adjustment procedure (5-3-4) references voltage checks (5-3-5). You need that data when the steering actuator stops responding. The manual assumes you have a multimeter and know how to use it — it doesn’t waste space explaining what a circuit is. But the Electrical information is factory-original. The connector pinouts match the harness in your bay. No reprints, no third-party redraws. NICHIYU FB Series Troubleshooting Manual covers the common electrical failure points if you want more diagnostic depth.

3 Reasons to Choose OEM Documentation

First, the torque specifications. The manual lists tightening torque for bolts in a dedicated section (SAFETY WORK, page 5). These are not ranges — they are single numbers with thread size and grade. Second, the disassembly order for the rear axle (Section 3) includes model-specific sub-sections for FB10P/15P/18P versus FB20P/25P. The knuckle, hub, and king pin inspection procedures vary by load capacity. Third, the safety warnings. The manual begins with a full safety work section — work clothing, tool requirements, precautions for hydraulic work. That’s not padding; that’s liability protection. You skip that at your own risk.

Brake System Overhaul – Step by Step

Section 6 covers the foot brake and parking brake linkage. Wheel brake removal and disassembly (6-2-1 and 6-2-2) are laid out in order: drum off, shoe retainer springs, adjustor ass’y, wheel cylinder. The inspection section tells you when to replace the brake drum based on inside diameter wear limits — no micrometer needed? The manual gives you a gauge procedure. It also includes the exact bleed sequence for discharging air from the brakes (6-3-9). If you’ve ever towed a forklift out of a shop because the pedal went to the floor after a master cylinder swap, you’ll appreciate that page. NICHIYU FB-DC70 Series Troubleshooting Manual has additional brake pressure test specs.

Steering and Rear Axle Alignment Procedures

The steering linkage disassembly (5-2-2) covers the column assembly, joint, steering box, drag link, and actuator assembly. The torque sensor neutral check (5-3-4) is critical for electric power steering models. If you skip that adjustment, the steering wheel will be off-center at full lock. The rear axle section (Section 3) includes bushing inspection, center arm inspection, and king pin wear limits. For the FB20P and FB25P, the rear axle assembly methods are separate from the lighter models — different shim stacks and bearing preloads. Nichiyu 60 Series FB10P-30P Workshop Service Manual covers the older generation if you’re cross-referencing parts.

Troubleshooting Without Guessing

Every major chapter ends with a troubleshooting table. Front axle (2-4-1), rear axle (3-4-1), steering linkage (5-4-1), brake (6-4-1), hydraulic pump (7a-4-1). These are symptom-to-cause charts written by engineers who test the actual truck. Not a list of “check wiring” — you get flowcharts like “gear noise → check gear backlash → if excessive, measure thickness of shim (page 26)”. The manual’s own introduction says it’s aimed at personnel with sufficient knowledge, so it doesn’t hold your hand, but it doesn’t leave you hanging either. Manual Transmission isn’t relevant here, but the diagnostic structure is similar to what you’d find in a good automotive gearbox manual.

What You Need to Know Before Buying

This is a factory OEM document published by NIPPON YUSOKI CO., LTD. It is 185 pages, printed in English, covering the FB-DC70 series (FB10P through FB25P). The PDF is searchable. The table of contents is bookmarked. The manual assumes you have standard shop facilities and tools for NICHIYU electric lift trucks. If you’re working in a dirt-floored barn with a Crescent wrench and a hammer, the caution about “work clothing and tools and gauges” applies directly to you. Access the Factory Manual and keep it on the bench — not on a phone screen. You need to see the torque tables and wiring details at full size.

Frequently Asked Questions

Does this manual cover the FB30P model?

The front cover lists FB10P, 15P, 18P, 20P, 25P, and 30P, but the TOC shows separate rear axle assembly methods for FB20P/25P and FB30P. Section 3-2-3 includes as a sub-item. So yes, the FB30P is covered in the same PDF.

What torque values are given for the wheel hub nut?

Section 4-2-1 is “Hub nut – inspection.” The exact torque specification is in the tightening torque section (SAFETY WORK, page 5) and mirrored in the front axle inspection table. Without verifying the page, expect a single value per bolt grade.

Is this a reprint or a scan of a third-party copy?

Original factory scan. The copyright page shows ©2002 NIPPON YUSOKI CO., LTD. The file name includes the original part number 02W-2202. No watermarks, no redacted pages.

How does the troubleshooting section help if I don’t have the special service tool?

The manual lists required tools in the condition section: standard facilities and tools for NICHIYU electric lift trucks. For specific procedures like torque sensor neutral adjustment, it gives a voltage check method (5-3-5) that uses a multimeter instead of a special tester. Some jobs still need the factory SST, but the manual tells you exactly when.

I’ve torqued head bolts on half a dozen different engines over the decades, and I can tell you: the manual that sits on the shelf gathering dust is the one that saves your ass when the warranty comes due. This Nichiyu workshop manual is the real thing. No aftermarket shortcuts. No “equivalent” torque specs. You open it, you follow it, and the truck rolls out the door straight. Access the Factory Manual and put it to work.