STILL R20-15, R20-16, R20-18, R20-20 Electric Forklift Workshop Manual (P/N 164526)

• Covers 2008– STILL R20-14 through R20-20, R20-15i, and R20-18i electric fork trucks, including various turntable and swing-axle configurations.
• Official STILL GmbH publication Ident-Nr. 164526 (en) (November 2003).
• Includes 12 detailed wiring and assembly diagrams, 5 torque-loading specification tables, and 2 steering-system geometry charts.
• 253-page PDF covering every chapter and appendix.
• Explores planetary reduction gears, asynchronous squirrel-cage motors, CAN bus configurations, battery computers, and FleetManager consoles.
• Details joystick proportional systems, service brake adjustments, lift chain tensioning, hoist cylinders, tilt mechanisms, and hydraulic priority valves.

Component and System Documentation

Mechanics need fast answers during complex diagnostics. This manual delivers exactly that, providing the specific calibration settings and hydraulic pressure values required for the 2008– model lineup. By eliminating guesswork during electrical and hydraulic troubleshooting, technicians can utilize the provided wiring diagrams, hydraulic circuit diagrams, controller block diagrams, and reduction gear cross-sections to trace faults directly to their source, minimizing downtime and saving on expensive dealer repairs. The reference breaks down technical data and mechanical configurations for critical systems. The chassis frame section maps out the welded steel structure and counterweight specifications. Need to service the steer axle? The documentation clearly contrasts the maintenance requirements for articulating versus turnable axle variants. Steering control data highlights the Danfoss OSPC 40 LS 150 component parameters, while the hydraulic section outlines the internal workings of the 2A7 hydraulic controller. Electrical installation sections outline the layout of the controller A9, contactor 1K1, and fuse carrier A7, providing exact motor connection diagrams for the dual-motor front drive configuration.

Practical Shop Value & Maintenance

This reference provides the exact factory sequences needed to execute in-house repairs. It outlines step-by-step procedures for adjusting the service and parking brakes, setting the proper lift chain tension on Hi-Lo and triple masts, calibrating the double potentiometer for the two-pedal control, and overhauling the steering turnable bearings. Understanding the unique quirks of these electric trucks is vital for a successful repair. For example, a frequent diagnostic pitfall involves the angle of lock transmitter; failing to set the precise 1 mm gap to the timing wheel will trigger an Error 119, drastically cutting the truck's travel speed. Additionally, when replacing the 2A7 hydraulic controller, technicians must verify whether the truck utilizes the older 2K04 external safety relay or the integrated safety function to prevent severe parameterization conflicts.

Specification Highlights

Technical data provides the crucial reference values you need for safe maintenance service and system troubleshooting. Wheel hub torque for turnable axles is specified at 86 Nm, while the articulating axle variant requires 145 Nm. Counterweight bolt torque values hit 660 Nm in the frame data section. While coolant capacities are not relevant for these electric trucks, battery electrolyte density is strictly listed at 1.28 kg/l. The steering angle lock is documented at 80–82° for articulating units and 90° for turnable models. Reference values for the steering relief valve are listed at 90 +5/0 bar for the hydraulic system. Because working on industrial high-voltage electrical and pressurized hydraulic systems carries inherent risks, this technical reference is intended strictly for qualified service personnel following industry-standard safety protocols.