It is recommended to replace a faulty pressure regulator as an assembly.
You will need: a screwdriver with a flat blade, a key "on 8", "on 13", a socket wrench (head) "on 13", a special key "on 10" for unscrewing the nuts of the brake pipes.
1. Using a screwdriver, remove the lock washer of the elastic lever earring of the regulator drive and the flat washer installed underneath it.
2. Disconnect the elastic arm with the earring from the rear suspension beam.
3. To avoid having to adjust the pressure regulator drive during installation, mark the position of the drive lever relative to the bracket.
4. Place a container under the place where the tubes are connected to the regulator, as liquid will flow out from there, and use a special 10 mm wrench to unscrew the four nuts securing the brake tubes.
5. Disconnect the tubes from the regulator. Seal the tube openings, for example, with protective caps for the wheel cylinder bleeder valves. Mark the tubes to avoid confusion when installing the regulator later.
6. Using a 13 mm spanner, unscrew the front bolt securing the regulator to the bracket.
7. Using a 13 mm spanner, unscrew the rear regulator mounting bolt…
8. …and remove the regulator with the drive from the car.
This is what a pressure regulator looks like when removed from a car..
…and its drive.
9. If it is necessary to replace the drive parts, use a screwdriver to pry the earring bracket away from the elastic lever.
10. Remove the bracket together with the earring from the lever.
11. Using an 8 mm spanner, unscrew the lever retainer mounting bolt.
12. Remove the lever lock and disconnect the drive lever from the elastic lever.
The material was taken from a website LADAMAN.ru
13. When connecting the drive lever to the elastic lever, the locking fork must enter the groove on the elastic lever.
14. Install the regulator in the reverse order of removal. Please note that the front mounting bolt is longer than the rear one.
15. After installing the regulator, use pliers to tighten the earring bracket. Then bleed the brake system and, if necessary, adjust the pressure regulator drive (see "Adjusting the pressure regulator drive").