- press the brake pedal with a force of 10-12 kgf to ensure that the shoes are pressed against the drum. Holding the shoes in this position, turn the hexagonal heads of the eccentrics 1 and 2 (Fig. 148) in the indicated direction until they touch the shoes;
- release the pedal and turn the adjusting eccentrics in the opposite direction by approximately 10°, thus setting the gap between the shoes and the drum. Then sharply press the brake pedal 3-4 times and with the pedal released, rotate the suspended wheels. In this case, the shoes should not touch the drums.
A test drive is used to check the brakes and the free travel of the brake pedal. After driving 5-6 km without using the brakes, stop and check by touch that the brake drums are not heating up due to friction between the pads. If the drums are very hot, indicating friction between the pads and the drum, repeat the adjustment.
If the adjustment fails to establish the required gap between the pads and the drum, remove the brake drum and check the condition of the pads and drum.
If necessary, replace or repair worn parts and, after assembly, re-adjust the gap between the pads and the drum.
(The text is taken from the online resource VazBook)