CLARK S20 S25 S30 S35D Forklift Service Repair Manual

Keep your CLARK forklift service and maintenance work organized with this comprehensive
S20/25/30/35D Service Manual for ISUZU Engine Trucks. The manual is identified as
CLARK Service Manual SM 1081, Part No. 8146155, Revision 1.8,
dated February 2020. It is intended as a detailed technical reference for servicing CLARK
forklifts in the 2,000–3,500 kg rated capacity range.

The sample manual begins with extensive Safe Maintenance procedures covering
safe parking, lifting, blocking, jacking, towing and truck handling procedures. It also provides
periodic service schedules and planned maintenance procedures designed to help technicians
systematically inspect, lubricate, adjust and test the truck.

Comprehensive Service Coverage

The manual is organized into service groups covering the major mechanical, hydraulic,
electrical and structural systems of the forklift. The contents include the
ISUZU engine, cooling system, intake and exhaust system, transmission, electrical system,
drive axle, wheels and tires, brake/inching system, steering system, steer axle, hydraulic pump,
hydraulic control valve, tilt cylinders and upright assembly.

The service information is particularly useful for workshop technicians carrying out inspections,
troubleshooting, component servicing, adjustments, lubrication and scheduled maintenance.
The manual also includes specifications and technical reference information within the service
group structure.

Maintenance & Planned Service Information

The periodic service section provides maintenance intervals based on operating hours. The sample
includes schedules for daily or 8–10 hour service, 450–500 hour service, 900–1000 hour
service and 2,000 hour service. Maintenance tasks include engine oil and filter service,
cooling system inspection, transmission service, electrical checks, axle maintenance, brake
inspection, steering maintenance, hydraulic system service and upright/lift component inspection.

The manual’s Planned Maintenance Program also provides a systematic approach to visual inspections,
functional tests, lubrication, fluid-level checks, critical fastener checks and operational testing.
The sample shows dedicated procedures for checking the carriage, load backrest, upright, forks,
wheels and tires, braking system, steering system and operator controls.

Technical Diagrams & Service References

The manual contains technical illustrations and service diagrams to help identify component
locations and maintenance points. The contents diagram identifies major truck systems including
the engine, cooling system, transmission, drive axle, hydraulic system, steering, brake system,
upright and chassis components.

Safety and lifting illustrations are also included. For example, the sample shows recommended
lifting and blocking points, upright blocking procedures and truck jacking arrangements.
These visual references can help technicians understand the service procedures before beginning
maintenance work.

Manual Contents

• Group SA – Safe Maintenance
• Group PS – Periodic Service
• Group 00 – Engine (ISUZU)
• Group 01 – Cooling System
• Group 03 – Intake and Exhaust System
• Group 06 – Transmission
• Group 13 – Electrical System
• Group 20 – Drive Axle
• Group 22 – Wheels and Tires
• Group 23 – Brake / Inching System
• Group 25 – Steering Column and Gear
• Group 26 – Steer Axle
• Group 29 – Hydraulic Pump, Sump and Filters
• Group 30 – Hydraulic Control Valve / Lift Circuit
• Group 32 – Tilt Cylinders
• Group 34 – Upright
• Group 38 – Counterweight, Sheet Metal & Chassis
• Group 40 – Specifications

Ideal for Workshop & Maintenance Use

This digital service manual is a valuable reference for forklift technicians, mechanics,
maintenance departments and workshops servicing CLARK S20, S25, S30 and S35D models.
It brings service procedures, scheduled maintenance information and system references together
in one searchable PDF document.

The supplied manual is a digital PDF document and is suitable for viewing on
a computer, tablet or other PDF-compatible device.

Manual reference: CLARK SM 1081, Part No. 8146155, Revision 1.8,
February 2020. The information and structure described above are based on the supplied sample
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