Firebird V8-305 5.0L (1982)
Fig. 10 Girlock brake booster exploded view
Disassembly
1.
Remove pedal pushrod boot and silencer, check valve, vacuum switch and grommets, as equipped, and the front housing seal.
2.
Scribe matching marks between front and rear housing sections, then mount booster assembly in suitable holding fixture with rear housing facing
up, Fig. 7.
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. 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.
6.
Remove power piston group and return spring from front housing, Fig. 8.
7.
Remove master cylinder piston rod and reaction retainer from front of piston, then the silencer from the rear of the assembly, Fig. 9.
8.
Hold piston assembly at edges of divider and strike pedal pushrod against work surface to dislodge diaphragm retainer.
9.
Remove primary diaphragm and support plate, secondary power piston bearing and housing divider, and the secondary diaphragm and support
plate from piston, noting installation position of components, Fig. 10.
10.
Clean and inspect components as outlined in ``General Service,'' and replace as needed. Do not disassemble power piston. If service is required,
power piston is replaced as an assembly.
