70
change the number of the adjusting shims 11 in order not to
disturb the adjustment of the safety valve.
Brake System
Maintenance of the Service Brakes
Periodically check the fluid level in the brake master cylinder
reservoirs and top up if required (Fig. 67). The level should be
15-20 mm below the filling hole upper edges. Make sure of the
hydraulic brake system tightness. Check the pipelines for
condition and reliable attachment to the frame and rear axle .
Do not operate the automobile when the pipes and hoses are
faulty.
Fig. 66. By-pass and è
Relief Valves of Pump:
1 -control valve of by-pass
valve ; 2 -relief valve spring;
3 -guide of relief valve spring;
4 -relief valve ball; 5 -control
valve spring ; 6 -relief valve
seat; 7 -filter; 8 -ring; 9 -plug-
stopper; 10 -sealing gasket;
11 -adjusting shims
Fig. 67. Master Cylinder Control Linkage:
1 -signalling device; 2 -brake hydraulic system emergency condition warning lamp
switch;3 -reservoirs; 4 -brake master cylinder body; 5,8 -nuts; 6 -vacuum booster;
7 -plate; 9 -brake pedal shaft; 10 -fork; 11 -pin; 12 -brake pedal; 13 -stop;
14 -stop-light switch; 15 -return spring; 16 -bracket
