Load Compensator: Testing and Inspection

Brake pressure regulator, checking and adjusting

Special tools, testers and auxiliary items required





^ Brake pressure gauge 0-250 bar V.A.G 1310 A





The brake pressure regulator is fastened to a retainer placed on the mounting bracket for the rear axle and is controlled via a spring from the rear axle.

Function check
Press down the brake pedal firmly and release quickly (vehicle is standing on the wheels). The lever of the brake pressure regulator should move.

Pressure check and adjustment
The brake pressure regulator is adjusted when the vehicle is at its unloaded weight.

Unloaded weight means: The weight of the vehicle when it is ready for operation, which means:
^ A driver of 75 kg.
^ The fuel tank must be filled completely.
^ The spare wheel, vehicle tool kit and the vehicle jack are at the corresponding installation locations in the vehicle.
^ The water tank for the window/headlight washer system must be filled completely.

- Raise vehicle and connect pressure regulator at the brake caliper (left front wheel) and at the brake wheel cylinder/brake caliper (right rear wheel).
- Bleed both pressure regulators.
- Let vehicle down and tilt the car at the rear axle several times.
- Press brake pedal and measure pressures.
- Compare measured pressure values with the adjustment values, adjust if necessary.

Adjustment values of the load-dependent brake pressure regulator





Adjusting the brake pressure gauge
Test pressure at rear axle too high:
- Relieve pressure on regulator spring.

Test pressure at rear axle too low:
- Tension regulator spring.

Do not adjust when brake pedal is depressed, therefore observe the following repair sequence:

Read values:
- Release pedal.
- Adjust spring.

Press pedal again:
- Read values and adjust if necessary.
- Remove pressure gauge, bleed brake system.