7.1.5. Check of operability of the regulator of pressure

Install the car on the elevator or a viewing ditch, clear the regulator of pressure and clear a cover of dirt.
Carefully remove a protective cover from pressure regulator, remove the remains of lubricant and clear connection the torsion piston.
Ask the assistant to press a brake pedal with effort of 686-784 N (70–80 kgfs) and at the same time watch the acting part of the piston of the regulator of pressure.
If the piston moves concerning the case of the regulator of pressure upon 0,5–0,9 mm, twisting at the same time the torsion lever, then the regulator of pressure is efficient. Press 2–3 times a pedal completely to be convinced of operability of the regulator of pressure.
If when pressing a pedal the piston remains motionless that indicates a piston prirzhavleniye to the case, then replace pressure regulator.
Having convinced of operability of the regulator of pressure and of lack of a leak of brake fluid between the piston and the case of the regulator of pressure, cover with a DT-1 lubricant layer an axis and the acting part of the piston, put 5–6 g of this lubricant in a rubber cover and establish a cover into place.