GMC 1976 ZEO 6083 Maintenance Manual page 191

PRESSURE SWITCH REMOVAL
1 . Release pressure in air reservoir through
Schrader valve.
2 . Remove one screw at top of switch cover and
remove switch cover (figure 8) .
3 . Disconnect two electrical wires held by screws
inside switch body .
4. Disconnect air line elbow below switch and
remove switch assembly .
AIR COMPRESSOR REMOVAL
(BROWN, SINGLE PISTON)
1 . Release pressure in air reservoir through Schrader
valve.
2 . Remove air line from piston dome (figure 2) .
3 . Disconnect hose at back of compressor .
4. Disconnect electrical wire at overheat switch
in top of compressor body .
5. Remove four screws that secure compressor
frame to mounting bracket and remove compressor
from vehicle.
Figure 8-Pressure Switch Installed
REAR SUSPENSION
4- 7
AIR COMPRESSOR
(DANA, DOUBLE PISTON)
1 . Disconnect electrical wires at back of compres-
sor motor (figure 3) .
2. Release pressure in air reservoir through
Schrader valve .
3. Disconnect air lines at back of compressor and
at head of one piston .
4. Remove three bolts that secure compressor to
mounting bracket and remove compressor .
AIR RESERVOIR REMOVAL
(FIGURE 9)
1 . Disconnect pressure switch wiring . See PRES-
SURE SWITCH REMOVAL steps 2 and 3 .
2. Release pressure in air reservoir through
Schrader valve, or drain cock .
3 . Disconnect two air lines on same side of reser-
voir .
4. Remove two bolts and nuts from front air
reservoir bracket, then two nuts and bolts from rear
bracket and remove air reservoir.
5 . Disconnect pressure switch from reservoir.
Figure 9-Air Reservoir Installed