Mitsubishi RB20NH Reach Truck Service Manual (WHSM0014)

A Mitsubishi RB20NH reach truck is a warehouse narrow-aisle machine, not a yard truck. Think tight racking, high lifts, lots of hydraulic and electrical work, and Zapi controller headaches. People grab this service manual when the truck is out of warranty and they need real repair info, not safety posters: wiring, mast staging, reach carriage issues, alarm codes, and parameter tweaks. If you're trying to keep an RB20NH alive without calling the dealer every time, this is the kind of book you want on the laptop in the shop.

What this manual helps you do

• Diagnose alarm codes, trace faults through the Zapi control system, and confirm what each code actually means
• Check and adjust mast staging, reach carriage, and pantograph so it runs straight and quiet in the aisle
• Follow step-by-step teardown and reassembly on traction and hoist motors, brakes, and drive units
• Troubleshoot hydraulic problems, pressure-test circuits, and set valves to spec after component work
• Verify wiring on the truck, chase shorts or open circuits, and set parameters with TruckTool after repairs

Who this is for

This is aimed at warehouse maintenance techs, independent shops, dealer techs, and rental fleet mechanics working on Mitsubishi RB20NH reach trucks. If you only need basic operating instructions or daily checks, you want the operator's handbook, not this service manual.

FAQ

Q: What format is it in, and can I search it and read the wiring diagrams?

A: You get 11 PDF files split by section. Most are searchable, some scanned pages are not, but the wiring diagrams are readable on a normal screen.

Q: Will it match my serial number or variant?

A: It's written for the RB20NH reach truck family. If your data plate says RB20NH, this is the right manual, regardless of small option differences.

Q: Is this the right thing if I'm just doing basic service?

A: It's more than you need for simple checks, but it's the right document if you're doing real repairs, chasing codes, or rebuilding major components.

Bottom line: If the truck on your floor is a Mitsubishi RB20NH reach truck and you're doing your own repairs, this is the right manual to buy. If it's any other model, skip it.

Models covered by this manual

Mitsubishi publication WHSM0014 is the factory service manual for the RB20NH. The same publication covers 10 further reach truck models: RB14N, RB14NH, RB16N, RB16NC, RB16NH, RB16NHC, RB16NHS, RB16NS, RB25NH, RBM20K. Check the model and serial number on your data plate before ordering.

Table of Contents:

• Contents
  • RB14N-RB25NH Errors
  • RB14N-RB25NH warnings
  • TH77 0206
• 920000
  • Cold store modification
• 110212
  • P
• Chassis (WHSM0014)
  • Introduction
  • Operating the truck
  • Regular maintenance
  • Electrical operation
  • Hydraulic operation
  • Hydraulic operation

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