Sinotruk SITRAK：1) Check and adjust the master cylinder push rod and piston clearance. Left 0.7-1mm gap between the push rod and the piston, this gap is to prevent the fuel tank into the oil compensation holes are blocked by the piston cup. Assembly, gently twist putting adjust the length until the top feeling to the piston and the plunger screw around back to Fasten nut. This gap should exceed 1mm, otherwise it would reduce the effective stroke of the master cylinder, affecting clutch disengagement.
2) Check and adjust the power cylinder push cylinder free travel. Clutch release bearings should be a 2mm-3mmm free trip to ensure prolonged pressure on the bearings do not work, causing early damage, this power cylinder push rod free travel should be 6mm-8mm. Assembly adjustments, first install the return spring, to rely booster cylinder pretightening spring pushes the piston and pusher, withstood the rocker clutch release, then adjust the stopper bolt, the bolt end bracket left between 6mm-8mm gap, tighten solid nut, then attach the return spring.
3) drained the air in the hydraulic system. Clutch hydraulic system memory will reduce the effective stroke of the air, the booster cylinder piston putter, the clutch is not complete, gear difficult.
4) in the assembly or disassembly tubing, first booster cylinder bleeder valve loosen the added oil storage tanks, side step on the clutch pedal side supplement oil until the oil outflow from the bleeder valve tightened. In order to achieve the purpose of not only fast but also completely drained of air in the system, to be used in sub-row sub. First exclude the tubing the preceding air, exhaust, clutch pedal 2-3 times fast foot in the end and hold loosen the master cylinder connecting tube nut, front air discharged from here, unscrew the pedal tight connection tube nut and then relax and repeat the above power 4 -6 times can be. Tubing middle tubing installation location, easy to accumulate air, can use the aforementioned intermediate bleed valve from the tubing drained. When the hydraulic piping oil full of basic, step on the clutch pedal, the power cylinder piston push rod has a slight action, start the engine cheer, turn off the engine after playing enough air pressure. Cheer role the the booster cylinder pressure booster role; to reduce pedal force. Similarly to the aforementioned method, drained tubing backend air bleed plug at the power cylinder.