STILL R20 Electric Fork Truck Service Manual 2001–2007 (P/N 171 085 - 01.06)

• Covers the 2001–2007 STILL R20 series electric fork trucks, encompassing the R20-15, R20-16, R20-17, and R20-20 models
• Official 246-page STILL workshop publication (Ident. Nr. 171 085 - 01.06, released January 2006)
• Features 58 exploded-view diagrams, 8 detailed electrical schematics, 14 torque specification tables, and 4 troubleshooting summaries for comprehensive repair reference
• Integrates updated specification sections for 2007 model year revisions and specific maintenance data for the entire R20-15 through R20-20 lineup
• Examines critical assemblies including Danfoss steering units, Stilltronic SCR drive controllers, priority valves, wheel reduction gears, hydraulic gear pumps, return line filters, and contactor control panels
• Outlines maintenance on elevating masts, thyodule modules, accelerator pedal transmitters, curve limit switches, battery discharge indicators, service brakes, and forced ventilation fans

Component and System Documentation

This publication provides a thorough breakdown of the chassis frame, steering axle, drive units, and electrical control systems. It details the mechanical configuration of the steering axle. You will find specifics on steering cylinder mounting, toothed rack function, and steering turntable bearing assembly. The manual also outlines trail wheel hub construction, gear box reduction drives, and the operational logic behind the electronic steering and drive pulse controllers. To further facilitate visual fault isolation, the PDF manual provides wiring diagrams, hydraulic circuit diagrams, detailed cross-sectional views, pulse controller logic flow charts, dimensional drawings for fork arms, and terminal pinout diagrams. Mechanics can rely on step-by-step instructions for advanced procedures that typically require specialized dealer servicing. These tasks include turning down the commutator on a lathe, undercutting the motor commutator mica, adjusting the pinion shaft bearings with shims, relining the brake shoes, and setting the lift chain tension on Telescopic, Hi-Lo, and Triple stage masts. By referencing the exact factory test values and resistance parameters for the sensors and Stilltronic printed circuit boards, this resource prevents costly trial-and-error component swapping, directly reducing diagnostic downtime on the shop floor.

Specification and Reference Data

Factory reference values for critical components are listed throughout the documentation to support accurate diagnostics and part replacement. Main-circuit and control-circuit fuse ratings, steering pressure relief valve settings (70 + 5 bar), and drive gearbox torque loadings are clearly documented. For example, it specifies the required torque for steering turntable mounting bolts at 195 Nm, alongside wheel hub bolt requirements that vary by model. Electrical data includes sensor pick-up reference values and pulse controller operating voltages for both 24-volt and 48-volt systems. Prior to initiating any service or diagnostic work, ensure you consult a certified technician and observe all standard shop safety protocols, as working on high-voltage fork truck systems and pressurized hydraulics presents serious hazard risks. This technical manual serves as an essential descriptive resource for planning any major overhaul or routine repair.