Century V6-173 2.8L VIN W FI (1987)
Vacuum Brake Booster: Service and Repair
Delco-Moraine Tandem Diaphragm Type
Disassembly
1. Remove pedal pushrod boot and silencer, check valve, vacuum switch and grommets, as equipped, and the front housing seal.
Fig. 7 Typical brake booster holding & support fixture installation. Delco-Moraine units
2. Scribe matching marks between front and rear housing sections, then mount booster assembly in suitable holding fixture with rear housing facing
up.
3. Apply pressure to housing with holding fixture forcing screw and rotate rear housing counterclockwise to unlock housing halves.
4. Slowly release spring tension, then remove booster assembly from holding fixture.
WARNING:Do not allow spring tension to release suddenly, as damage or personal injury may result.
5. Lift off rear housing, then remove primary power piston bearing from housing.
Fig. 8 Delco-Moraine tandem diaphragm booster exploded view
