Examination
Press the brake pedal 5-6 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. With the brake pedal stopped in the middle of its travel, start the engine. With a working vacuum booster, the brake pedal should go forward after starting the engine. If the pedal does not move forward, check the attachment of the hose tip, the condition and fastening of the tip flange in the amplifier, the condition of the hose and fittings
Withdrawal
Remove the master brake cylinder. Remove the vacuum hose from the valve on the vacuum brake booster. Slide the front seats all the way back. Separate the floor covering from the bulkhead of the engine compartment to access the brake booster mounting nuts. Loosen nuts. Remove the 4 nuts securing the brake booster to the bracket.
Remove the brake booster from the bracket legs and rotate the bracket to the side. Remove the pin with the head and hole for the cotter pin to release the drive lever from the shaft. Remove the vacuum booster from the engine compartment. The vacuum amplifier is not repaired, i.e. it needs to be replaced in its entirety.
Installation
Installation is made in sequence, return to removal.
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