Contents: Removal 🠛 Installation 🠛
The pressure regulator distributes the working fluid of the brake system through the circuits (diagonals) and reduces the pressure in the hydraulic drive of the rear wheels to prevent them from locking during sudden braking. Special equipment is required to check the operation of the regulator, so if it is faulty, you should contact a specialist.
The pressure regulator is installed on the rear beam of the car. During braking, the rear beam, moving relative to the car, acts on the regulator mechanism through the rod, reducing the braking force on the rear wheels in a given proportion relative to the braking force on the front wheels.
Removal
- raise the rear of the car and place supports under the body;
- disconnect the negative battery cable;
- to reduce the loss of working fluid, clamp the hose from the expansion tank or seal the tank by placing a polyethylene gasket under its lid;
- take measures to prevent the working fluid from spreading by placing rags in the work area. Wipe down the pipes leading to the regulator;
Figure 7.8. Disconnecting the pressure regulator (highlighted) from the bracket on the rear suspension beam
- remove the regulator rod by removing the spring retainer installed on the rear suspension beam (Figure 7.8);
Figure 7.9. Disconnecting the brake lines from the pressure regulator housing
- disconnect the brake lines from the regulator, having marked their position beforehand (Figure 7.9). Seal the holes to prevent dirt from getting in;
Figure 7.10. Removing the heat-insulating shield
- remove the heat shield by removing one bolt and two quick release fasteners (Figure 7.10);
Figure 7.11. Fastening the pressure regulator: 1 – bracket bolt; the arrows show the fastening nuts
- loosen bolt 1 (Figure 7.11) and unscrew the two nuts of the regulator mounting bolts, shown by the arrows. Remove the regulator from the car.
Caution! Do not loosen the regulator rod clamp bolt: if the rod length changes, the regulator will need to be adjusted after replacement.
Installation
Installation is carried out in the reverse order of removal:
- connect the brake lines to the regulator, installing them according to the marks made during removal;
- remove the polyethylene gasket from under the expansion tank lid or remove the clamp from the hose;
- remove air from the hydraulic drive of the brake system.