Official Clark NPR 17, NPR 20 & NPR-345 Electric Stand-Up Rider Lift Truck Service Manual - Planned Maintenance, Diagnostics & Overhaul Procedures (1994)

Official Clark NPR 17, NPR 20 & NPR-345 Electric Lift Truck Service Manual (1994)

Maximize the uptime and safety of your fleet with the definitive 1994 Service Manual for Clark NPR Series electric stand-up rider lift trucks. This high-level technical guide, specifically identified as technical publication SM-587, is the identical resource used by factory-certified technicians to maintain, diagnose, and overhaul the Clark NPR-345 technical series. Whether you are managing the NPR 17 or the higher-capacity NPR 20, this manual provides the granular detail necessary to keep your 24V or 36V systems running at peak performance.

Precision Coverage for the NPR-345 Series

This manual is uniquely tailored to the engineering specifications of the Clark NPR-345 series. It includes critical data for:

• Clark NPR 17 (1994)
• Clark NPR 20 (1994)
• Clark NPR 345 (1994)
• Clark NPR 22 (1994)

Deep-Dive Technical Content

Moving far beyond basic maintenance, this manual offers exhaustive procedures for complex shop tasks:

• Advanced Diagnostics: Decode EV-T15 Solid State Control status codes (from -01 to -99) and utilize the integrated oscillator card settings to troubleshoot traction issues instantly.
• Full Motor Overhaul: Complete service instructions for Traction Motors, Pump Motors, and the Auxiliary/Steer Pump Motor, including brush inspection charts and commutator resurfacing specs.
• Hydraulic Precision: Step-by-step overhaul procedures for Tilt, Reach, Rail Lift, and Free Lift cylinders, plus exact relief valve pressure settings (1550-1650 psi for auxiliary and 2650-2750 psi for lift circuits).
• Brake System Mastery: Detailed adjustment of the spring-applied, hydraulically-released motor and caster brakes, including the vital 2-1/4 inch spring length calibration.
• Electrical Schematics: Full-page wiring diagrams and sequence of operation charts for 24-volt and 36-volt configurations.

Engineering Specifications & Serial Data

Gain access to factory-spec performance data to ensure your truck meets original standards:

• Travel Speeds: Verification for loaded and unloaded speeds (up to 7.2 mph for 36V models).
• Torque Specs: Critical values for drive wheel fasteners (124-139 lb-ft) and bearing adjustments.
• Battery Requirements: Minimum weights and compartment dimensions for NPR 17 (1185 lbs min) and NPR 22 (1400 lbs min) to maintain truck stability.
• Lubrication Constants: Exact fluid requirements including MS-68 hydraulic oil standards and Clark-specific lubricants like part number 1802300 threadlocker.

The Professional Advantage

Designed for clarity in the shop, this manual features Pictorial Indexes that allow you to quickly locate components such as the Multi-Function Control Handle or the Axle Articulation mounting blocks. By following the Planned Maintenance (PM) schedules—ranging from 50 to 250 operating hours—you effectively eliminate unscheduled downtime and protect your investment from costly component failures like pin turning in lift chains or brinelling in motor bearings.

Ensure your maintenance team has the specific technical knowledge required for the NPR 17/20 series to guarantee operator safety and operational efficiency every shift.