Before adjusting, set a gap of 0.1-0.5 mm between the pusher and the master cylinder piston (see fig. 111). This gap, necessary for the complete disengagement of the clutch, adjust the limiter 14 of the clutch pedal travel. The gap is determined by the free play of the pedal, equal to 0.4-2 mm.
Adjust with nut 5 (see fig. 112) free play of the pusher of the working cylinder, equal to 4-5 mm. After adjustment, nut 5 is fixed with lock nut 6. The amount of pusher free play is controlled by a ruler or a special template.
After making the above adjustments, the free travel of the clutch pedal (before disengaging the clutch) should be 25-35 mm.
Before bleeding the clutch hydraulic drive, check the fluid level in the reservoir, add fluid if necessary. Put on the head of the fitting 9 (see fig. 112) working cylinder hose, the lower end of which is immersed in a vessel with a fluid used for hydraulic drive. Press the clutch pedal sharply 3-5 times at intervals of 2-3 s and, holding the pedal depressed, unscrew fitting 9 by 1/2-3/4 turn, press the pedal to force the fluid in the drive together with air through the hose into vessel. After the pedal reaches the extreme forward position and the flow of fluid through the hose stops, tighten the fitting until it stops.
Repeat the indicated operation until the air bubbles are completely released and, keeping the pedal depressed, screw the fitting to failure, remove the hose and put on the fitting cap.
When pumping, make sure that the fluid level in the tank is above the hole for the tube going to the master cylinder, and the end of the pumping hose is constantly immersed in fluid.
If, despite prolonged pumping, air bubbles come out of the hose, then check the reliability of the fastening of the connections, find out if there are any cracks or leaks on the tubes in the connections with the fittings. It is possible for air to enter through faulty O-rings in the master or slave cylinders.