Clark C60/C70/C75/C80 Forklifts OEM Service & Repair Manual

Part No. 8051043 Book No. SM 751 Feb. 2009 SERVICE MANUAL RATED CAPACITY : 6000– 8000kg C 60/70/75/80 D C 60/70/75 L

CONTENTS SM 751 CONTENTS-1 CONTENTS Group SA. Safe Maintenance Group PS. Periodic Service Group 00. Engine Group 01. Engine Cooling System Group 02. Fuel System Group 03. Intake and Exhaust System Group 06. Transmission-Diesel (3WG-116, Old) Group 07. Transmission-Diesel (3WG-94EC, New) Group 08. Transmission-LPG (T12313) Group 13. Electrical system Group 20. Drive Axle Group 22. Wheels and Tires Group 23. Brake System Group 25. Steering Column and Gear Group 26. Steer Axle Group 29. Hydraulic Sump, Filters, and Pump Group 30. Hydraulic Control Valve (HUSCO) Group 31. Hydraulic Control Valve (Daesung Nachi) Group 32. Tilt Cylinders Group 34. Uprights Group 38. Counterweight and Chassis Group 40. Specifications Group 34. Upright Group 32. Tilt Cylinders Group 13. Electrical System Group 03. Intake System Group 00. Engine Group 01. Cooling System Group 25. Steering Column and Gear Group 38. Counterweight, Sheet Metal, & Chassis Group 06. Transmission-D (3WG-116) Group 07. TransmissionD- (3WG-94EC) Group 08. Transmission-L (T12313) Group 23. Brake System Group 30 / 31. Hydraulic Control Valve Group 29. Hydraulic Pump, Sump, and Filters Group 02. Fuel System Group 22. Wheels and Tires Group 26. Steer Axle

GROUP SA SM 751 SA-0 GROUP SA SAFE MAINTENANCE Safety ................................................................... Section 1 Lifting, Jacking, and Blocking the Truck ....... Section 2 Towing ................................................................. Section 3

Group SA, Safe Maintenance SM 751 SA-1-1 Safety Signs and Messages Safety signs and messages in this manual and on the lift truck provide instructions and identify specific areas where potential hazards exist and special precautions should be taken. Be sure you know and understand the meaning of these instructions, signs, and messages. Dam- age to the truck, death, or serious injury to you or other persons may result if these messages are not followed. NOTE This message is used when special informa- tion, instructions or identification is required relating to procedures, equipment, tools, pressures, capacities, and other spe-cial data. IMPORTANT This message is used when special precautions should be taken to ensure a correct action or to avoid damage to, or malfunc-tion of, the truck or a component. CAUTION ! This message is used as a reminder of safety hazards that can result in personal injury if proper precautions are not taken. WARNING ! This message is used when a hazard exists that can result in injury or death if proper precautions are not taken. DANGER ! This message is used when an extreme hazard exists that can result in injury or death or serious injury if proper precautions are not taken. The above terms have been adopted by Clark Material Handling Company. The same terms may be used in dif- ferent context in service literature supplied directly or indirectly by vendors of truck components. Safe Maintenance Practices The following instructions have been prepared from cur- rent industry and government safety standards applicble to industrial truck operation and maintenance. These recom- mended procedures specify conditions, methods, and accepted practices that aid in the safe maintenance of industrial trucks. They are listed here for the reference and safety of all workers during maintenance operations. Carefully read and understand these instructions and the specific maintenance procedures before attempting to do any repair work. When in doubt of any maintenance procedure, please con- tact your local Clark dealer. 1. Powered industrial trucks can become hazardous if maintenance is neglected. Therefore, suitable mainte-nance facilities, trained personnel, and procedures must be provided. 2. Maintenance and inspection of all powered industrial trucks shall be done in conformance with the manufacturer’s recommendations. 3. A scheduled planned maintenance, lubrication, and inspection program shall be followed. 4. Only trained and authorized personnel shall be per- mit-ted to maintain, repair, adjust, and inspect industrial trucks. Work should be performed in accordance with the manufacturer’s specifications. 5. Properly ventilate work area, vent exhaust fumes, and keep shop clean and floor dry. 6. Avoid fire hazards and have fire protection equipment present in the work area. Do not use an open flame to check for level or leakage of fuel, electro- lyte, oil, or coolant. Do not use open pans of fuel or flammable cleaning fluids for cleaning parts. 7. Before starting work on truck: a. Raise drive wheels off of floor and use blocks or other positive truck positioning devices. b. Disconnect battery before working on the electrical system. 8. Before working on engine fuel system of gasoline- or diesel-powered trucks, be sure the fuel shut-off valve is closed. Section 1 Safety

