Repair of the vacuum brake booster is not provided, therefore, if a malfunction occurs, it must be replaced.
Turn away nuts of fastening of the main brake cylinder on the vacuum amplifier of brakes. Disconnect the brake fluid level sensor connector and move the brake master cylinder to the side. Do not bend the brake pipes going to the main brake cylinder. If there is any doubt about the flexibility of the tubes, disconnect them from the brake master cylinder and plug the ends with plugs.
Pic. 10.20. Elements of fastening of the vacuum booster of brakes: 1 - pin with a head and a hole for a cotter pin; 2 - fork and nut; 3 - cotter pin; 4 - gasket; 5 - vacuum brake booster; 6 – a socket of the gauge of level of a brake liquid; 7 - the main brake cylinder; 8 – brake pipes; 9 - nut; 10 - vacuum hose; 11 - collar
Disconnect the vacuum hose from the front of the brake booster (pic. 10.20).
In the passenger compartment, remove the heater fan air duct from under the instrument panel and lower trim. Remove the cotter pin and pin with a head and a hole for the cotter pin, disconnect the pusher of the vacuum brake booster from the brake pedal. When detaching, do not tilt the pusher to the side.
Unscrew the four nuts securing the vacuum booster and carefully remove it from the engine compartment.
If a new brake booster is required, check the gap between the primary piston of the master cylinder and the booster pushrod.
At installation loosely screw on four nuts and connect a pusher to a brake pedal. Tighten the nuts and connect the vacuum hose. If the brake pipes of the hydraulic system have been disconnected, completely bleed the brake system to remove air that has entered it.
Check the installation height and free play of the brake pedal and adjust if necessary.