Removing and installing the brake pressure regulator Lada Priora
One of the reasons for skidding or pulling the car to the side when braking may be a faulty pressure regulator.
It is recommended to replace a faulty pressure regulator as an assembly.
You will need: a flat-blade screwdriver, an 8 mm, a 13 mm wrench, a 13 mm socket wrench (head), and a special 10 mm wrench for unscrewing the brake pipe nuts.
Using a screwdriver, remove the lock washer of the elastic lever earring of the regulator drive and the flat washer installed underneath it.
Disconnect the elastic lever with the earring from the rear suspension beam.
To avoid having to adjust the pressure regulator drive during installation, mark the position of the drive lever relative to the bracket.
Place a container under the junction of the tubes with the regulator, as fluid will flow out from there, and use a special "10" wrench to unscrew the four nuts securing the brake tubes.
Disconnect the tubes from the regulator.
Seal the tube holes, for example, with protective caps for the wheel cylinder bleeder valves.
Mark the tubes so as not to mix them up when installing the regulator later.
Use a 13 mm wrench to remove the front bolt securing the regulator to the bracket
Using a 13 mm wrench, remove the rear regulator mounting bolt
Remove the regulator with the drive from the car
If it is necessary to replace the drive parts, use a screwdriver to pry the shackle bracket away from the elastic lever
Remove the bracket and shackle from the lever.
Using an 8 mm spanner, unscrew the lever retainer mounting bolt.
Remove the lever lock and disconnect the drive lever from the elastic lever
When connecting the drive lever to the elastic lever, the lock fork must enter the groove on the elastic lever
Install the regulator in in the reverse order of removal.
Note that the front mounting bolt is longer than the rear one.
After installing the regulator, use pliers to crimp the shackle clamp.
Then bleed the brake system and adjust the pressure regulator drive if necessary.
Adjusting the pressure regulator drive
Incorrect adjustment of the pressure regulator drive may cause skidding or pulling the car to the side when braking, reducing braking efficiency.
You will need: a 13 mm spanner, wire with a diameter of 2.0–2.1 mm.
Place the car on an inspection pit and press the rear of the car several times with a force of about 40–50 kgf to set the rear suspension to the middle position.
Loosen the front bolt securing the regulator to the bracket.
Using a wire as a feeler gauge, adjust the bracket so that the gap between the drive lever and the lever spring is 2.0–2.1 mm.
To do this, move the drive lever by the lug.
Tighten the bolt in this position.
If the pressure regulator is adjusted correctly, when braking from a speed of about 40 km/h on a horizontal section of the road with a hard surface, the front wheels should lock slightly before the rear wheels (this can be determined by an observer outside the car).
Otherwise, increase the gap (if the rear wheels lock before the front ones) or decrease (if the rear wheels lock much later than the front ones).
After this, check the braking adjustment again and repeat it if necessary.
