Examination
1. Press the brake pedal several times with the engine off to create the same pressure in the cavities of the vacuum booster, close to atmospheric. At the same time, by the force applied to the pedal, determine if the valve body is sticking. Stop the brake pedal in the middle of its travel and start the engine. With a working vacuum booster, the brake pedal should move forward after starting the engine. If the pedal does not move forward, check the attachment of the hose tip, the connection of the tip flange mounting in the amplifier, the condition of the hose and fitting. On vehicles with diesel engines, check the operation of the vacuum pump.
Removing
Attention! When installing the vacuum brake booster, new fastening nuts must be used.
1. Remove the master brake cylinder.
2. Unscrew the connecting nut and disconnect the vacuum hose from the vacuum brake booster.
3. Remove the trim on the bottom of the instrument panel on the driver's side.
4. Remove the spring clip and remove the pin that secures the brake pedal to the pushrod of the brake booster.
5. In the car, unscrew the four fastening nuts and remove the vacuum brake booster from the engine compartment.
Installation
1. Before installing the vacuum brake booster, check the condition of the gasket on the back of the vacuum booster. If the gasket is damaged, replace it.
2. Install the vacuum brake booster to the bulkhead of the engine compartment.
3. While working inside the vehicle, check that the tip of the push rod of the brake booster is aligned with the hole in the brake pedal. Screw in four nuts of fastening of the vacuum amplifier of brakes and tighten them the demanded moment.
4. Lubricate the pin of the tip of the brake booster to the brake pedal, insert it into place and secure with the mounting bracket.
5. Install the lower instrument panel trim on the driver's side.
6. Connect the vacuum hose to the vacuum brake booster and secure with the connecting nut, tightening it to the required torque.
7. Install the brake master cylinder. Start the engine and check the tightness of the vacuum brake booster and hoses.