Group SA, Safe Maintenance SM 751 SA-1-2 9. Operation of the truck to check performance must be conducted in an authorized, safe, clear area. 10. Before starting to drive truck: a. Be in operating position. b. Be sure parking brake is engaged. c. Put direction control in neutral. d. Start engine. e. Check functioning of direction and speed controls, steering, brakes, warning devices, and any load handling attachments. 11. Before leaving truck a. Stop truck. b. Put directional control in neutral. c. Apply the parking brake. d. Stop the engine by turning off the ignition circuit. e. Put blocks at the wheels if truck is on an incline. 12. Brakes, steering mechanisms, control mechanisms, warning devices, lights, governors, guards, safety devices, and frame members must be carefully and regularly inspected and maintained in a safe operating condition. 13. Special trucks or devices designed and approved for hazardous area operation must receive special attention to ensure that maintenance preserves the original, approved, safe-operating features. 14. Fuel systems must be checked for leaks and condition of parts. Extra special consideration must be given in the case of a leak in the fuel system. Action must be taken to prevent the use of the truck until the leak has been corrected. 15. The truck manufacturer’s capacity, operation, and maintenance instruction plates, tags, or decals must be maintained in legible condition. 16. Batteries, motors, controllers, limit switches, protec- tive devices, electrical conductors, and connections must be inspected and maintained in conformance with good practice. Special attention must be paid to the condition of electrical insulation. 17. To avoid injury to personnel or damage to the equipment, consult the manufacturer’s procedures in replacing contacts on any battery connection. 18. Industrial trucks must be kept in a clean condition to minimize fire hazards and help in the detection of loose or defective parts. 19. Modifications and additions that affect capacity and safe truck operation must not be done without the manufacturer’s prior written approval. Capacity, operation and maintenance instruction plates, tags, or decals must be changed accordingly. This is an OSHA requirement. 20. Care must be taken to assure that all replacement parts, including tires, are interchangeable with the original parts and of a quality at least equal to that provided in the original equipment. Parts, including tires, are to be installed per the manufacturer’s procedures. Always use genuine CLARK or CLARK- approved parts. 21. Use special care when removing heavy components from the truck, such as counterweight, seat deck, upright, etc. Be sure that lifting and handling equipment is of the correct capacity and in good condition. Also, this removal may upset the stability of the truck. The frame must always be safely blocked for major component removal. NOTE You should also be familiar with additional operating and maintenance safety instructions contained in the following publica- tions: ANSI / ITSDF B56.1 : Operator Control-Industrial Tow Tractors (Safety Standard For Powered Industrial Trucks). NFPA 505: Fire Safety Standard for Powered Indus-trial Trucks: Type Designations, Areas of Use, Mainte-nance and Operation. Available from: National Fire Protection Assoc., Inc., Batterymarch Park, Quincy, MA 02269. General Industrial Standards, OSHA 2206: OSHA Safety and Health Standards (29 CFR 1910), Subpart N-Mater als Handling and Storage, Section 1910.178 Powered Industrial Trucks. For sale by: Superintendent of Docu- ments, U.S. Government Printing Office, Washington, DC 20402.

Group SA, Safe Maintenance SM 751 SA-2-1 WARNING ! Lifting or jacking any large piece of equipment such as your fork truck presents obvious hazards. It must be done with great care and forethought. Consult the truck weight tabulations in Group 40, “Specifications” to ensure that your lifting equipment is of adequate capacity. Section 2 Lifting, Jacking, and Blocking the Truck

Group SA, Safe Maintenance SM 751 SA-2-2 Safe Parking Before working on truck: 1. Park truck on a hard, level, and solid surface, such as a concrete floor with no gaps or breaks. 2. Put upright in vertical position and fully lower the forks or attachment. 3. Put all controls in neutral. Turn key switch OFF and remove key. 4. Apply the parking brake and block the wheels. WARNING ! Defective equipment can cause accidents. All tools and lifting equipment must be in good condition, meet the load capacity require- ments and have OSHA labels when required. Tools with defects can have failures causing severe injury or death. Lifting, Blocking, and Jacking Points Use the following illustration to locate general lifting, blocking, and jacking points on the truck. Read the procedures for raising, blocking, or jacking specific components of the truck to make sure you understand the correct, safe procedures WARNING ! Do not attempt to lift the truck by the overhead guard or the counterweight. Severe injury may result and the truck can be dam- aged. Raising Drive Wheels Off Floor This procedure uses the upright as a lever to lift the drive wheels off the floor and prevent accidents due to inadvert- ent powering of the drive wheels. 1. Park truck safely as described in “Safe Parking.” Block steer wheels. 2. Be sure upright trunnion bolts are tight. Bolt torques must be 75-80 Nm (55-59 ft-lb). 3. Start the engine. Tilt the upright fully back. Adjust upright height as necessary to put blocking under- neath the lower end of the upright. 4. Put a solid 100 x 100 mm (4 x 4 in) hardwood block under the front section of each upright rail. Put a 3-6 mm (.125-.250 in) steel plate on top of each block. 5. Tilt upright fully forward. This raises the drive wheels off the floor. Release the tilt control lever and turn engine OFF. Under Upright Under Frame Under Steer Axle Frame Mount Block Steel Plate

