Clark C500-35 through C500-55 Forklift Service Manual

Complete planned maintenance and adjustment procedures for Clark C500-35, C500-40, C500-45, C500-50, C500-55 forklifts. Includes detailed guidance for all systems. PN PMA 273.

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Clark Models Covered & Key Technical Specifications

Models: Clark C500-35, Clark C500-40, Clark C500-45, Clark C500-50, Clark C500-55
Sub-models / Variants: C500 355 Series, H30, H40, H50, Y40, Y45, Y50, Y55, SY60, HY40, HY50, S60
Build Years: 1973–1984
Technical Data:

  • Idle speed (Standard): 500–550 RPM
  • Governor no-load governed speed: 2350 RPM
  • Ignition timing: 5° before top dead center
  • Spark plug torque: 35 lb-ft
  • Valve tappet clearance (Exhaust): 0.020 in
  • Valve tappet clearance (Intake): 0.010 in
  • Fuel pump pressure: 4.0–6.0 PSI
  • Transmission fluid change interval: 1000 hours
  • Stall speed (Normal): 1450–1600 RPM
Technical Specifications
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Document Number / Seller:
29992 / Jessica Reed
File Size:
55.92 MB
File Type:
PDF
Language:
English
Pages:
335
Printable:
Yes
Category:
Forklift
Last updated / verified
Mar 17, 2026

Clark Manual Features & Content Preview

Planned Maintenance for Clark C500 Series Forklifts

  • Covers 1973–1984 Clark C500-35 through C500-55 industrial lift trucks, including H, Y, SY, and HY sub-model variants
  • Official Clark publication PMA-273, with revisions spanning July 1977 through May 1984
  • Contains 80+ maintenance illustrations, technical charts, and testing sequences for engine, cooling, and hydraulic systems
  • File delivered as a direct download the moment payment clears
  • Indexed PDF search covers every chapter and appendix
  • Detailed coverage of the 355 series platform for shop-floor maintenance programs
  • This publication remains the primary reference for maintaining the C500 industrial line according to factory-recommended intervals

Planned Maintenance Scope

This Clark C500 maintenance publication details the structured procedures required to keep industrial trucks in safe operating condition. It includes guidelines for shift-start inspections, preventive maintenance schedules based on 50 to 250 operating hour intervals, and specific instructions for adjusting major sub-assemblies. The material focuses on maintaining system integrity, minimizing fire risks, and identifying worn components before they require costly emergency repair.

Technical Systems and Specifications

Maintenance groups in this manual provide data on engine tune-up, fuel system testing, governor adjustment, and hydraulic system inspections. Technical sections detail the necessary values for spark plug gaps, intake and exhaust valve tappet clearances, and fuel pump pressures. The document provides reference values for stall testing the transmission, with standard operating ranges of 1450–1600 RPM documented for performance evaluation. Note: This page is a contents overview for the manual. It does not provide repair or diagnostic instructions.

An official 335-page Clark Industrial Truck Division manual documenting the 1973–1984 C500 series forklifts, providing essential maintenance and adjustment specifications for the full range of heavy-duty industrial models.

Manual FAQ, Purchase & Download Details

Does this maintenance document contain specific reference tables for lubrication guides, specification data, and inspection forms? keyboard_arrow_down

Manual includes a dedicated section at the rear that covers lubrication charts, technical specification tables, and inspection forms grouped by section numbers for reference.

What depth of coverage does the manual provide for engine, transmission, and hydraulic system inspections? keyboard_arrow_down

Content covers scheduled maintenance routines for forklift systems, including visual inspections of engine compartments, transmission components, and hydraulic assemblies. It also provides reference information on pressure checks and operational performance indicators across the C500-35 through C500-55 model series.

Which publication markers or revision labels are shown in the PDF document? keyboard_arrow_down

Cover page and internal sections reference the document as PMA 273, with various revision dates noted such as the 10th Revision and later updates.

Can I find component breakdown diagrams or exploded views within the manual pages? keyboard_arrow_down

Yes, the manual contains numerous illustrative figures that show component configurations and assembly layouts for systems like the upright, fork assemblies, and power steering. These illustrations provide visual references for the mechanical systems described in the maintenance chapters.

Is the manual designed to include information on maintenance intervals, tightening specifications, and general adjustment procedures? keyboard_arrow_down

Document contains detailed maintenance schedules based on operating hours, alongside references to adjustment procedures for components like brakes, steering, and upright upright mechanisms. It also outlines essential safety practices and technical guidelines for maintaining machine legibility, cleanliness, and structural condition.

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