Description
CLARK GPH/DPH 50, 60, 70 & 75 Forklift Service Manual
The CLARK GPH/DPH 50, 60, 70 & 75 Service Manual is a comprehensive technical reference for servicing and maintaining these CLARK forklift trucks. The manual is identified as Service Manual SM 591, August 1993 and is organized using CLARK’s pictorial group and section system.
The manual provides a structured reference for workshop maintenance, troubleshooting, inspection, adjustment and component service. The pictorial group index shown near the beginning of the manual helps technicians quickly locate information for major truck systems.
| Specification | Details |
|---|---|
| Manual Type | Service / Workshop Manual |
| Manufacturer | CLARK Material Handling |
| Model Series | GPH 50, GPH 60, GPH 70, GPH 75 / DPH 50, DPH 60, DPH 70, DPH 75 |
| Manual Number | SM 591 |
| Publication Date | August 1993 |
| Document Format | |
| Total Pages | 794 Pages |
| Download Size | 77 MB |
| Coverage | Service, Maintenance, Troubleshooting & Repair |
| Engine Coverage | Perkins 4.248.2, GM 3-53N Detroit Diesel, Ford CSG-649 Gas/LPG |
| Main Systems | Engine, Cooling, Fuel, Transmission, Electrical, Drive Axle, Steering, Brakes, Hydraulics, Uprights & Lift Chains |
| Maintenance | Planned Maintenance, PM Intervals, Inspections & Lubrication |
| Searchable | Depends on PDF file structure |
| Delivery | Digital PDF Download |
Comprehensive Planned Maintenance Information
The planned maintenance section provides practical inspection and maintenance procedures for keeping the forklift in reliable operating condition. It covers daily maintenance checks, PM intervals, visual inspections, functional tests, fluid checks, lubrication and lift-chain maintenance.
According to the manual’s maintenance section, technicians are guided through inspection of items including the overhead guard, carriage and upright, forks, wheels and tires, brakes, steering system, battery, engine cooling system, engine oil, hydraulic sump, transmission fluid, drive axle and lift chains.
Engine & Powertrain Service
The manual contains a dedicated Group 00 ā Engines section. The contents identify engine troubleshooting together with workshop information for Perkins 4.248.2 diesel engines, GM 3-53N Detroit Diesel engines, and Ford CSG-649 gas/LPG engines, along with engine removal and replacement procedures.
The engine troubleshooting material covers problems such as failure to start, uneven running, loss of power, abnormal engine temperature, excessive oil consumption, black or white exhaust smoke, slow acceleration, incorrect timing and abnormal engine noises.
Hydraulic, Brake & Steering Systems
Extensive coverage is provided for the hydraulic system, including the hydraulic sump, filters and pump, hydraulic control valve and lift circuit, hydraulic troubleshooting, pressure checks, valve overhaul, control-valve linkage and hydraulic schematics.
The braking and inching system section covers system description and troubleshooting, pedal adjustment, bleeding, inspection and overhaul, master cylinders, hydro-vac overhaul and parking brake adjustment. Steering and steer-axle information includes steering troubleshooting, steering gear removal, hydraulic steering control, axle bearings, steering cylinder service and adjustments.
Uprights, Lift Chains & Forks
For the forklift lifting system, the manual covers upright inspection and adjustment, carriage checks, cylinder repair, lift-chain maintenance, chain adjustment, chain inspection and measurement, lubrication and replacement. The planned-maintenance pages also provide specific guidance for checking lift-chain wear and adjustment.
The manual also addresses forks, including inspection for cracks, bending and wear, fork blade condition, fork locking pins and dimensional checks.
Electrical & Supporting Systems
The electrical section listed in the contents includes wiring color codes, electrical diagrams, electrical checks, starter and alternator information. Additional systems covered include cooling, fuel, transmission, drive axle, wheels and tires, counterweights and other major truck components.
Useful Workshop Reference
With 794 pages in the complete manual, this is a substantial technical reference for professional forklift maintenance and repair work. It is particularly useful when diagnosing faults, planning preventive maintenance, performing component adjustments or carrying out major service procedures.
Manual identification: CLARK Service Manual SM 591, covering the GPH/DPH 50/60/70/75 forklift range. The supplied sample shows the original CLARK Material Handling Company technical publication format and its detailed group-based workshop organization.
Reference note: The uploaded sample is a 25-page preview of the complete manual and is used to verify the manual’s structure and covered subjects. The full product is listed as 794 pages.
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