CLARK C60 C70 C75 L PSI 4X LPG Forklift Service Manual – SM 1057

Description

The CLARK C60 C70 C75 L PSI 4X LPG forklift service manual is the complete workshop reference for the PSI 4X 4.3L LPG engine truck. Book No. SM 1057 (Rev 1.3) covers every major system on the C60, C70 and C75 L models, from safe lifting and blocking procedures through engine overhaul, transmission rebuild, hydraulic valve service, drive axle work and the complete electrical and LPG fuel system. At 862 pages it is the full service document rather than a condensed extract, written for technicians who need real specifications, torque values, wear limits and diagnostic charts rather than a generic overview.

File Details

• Manual type: Complete workshop / service manual
• Brand: CLARK
• Models covered: C60 L, C70 L, C75 L (PSI 4X engine truck)
• Engine: PSI 4X 4.3L LPG, 6-cylinder
• Language: English
• Page count: 862
• File format: PDF
• Document number: Part No. 8139176 / Book No. SM 1057
• Revision: Rev 1.3
• Publication date: May 2021

Chapters Covered

This CLARK C60 C70 C75 L service manual is organised into the manufacturer groups shown on the truck layout diagram at the front of the book:

• Group SA – Safe Maintenance: safety signs and messages, safe maintenance practices, lifting, jacking and blocking the truck, towing
• Group PS – Periodic Service: maintenance schedules, service chart and lubrication points, the planned maintenance program
• Group 00 – Engine (LPG PSI 4X): engine mechanical, diagnostic information and procedures, inspection removal and installation, description and operation, PSI fuel system, electrical section, Diagnostic Scan Tool (DST)
• Group 01 – Engine Cooling System: specifications and description, troubleshooting, testing and maintenance, radiator removal and replacement
• Group 03 – Intake and Exhaust System: specifications, troubleshooting, intake system service, exhaust systems
• Group 08 – Transmission LPG (T12313): disassembly, first and second clutch, third clutch, forward and reverse clutches, regulator valve, cleaning and inspection, troubleshooting, transmission controller, removal and installation
• Group 13 – Electrical System: cautions, specifications and features, circuit diagrams and component arrangement, instrument pod, air conditioning (option)
• Group 21 – Drive Axle (LPG): system operation, differential carrier assembly, drive axle, problem and cause, disassembly and reassembly
• Group 22 – Wheels and Tires: specifications and description, pneumatic wheels and tires
• Group 23 – Brake System: braking and inching system, service brake troubleshooting, pedal and linkage adjustments, brake bleeding, brake valve service, parking brake service
• Group 25 – Steering Column and Gear: specifications, troubleshooting, column and component removal and replacement, relief pressure check and adjustment, steering gear overhaul
• Group 26 – Steer Axle: specifications, wheel bearing maintenance and adjustment, removal and replacement, overhaul, steer cylinder removal and overhaul
• Group 29 – Hydraulic Sump, Filters, and Pump: specifications, troubleshooting, pump removal and installation
• Group 31 – Hydraulic Control Valve (Daesung Nachi): valve operation, hydraulic circuit, disassembly, assembly, testing
• Group 32 – Tilt Cylinders: specifications, checks and adjustments, removal and replacement, overhaul
• Group 34 – Uprights: specifications, troubleshooting, inspection, roller clearance and shim adjustment, cylinder service, chain inspection and replacement, fork and carriage removal, upright removal and replacement
• Group 38 – Counterweight and Chassis: counterweight removal and replacement, overhead guard / operator cell, floorboard and seat deck, operator seat
• Group 40 – Specifications: nameplates and decals, general specifications, hydraulic fitting tightening procedures

Taken as a whole the CLARK C60 C70 C75 L PSI 4X service manual gives a technician the complete service path for this truck: diagnosis of a fault, removal of the affected assembly, full disassembly and inspection with wear limits, reassembly with correct torque and sealant practice, and the final adjustment or drift test that confirms the repair. Because the same book also carries the periodic maintenance schedule, lubrication chart and service intervals, it doubles as the shop reference for routine servicing rather than breakdown work alone.

