Pressure Regulator Position Adjustment - Vaz 21213 Repair Manual

Fig. 6-4. Handbrake linkage:
1 - front cable; 2 - rear cable guide; 3 - front cable return spring; 4 - rear cable; 5 - locknut; 6 - adjusting nut; 7 - spacer
Ask an assistant to press the brake pedal with effort of 686-
784 N (70-80 kgf) and simultaneously observe the outcoming part
of the pressure regulator piston. If the piston moves by 0.5-0.9
mm in relation to the regulator housing, thus twisting the torsion
arm, the pressure regulator is efficient. Repeat the pedal
depressing 2-3 times to completely ensure the serviceability of
the pressure regulator.
If during pedal depressing the piston remains motionless, this
means that the piston became stuck to the housing due to corro-
sion, and pressure regulator renewal is required.
After ensuring the pressure regulator serviceability and no
brake liquid leaks between the piston and the pressure regulator
Fig. 6-5. Installation of the rear brake pressure regulator and adjustments:
1, 7 - regulator securing bolts; 2 - piston; 3 - thrust washer bracket; 4 - pressure regulator control arm; 5 - shaft; 6 - cap; 8 - tie rod; 9 - pressure regulator;X = 150 ± 5 mm
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housing, apply a thin layer of Ñí-1 on the shaft and the acting part
of the piston, fill 5-6 gr. of this greasing in the rubber boot and refit
the cover.

Pressure regulator position adjustment

The pressure regulator position adjustment is required if the
fastening bolts became loose. Raise the vehicle rear axle.
Disconnect arm 4 (fig. 6-5) from tie-rod 8 and fix on its end tool
67.7820.9519. Direct the core of the tool upwards until it will get
pressed against the car floor (fig. 6-6). This will be distance "X"
from the arm end to the body chassis arm (see fig. 6-5), equal to
(150±5) mm.