Inside the amplifier there is a plastic valve body 22, the shank of which is sealed at the outlet with a seal 18. A buffer 21, a piston 5 with a pusher 14, a rubber valve 9, springs 16 and 17 with support cups 8 and 11 and an air filter 15 are placed in the valve body 22. the recess of the piston 5 enters the thrust plate 20, the other end of which rests against the belt of the diaphragm 23, which prevents it from falling out. This plate fixes the piston assembly with the pusher 14 and the valve 9 in the housing 22. The rod 3 of the master cylinder piston drive rests against the buffer 21. An adjusting bolt 28 is screwed into the end hole of the rod.
The rubber valve 9 is assembled on the pusher 14. The movable valve head, reinforced with a metal washer, is pressed by the spring 17 through the cup 8 to the rear end of the piston 5 (at full disengagement). The body 22 has a seat for the movable valve head. The fixed shoulder of the valve 9 is pressed by the spring 16 through the cup 10 to the inner wall of the valve body shank, creating a reliable seal.
In the amplifier housing, a plastic hose tip 29 is attached through a rubber flange 1, into which a valve 30 is mounted. It prevents the combustible mixture from entering the vacuum cavity A of the amplifier. When the system is disengaged and the brake pedal is in its original position, the pusher 14, together with the valve body 22 and the stem 3, are pressed by the spring 24 to the rearmost position - a gap is formed between the valve head 9 and the valve body seat, as the piston 5 presses the valve from the seat. The vacuum cavity A through channel B, the gap between the seat and the valve and further through channel C communicates with the atmospheric cavity E.
Removing
Attention! When removing the amplifier, the main cylinder of the hydraulic brake drive is not disconnected from the hydraulic system so that air does not enter it.
1. Disconnect the vacuum booster pusher from the pedal.
2. Unscrew the nuts securing the master cylinder to the amplifier, remove it from the studs and set it aside.
3. Disconnect the hose from the booster.
4. Remove the nuts securing the booster to the clutch and brake pedal bracket and remove the booster.
Installation
Install the vacuum booster in reverse order.