Engine and Powertrain Coverage

The engine portion covers the PSI 4X 4.3L LPG unit in full. Base engine diagnosis walks through misfire, oil consumption, coolant consumption and abnormal internal noise, with a compression test procedure and a table of causes by camshaft speed or crankshaft speed. The mechanical specification chapter lists clearances for the block, crankshaft, connecting rods, pistons and cylinder heads, plus the fastener tightening values for main caps, rod bolts, cylinder head bolts, balance shaft and flywheel. Removal and installation sections are illustrated with exploded views for the intake manifold, exhaust manifolds, valve rocker arms and pushrods, cylinder heads, oil pan, oil pump, front cover, timing chain and sprockets, balance shaft, camshaft, pistons and the crankshaft and bearings.

The LPG fuel system is documented in its own PSI section covering the fuel supply, electric fuel lock-off valve, Direct Electronic Pressure Regulator (DEPR / EPR), air fuel mixer, light duty two-stage vaporizer, electronic throttle control device, engine control module, three-way catalytic converter and heated exhaust gas oxygen sensors. Diagnostic trouble codes are listed both by DTC number and by SPN:FMI, with the conditions for setting each code and the diagnostic chart needed to clear it.

The transmission group rebuilds the DANA T12313 power shift unit clutch by clutch, covering the first and second clutch, third clutch and forward and reverse clutches, the regulator valve and the transmission controller. The drive axle group covers the differential carrier, the planetary hub reduction, the wet disc brake and the complete disassembly and reassembly sequence with the shim and backlash adjustment values.

Hydraulics, Uprights and Chassis

The hydraulic groups cover the sump, suction screen, return line filter and pump, the Daesung Nachi main control valve with its lift, tilt and auxiliary sections and relief valve, the tilt cylinders and the upright assembly. Roller side-clearance checks, shim adjustment, lift chain inspection and length adjustment, cylinder shimming, racking checks and drift tests are all covered with the acceptance values printed in the text. The counterweight and chassis group covers removal and replacement of the counterweight, overhead guard and operator cell, floorboards, cowls and seat deck.

Electrical System and Diagnostics

The electrical group carries the cautions for working on the system, jumper starting procedure, fuse assignment, circuit diagrams, component arrangement drawings and a detailed instrument pod section. The pod section explains the engine shutdown function, neutral start and anti-restart, parking brake interlock, gauge and indicator behaviour and the menu structure of the dash display, including the error codes that the instrument pod can show.

Specifications, Torque Values and Service Intervals

Group 40 collects the nameplates and decals, the general specifications and the hydraulic fitting tightening procedure. Torque values appear throughout the individual groups as well as in the specification tables – for example upright mounting pin bolts, counterweight mounting bolts, tilt cylinder yoke clamp bolts and wheel nut torques. Fluid capacities, tire pressures, gear ratios, lift and lowering speeds and the periodic service intervals are listed in the specification chapters and the periodic service chart.

Who This Manual Is For

This is a workshop manual written for the service technician, fleet workshop or owner who maintains the truck in-house. Every job is presented with the sequence of operations, the components involved and the values needed to return the machine to specification. Diagrams, exploded views, cross-sections and diagnostic tables support the text so a fault can be traced before parts are removed.

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With the CLARK C60 C70 C75 L PSI 4X LPG forklift service manual on hand you can diagnose engine, transmission, hydraulic, brake, steering and electrical faults, remove and overhaul major assemblies, set up the upright and tilt cylinders correctly and follow the periodic service schedule with the correct lubricants and intervals. Working from the printed torque values, clearances and adjustment limits is what keeps a lift truck safe and productive; guessing invites premature failure, leaks and downtime. This CLARK C60 C70 C75 L service manual is delivered as an instant PDF download after payment, with no shipping and no waiting – open it on a laptop, tablet or phone in the workshop, or print the pages you need for the job in front of you.