Description

Linde R 20P Training Manual – Factory Electrical Diagnostics for the Reach Truck

Let me tell you straight: if you’re chasing electrical gremlins on a Linde R 20P reach truck and you don’t have the factory documentation, you’re wasting time. I’ve seen too many guys try to reverse‑engineer the LTM transistor control with a multimeter and a prayer. That’s how you smoke a controller board. This 26‑page Training Manual is the OEM’s own breakdown of the electrical system – not some aftermarket rewrite with missing pins. It’s a supplement to the Type 113 manual, but it covers everything that’s different on the R 20P (Type 114). If you’re doing drive control diagnostics or steering logic, start here.

Linde R 20P Training Manual – Factory Documentation for the Reach Truck

This is a genuine Linde Service Training document. Page 1 states it’s for in‑house training use only, but you can put it on your bench. It covers the electrical system exclusively – no engine, no hydraulics beyond references. The focus is on the stepless transistor control (LTM) for the drive and the steering pump motor logic. Every current path for forward, reverse, coast, and brake is mapped out. If you need the full base knowledge for the reach truck family, you’ll want the Type 113 manual alongside this one.

7 Subsystems Under the Electrical Section

Section 3.6 splits the electrical system into three main blocks: drive control (Fahrsteuerung), steering control (Lenksteuerung), and wiring diagrams (Stromlaufpläne). Within the drive control you get the main current path, the control current path, and specific subsections like travel release, direction selection for single‑pedal vehicles, and the thermal switch. Each current path is shown in a schematic with component labels. The steering control section – page 11 – explains how the pump motor only activates when the travel pedal is pressed or the vehicle moves. No parasitic drain while idling.

Drive Control Logic: Forward, Reverse, and Braking

Pages 3 through 6 detail the exact current flow for forward travel (against fork direction), reverse (in fork direction), the free‑wheel circuit, and the braking circuit. The manual uses German labels, but the schematic symbols are universal. If you’re replacing a drive controller or troubleshooting a no‑move condition, trace these paths first. The R 20P uses two drive motors for poor floor conditions – that’s unique to Type 114. Don’t confuse it with a single‑motor unit.

Steering Control – How the Pump Motor Activates?

The steering electronics (Lenkelektronik) are covered in subsection 3.6.2, page 11. The steering pump motor is switched on only when the travel pedal is actuated or the vehicle is in motion. This saves battery and prevents unnecessary pump noise. If you have a steering dead spot or the pump runs continuously, the manual shows the control logic that triggers the motor relay. The steering position indicator (optional) is also mentioned – it displays the drive wheel angle on the instrument cluster.

Wiring Diagrams: Single‑Lever vs. Central Control Lever

Section 3.6.3 gives two complete wiring diagrams: one for individual lever operation (Einzelhebelbetätigung) and one for the central control lever (CCL). Both are reproduced in the manual – pages 14 and 16. These are factory prints with component numbers and wire colors. If you’re converting a truck from one control type to the other, these diagrams are gold. The combination instrument cluster’s LED indicators for brush wear, brake fluid level, and motor overheating are also shown in the diagrams. That’s not something you’ll find in a generic wiring book.

Who This Training Manual Serves

If you’re a shop owner or fleet mechanic maintaining Linde reach trucks, this manual is a solid supplement. It’s not a full repair manual – no step‑by‑step overhaul procedures, no torque specs. But for electrical diagnostics on the R 20P, it’s the only source I trust. The training manual assumes you already understand the Type 113 base platform. If you’re a DIY guy with a single R 20P and you’re comfortable reading schematics, you’ll get value from it, especially if you’re dealing with drive control or steering issues. Beginners: pair this with the base manual and a good multimeter. Don’t skip the wiring diagram section.

If you work on other Linde models, check the Linde H100-600, H120-1200, H140-1200, H160-600, H160-1200 2007 Training Manual for bigger IC trucks. For electric three‑wheelers, the Linde E 20, E 25, E 30 Training Manual – Factory Forklift Procedures covers similar drive control logic. And the Linde E-Stapler E 20, E 25, E 30 Training Manual – OEM Factory Specs has wiring diagrams for that series as well. Outside Linde, understanding a Manual Transmission won’t help here – this is pure electrical – but if you’re also dealing with engine mechanicals, Cylinder Head Mechanics is a different area entirely.

FAQ – Linde R 20P Training Manual

Does this manual cover the entire R 20P forklift?

No. It covers only the electrical system (section 3.6) as a supplement to the Type 113 manual. Hydraulics, mast, and drivetrain are not included.

Is this manual in English?

The original is in German. Schematics and component labels are in German as well. If you cannot read German schematics, pair it with a translation guide for the key terms.

What torque specs are included?

None. This is a training manual focusing on circuit logic and component function, not mechanical fasteners. You need the separate service repair manual for torque values.

Can I use this to fix a steering issue?

Yes – if the problem is electrical (pump motor activation, relay control, or sensor signals). The steering control section (page 11) explains the logic and wiring. For mechanical steering gear, you need the service manual.

I’ve been through enough aftermarket manuals that miss the thermal switch bypass or the free‑wheel diode. This factory 26‑page training document gives you the real current paths as designed by Linde. It’s a small section, but it’s the right one. Access the Factory Manual and keep it next to your test light.