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 condition of the attachment flange of the tip in the amplifier, the condition of the hose and fitting.
Removing
Elements of the vacuum brake booster
1 - the main brake cylinder; 2 - gasket; 3 - vacuum hose; 4 - gasket; 5 - pin; 6 - fork; 7 - fastening bracket; 8 - vacuum brake booster
1. Remove the master brake cylinder.
2. On 1992 and 1993 models, remove the harness clamp from the bottom of the brake booster.
3. Loosen the fastener and move the charcoal canister down.
4. Disconnect the vacuum hose from the vacuum brake booster.
5. Remove the steering column cover from inside the vehicle.
6. Disconnect the brake booster pushrod from the top of the brake pedal.
7. Unscrew the 4 fastening nuts and remove the vacuum brake booster from the engine compartment.
Installation
1. Installation is made in sequence, return to removal.
2. When installing a new vacuum booster, it is necessary to check and, if necessary, adjust the gap between the piston of the main brake cylinder and the pusher of the brake booster.
3. To adjust, screw the adjusting screw into the pusher of the brake booster.
4. After installing the brake master cylinder, check the brake pedal height and free play.