GMC 1976 ZEO 6083 Maintenance Manual page 200

4- 1 6 REAR SUSPENSION
Figure 36-Removing Compressor Piston
6. Referring
to
Figure 35, loosen Allen Head set
screw which is at top of eccentric .
7. Remove eccentric from motor output shaft,
and remove piston assembly through air filter open-
ing as shown in Figure 35 .
ers.
8. Remove piston rings and piston ring expand-
INSTALLATION
1 . Install piston rings and piston ring expanders.
2. Place piston assembly in position with eccen-
tric on motor output shaft. The eccentric must be
positioned to contact the bearing on the motor.
3. Tighten Allen Head set screw on eccentric to
at least 5 ft. lbs. torque .
4. Install piston sleeve .
5. Install valve plate and gasket, and install pis-
ton dome and gasket .
6. Install four screws in piston dome .
7. Install air filter.
MOTOR REPLACEMENT
REMOVAL
1 . Remove air compressor from vehicle.
2. Remove four screws from piston dome .
Remove piston dome and its gasket . Remove valve
plate and its gasket .
3 . Remove piston sleeve .
4. Remove air filter .
5 . Rotate eccentric until it is at the bottom of its
stroke .
6. Referring to Figure 35, loosen Allen Head set
screw which is at top of eccentric.
7. Remove eccentric from motor output shaft,
and remove piston assembly through air filter open-
ing as shown in Figure 36.
8. Remove two nuts holding on fan blade guard
and remove the guard .
9. Loosen Allen Head set screw in fan hub, and
remove fan blades .
INSTALLATION
1 . Install fan blades and tighten Allen Head set
screw.
2. Install fan blade guard.
3. Place piston assembly in position with eccen-
tric on motor output shaft. The eccentric must be
positioned to contact the bearing on the motor.
4. Tighten Allen Head set screw, on eccentric to
at least 5 ft. lbs . torque .
5. Install piston sleeve .
6. Install valve plate and its gasket, and install
piston dome and its gasket .
7. Install four screws in piston dome .
8. Install air filter .
9. Install compressor in vehicle.
FAN REPLACEMENT
REMOVAL
1. Remove two nuts from fan guard and remove
guard.