5 minute read
Every 1000 Hours or Once a Year
3.6.22. Check, adjust valve clearance
! CAUTION! Check and adjust only after the engine cools down below 60 °C.
• Dismantle air supply pipe leading to the turbocharger plus the valve covers.
• Rotate the motor in CW direction using the belt pulley.
• Rotate the motor slowly to move to the top dead centre of the cylinder No. 1 compression. In this position the rocker arms of both of the valves are loose. (E- exhaust valve, I-inlet valve).
E I 1
• The sequence of valves 1÷4 is from the fan pulley.
• Change the clearance of both of the valves of the 1st cylinder using feeler gauges. Loosen the securing nut and turn the adjusting screw with screwdriver to adjust the clearance.
NOTE:
Proper clearance will be adjusted when you feel resistance upon pulling the gauge between the valve and the rocker arm. Following the adjustment tighten the securing nut with the torque of 24 Nm (18 ft-lb). With the securing nut tightened check the clearance again.
• Reinstall valve covers, tighten with 24 Nm (18 ft-lb) torque. Install air supply piping.
Valve Gap:
Inlet valve (I) = 0,254 (0.01 in) Exhaust valve (E) = 0,508 (0.02 in)
• Check and adjust the clearance of other valves as per the Figure.
• Make a mark on the damper of torsional vibrations and turn the crankshaft by 360°. • Check and adjust the clearance of other valves as per the Figure.
3.6.23. How to check tightening pulley and belt of the engine
• With the engine running inspect visually any vibrations of the fan pulley.
• Stop the engine! • Confirm the stop of tensioner arm does NOT contact bump stop of the bush. Replace the belt if it makes a contact. When the arm stops continue to contact bump stop of the bush, replace the tensioner. Confirm the cap screw is tightened with 43 Nm (32 ft-lb) torque.
• Lift the belt tightening pulley using a lever with a square end of 10mm (3/8-inch) and remove the belt.
• Carry out visual inspection of the belt, track any damage made. Cracks across the belt width are not considered damage. When longitudinal cracks occur on the belt, or the belt has its edges frayed, or parts of the material are ripped out, then the belt must be replaced.
• With the belt removed, check to confirm the stop of the tensioner arm comes into contact with the bump stop of the bush. Unless so, replace the tensioner.
• Check the pulley (arm) does not deflects from the vertical axis. Maximal deflection allowed is 3 mm (0.12 inch). Inspect the tensioner pulley along with the arm to make sure there are no fissures over there.
• Check axial clearance of fan pulley. This clearance may not exceed 0,15 mm (0.006 in). • Reinstal the belt back.
3.6.24. Replace oil in gearboxes
Axle (Wheel) Gearboxes
• Place the roller onto a flat, firm surface so that the axle gearbox plugs are in the position according to Fig.
Clean the area around plugs. Put appropriate vessel under the drain plug 1. Unscrew both plugs and clean them and drain oil.
• After draining oil mount back the drain plug 1, replace damaged plug sealing. • Fill oil through the upper plug 2 until the level reaches the opening or until it starts flowing out - 3,3 l (0,87 gal
US). • Mount back the upper plugs 2, replace damaged plug sealings.
• Unscrew the plugs 1, 2 and let oil to flow out. After draining reinstall the drain plug back. Use filler plug 1 to refill the recommended oil - 3,5 l (0,92 gal US). • Check amount of oil through the inspection hole 2. Oil level must reach up to the bottom edge of the hole or flow out slightly. Reinstall plugs 1 and 2, replace any plug gaskets damaged.
Uncoupled Axle Gearbox – RH side
• Wipe the spots round the plugs. • Place an appropriate receptacle underneath the drain plug 3 and unscrew it.
2
1
3
! CAUTION! Change oil first after driving 100 engine hours. Change oil while oil is hot. Do NOT touch gearbox or its adjacent sections when these are hot. Observe fire precautions!
Avoid oil to leak into the ground.
Used oil is environmentally hazardous waste – Hand it over for disposal. 2 1
3.6.25. Inspect the damping system
• Check the condition of metal rubbers (cracks, fissures), cohesiveness of metal with rubber. Replace any damaged one. • Confirm the bolts and nuts are tightened properly.
Free axle damping system – LH side.
Free axle damping system – RH side.
Front metal rubbers of driver control stand.
Rear metal rubbers of driver control stand.
3.6.26. How to clean fuel tank
• Unscrew the drain plug and let fuel to flow out into a receptacle installed.
• Flush the tank with clean fuel. • Screw on the plug again. • When fouled to a greater extent, remove the accumulator and tank cap. Inspect and clean the tank’s inner area. Insert a new sealing strip Teflon-type, and screw on the cap again. Reinstall the accumulator.
NOTE
When aeration of engine fuel system occurs you must deaerate it under Section 3.6.34. Carry out cleaning when there is minimal fuel in the tank. With the tank used up, ca 45 l [12 US gal] of fuel will remain in the tank.
