To check the operation of the amplifier, turn off the engine and depress the brake pedal several times to release the vacuum. Press the pedal and, keeping it depressed, start the engine. At idle speed, the brake pedal will slightly sink to the floor of the body, which indicates the normal operation of the amplifier.
Parts of the brake pedal, vacuum booster and master cylinder
1 - bracket; 2 - retraction spring; 3 - locknuts; 4 - stoplight switch; 5 - brake pedal; 6 - motor shield; 7 - pusher; 8 - partition; 9 - gasket; 10 - vacuum amplifier; 11 - sealing ring ("X"); 12 - master cylinder
Removing
1. To remove the vacuum booster, first remove the brake master cylinder (see Master brake cylinder).
2. Disconnect the vacuum hose by unscrewing the union nut.
3. Remove the bottom part of the panel of devices in salon.
4. Disconnect the booster pusher from the brake pedal lever by unscrewing the nut and removing the bolt (remove the circlip and remove the axle).
Installation
5. Installation is carried out in the reverse order of removal. In this case, a new sealing ring must be installed between the main cylinder and the amplifier.