Clark OP15 & SM566 Lift Trucks Factory Service Manual (P/N SM529)

• Official Clark Equipment Company OEM publication (SM529), dated 1987
• Covers 1987 and newer Clark OP15 and SM566 order selector lift trucks
• Documents component specifications for the battery, control handle, steer pump, drive unit, and hydraulic systems
• Serves as the foundational technical reference for professional maintenance, overhaul, and system diagnostics

Component and System Documentation

The Clark SM529 manual delivers a comprehensive breakdown of the SCR control panel, drive unit assembly, steering mechanism, and hydraulic components. Each major system group features dedicated sections covering removal, inspection, and reassembly parameters. You will find specific details outlining battery cleaning and drive motor maintenance. It also details the 500-volt megger motor insulation testing. Working on industrial lift trucks involves high-voltage electrical components and pressurized hydraulics; following the manufacturer's specified safety procedures detailed in these chapters is critical to prevent equipment damage or personal injury. The documentation emphasizes planned maintenance schedules, highlighting lubrication charts, hydraulic fluid cleanliness standards, and exact brake adjustment parameters for the hydraulically released, mechanically applied brake system.

Technical Specifications and Maintenance Data

Precise tolerances make the difference between a reliable order selector and costly downtime. This manual provides those critical numbers. Technicians gain access to drive motor insulation standards, hydraulic system pressure thresholds, and required torque values for high-stress fasteners like drive unit mounting bolts and wheel lug nuts. The electrical sections list exact resistance values for contactor coils alongside potentiometer settings for the SCR card. You will also find clearance standards for upright rollers and lift chains. When servicing the 14:1 ratio drive unit or rebuilding the torque generator, the text outlines drive gear shimming measurements, including total indicated runout (TIR) and end-play adjustments.