The regulator valve is located on the side of the body and is connected to the rear axle by means of a spring.
This valve performs two functions:
- Distributes brake fluid diagonally between the front and rear wheels;
- Reduces braking pressure on the rear wheels during sudden braking of the vehicle.
The valve assembly and disassembly are simple operations, however, due to the disconnection of the spring mounting screw on the regulator, it is necessary to re-adjust it. To simplify the solution to this problem, you can use a scriber to mark the position of the spring anchor roller on the lever and install a new regulator again in the same position. It is necessary to pay attention to which channels the individual fittings are connected. After installing the valve, it is necessary to bleed air from the brake system.
The brake pressure regulator can be operated as follows.
Place the rear of the vehicle on sturdy jack stands.
Lie down under the car and inspect the brake pressure regulator on the rear axle.
The original text is available on the portal [vwmanual.ru]
Your assistant should press the brake pedal all the way down and then quickly release it.
When you press and release the brake pedal, you should see the brake pressure regulator lever move. Repeat the test several times.
The above test only shows that the brake pressure regulator is working, but it does not tell you anything about how the pressure distribution actually occurs. This can only be checked in a workshop using two pressure gauges.
We can give you one more little piece of advice. If the pressure on the rear axle is too high, you need to reduce the spring tension; if the pressure on the rear axle is too low, then you need to increase the spring tension to increase the pressure on the axle.
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