Pressure Regulator Actuator Details: 1 - regulator drive lever (21013512122); 2 - lever axis (2101-3512116); 3 - pressure regulator (2101-3512010); 4 - lever lock plate (2101-3512117); 5 - protective cover (21013512118); 6 - drive lever rod (2101-3512132); 7 - polymer bushing of the lever strut (2101-3512136); 8 - spacer sleeve (2101-3512135); 9 - lever mounting bracket (2101-3512128); 10 - bushing of the drive lever (2101-3512125)
To carry out the work, you will need an assistant, as well as a special wrench for 10 mm for brake pipes, a transparent vinyl pipe of a suitable diameter, a container for draining brake fluid, fresh brake fluid (see "Operating fluids").
Examination
1. We install the car on a viewing hole or overpass (see "Vehicle preparation for maintenance and repair").
2. We clean the regulator and protective cover from dirt.
3. Remove the rubber protective cover from the regulator and remove the grease at the point of contact between the piston and the lever axis.
4. The assistant presses the brake pedal with a force of 70-80 kgf, at this moment we observe the movement of the protruding part of the regulator piston. If the displacement of the piston relative to the regulator body is 0.5-0.9 mm, then the regulator is in good condition. If the piston does not move when you press the pedal, replace the pressure regulator.
5. We make sure that there is no leakage of brake fluid between the regulator housing and the piston.
6. We apply waterproof grease to the end of the lever and the protruding part of the piston and put 5-6 g of the same grease in a rubber boot.
7. Install the cover on the pressure regulator.
Removing
For the convenience of performing work, we disconnect the right shock absorber from the rear axle bracket and take it to the side (see "Rear suspension shock absorber - replacement").
1. Using a 10 mm socket wrench, unscrew the nut of the bolt securing the pressure regulator drive lever to the rod, holding the bolt from turning with a wrench of the same size.
2. We remove the bushings from the hole in the eye of the lever.
3. With a 10 mm wrench, unscrew the two nuts of the bracket for attaching the lever to the body and remove the bracket.
4. Using a 13 mm socket wrench with an extension, unscrew the three nuts securing the regulator bracket to the body and two bolts securing the regulator to the bracket.
5. Remove the bracket.
6. Using a special 10 mm wrench for brake pipes, we unscrew the two fittings for attaching the pipes to the regulator and take them aside.
7. Remove the pressure regulator assembly with the drive lever.
8. Having shifted the protective cover, we unscrew the bolt securing the locking plate of the lever to the regulator body with an 8 mm key.
9. Disconnect the lever from the regulator and remove the lever axis from it.
Installation
1. Install the pressure regulator in reverse order.
2. Before tightening the regulator mounting bolts, set the distance А=140+5 mm from the end of the regulator lever to the horizontal platform of the body side member.
3. Remove the rubber protective cover from the regulator.
4. By changing the position of the regulator relative to the upper slot in the bracket, we achieve light contact between the lever and the regulator piston.
5. In this position, tighten the bolts securing the regulator to the bracket.
6. We apply plastic waterproof grease to the end of the lever and the protruding part of the piston and put 5-6 g of this grease in a rubber boot.
7. Install the cover on the pressure regulator.
8. We pump the hydraulic brakes (see "Hydraulic brakes - pumping and replacing brake fluid").