Group SA, Safe Maintenance SM 751 SA-2-3 6. Insert blocking under the frame behind the drive wheels or slip wheel cradles under the drive wheels. If using blocking, check for safe clearance between drive wheels and floor and blocks. NOTE When forks are raised as in illustration above, use shop rags, paper, or bright tape on fork tips to signal the danger of tripping. 7. Check for stable condition of the truck. Be sure that the blocks are located securely under the truck frame before operating the drive or working on truck. 8. Lower the drive wheels to the floor and remove the blocks by reversing the above procedure. Raising Truck with A Hoist When suitable equipment is available, the front of the truck may be raised by means of a hoist, with wheel cradles placed under the wheels or blocking placed under the frame. CAUTION ! When lifting the front of the truck watch truck for signs of lateral instability. It may tip sideways. You may have to support or guide the side of the truck or overhead guard to prevent tipping. 1. Park truck safely as described in “Safe Parking.” Block rear steer wheels. 2. Check trunnion bolts to make sure they are tightened to correct torque. Bolt torques must be 75-80 Nm (55-59 ft-lb). 3. To raise the front of the truck using the upright, spread two chains on the outer rail tiebar of the upright. WARNING ! Chain and hoist used to lift truck should be checked to make sure they are of safe lifting capacity. See the truck data plate for infor- mation. 4. Slowly lift truck and lower drive wheels onto the cradles or place blocking under frame prop points. 5. When maintenance work is completed, lower the truck to the floor by reversing the lifting procedure. Check to be sure no tools or equipment are under the truck or wheels. Rag Place chains here

Group SA, Safe Maintenance SM 751 SA-2-4 Blocking the Upright In Raised Position This procedure is used to safely provide clearance for access from the front of truck to components on or near the drive axle. Illustrations show upright with forks removed however, fork removal is not necessary 1. Park truck safely as described in “Safe Parking.” 2. Put blocks in front of and behind drive wheels. 3. Put wooden support blocks conveniently near upright rails before raising the upright. Use two 100 x 100 mm (4 x 4 in) hardwood blocks or equal, of about 300 x 300 mm (12 in) and 600 x 600 mm (24 in) length. NOTE For standard uprights, block may need length cut to suit. For triple stage uprights, the carriage may be blocked up, as shown. 4. Start engine and raise the upright carriage. 5. Hold the taller block against inner rail and lower the upright until carriage rests on block. 6. Hold the shorter block against the outer rail and lower the upright until inner rail rests on the block. 7. Reverse the procedure to remove blocking. Raising Rear of Truck The truck may be raised at the rear by jacking and blocking under the center of the frame member at either the front or rear steer axle mounting, or under the center section of the steer axle. Refer to truck data plate for truck weights. WARNING ! An incorrectly installed counterweight can move or fall unexpectedly. Never lift or block a truck using the counterweight. Failure to follow procedures outlined in this manual can result in injury or death. 1. Park truck safely as described in “Safe Parking.” Put blocks at front and rear of drive wheels. Carriage Outer Rail Tall Block Inner Rail Carriage Outer Rail Short Block Inner Rail

Group SA, Safe Maintenance SM 751 SA-2-5 2. Put a floor jack under the steer axle mounting frame member, centered between the two wheels. WARNING ! Never lift the truck by the counterweight. NOTE If there is insufficient clearance under frame for your jack, the truck may first be driven onto shims, such as 25 x 150 x 300 mm (1 x 6 x 12 in) pieces of board, to increase the truck frame underclearance. 3. Raise the truck only as high as necessary to perform the maintenance work. 4. Put blocks at both sides of the truck, fully under the frame main side structure. Put the blocks in front of but close to the counterweight and steer wheels for best truck stability. Put an equal amount of blocks under each side of the truck to provide a level working position. 5. Lower the truck onto the blocks and remove the jack. CAUTION ! Before performing any maintenance work, check the truck for stable condition on the blocking. 6. When maintenance work is completed, lower the rear of truck to the floor by reversing the above procedure and lowering each side of the truck 50 mm (2 in) at a time: • Put jack under frame and raise truck. • Carefully remove blocks and lower truck. • Remove jack and blocks from drive wheels. Raising Entire Truck Refer to truck data plate for truck weights. 1. Park truck safely as described in “Safe Parking.” Lower upright fully. 2. If necessary, drive truck onto boards to increase underclearance. WARNING ! SIDE-TO-SIDE TIPOVER. When jacking side of truck, be sure upright is lowered fully and do not raise one side of the truck more than about 50 mm (2 in) higher than the other, to avoid tipping truck over laterally. END-TO-END TIPOVER. If the upright and transaxle are removed while the truck is blocked up, the truck will tip backwards due to the heavy counterweight. Both upright and counterweight must be removed before attempting to raise the truck for transaxle removal. The back of the truck must be sup- ported by blocking under the steer axle to prevent movement. The reverse is also true. If the counterweight is removed while the truck is up on blocks, the weight of the upright and transaxle will cause the truck to tip on the front blocks and fall forward.

Clark C60/C70/C75/C80 Forklifts OEM Service & Repair Manual

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