By visual inspection, make sure that the pressure regulator and its drive parts are not damaged, there is no leakage of brake fluid, plug 24 (see fig. 6-22) recessed into the body hole by 1-2 mm, there is no play in the connection of the rod 5 (see fig. 6-5) with an elastic lever 6 and an axis of the regulator drive lever 9.
Pic. 6-5. Installation diagram of the rear brake pressure regulator and its adjustment:
1 - adjusting bolt;
2 - pressure regulator drive lever;
3 - lever of the pressure regulator drive piston;
4 - pressure regulator;
5 - thrust;
6 - pressure regulator lever;
7 - a bolt of fastening of a regulator;
8 - support sleeve bracket.
Have an assistant depress the brake pedal. Piston 2 (see fig. 6-22) at the same time, it should move out of the housing by 1.6-2.4 mm, compressing the spring 5 (see fig. 6-6).
Pic. 6-6. Installing the adjustment tool for the rear brake pressure regulator actuator:
1 - locknut;
2 - pressure regulator drive lever;
3 - lever of the pressure regulator drive piston;
4 - pressure regulator drive lever;
5 - spring;
6 - adjusting bolt;
7 - fixture rod;
8 - bottom of the body;
h \u003d 200 + 5 mm - the distance between the bottom and the lever.
Non-compliance with the listed requirements, lack of piston stroke, as well as its insufficient or excessive stroke indicates a malfunction of the regulator or its drive. In this case, repair or replace the pressure regulator, and after installing it, adjust its actuator.