Pic. 124. Brake drive: 1 - vacuum amplifier; 2 - main cylinder; 3 - bracket for clutch and brake pedals; 4 - stoplight switch; 5 — nuts of fastening of the brake light switch; 6 - brake light switch buffer; 7 - brake pedal; 8 - pusher.
If the brake light switch is too close to the pedal, it will not return to its original position. Valve 9 (see fig. 117), pressing against the body 22, separates the cavities A and E and the wheels are not completely released when the pedal is released. If by moving the brake light switch it is not possible to eliminate the incomplete release of the brake mechanisms, then the master cylinder of the brake drive is disconnected from the vacuum booster and the protrusion of the adjusting bolt 28 relative to the plane of the master cylinder flange is checked (size 1.25-0,2 mm). This size is set by holding the end of the rod with a special key, and wrapping or unscrewing the bolt 28 with another key.