GMC 1976 ZEO 6083 Maintenance Manual page 201

2. Loosen Allen Head set screw at center of fan
hub. Remove fan from motor shaft.
INSTALLATION
1 . Install fan on motor shaft, tighten Allen Head
set screw.
2. Install fan guard and install two nuts .
REMOVAL
1 . Remove one screw located above label on face
of belt guard and remove belt guard (figure 38).
2. Rotate the compressor by hand and gradually
work the belt off the two pulleys installed with
flanges toward the mounting bracket.
INSTALLATION
NOTE:
While installing the timing belt, time the
compressor as follows:
1 . Remove intake assembly . See "Intake Assem-
bly - Removal" later in this section.
2. Rotate the compressor pulleys to position one
piston and rod assembly at the top of its stroke and
the other piston and rod assembly at the bottom of
its stroke (figure 39).
3. Place the timing belt on the pulley with the
flange to the front and gradually work the belt onto
the other two pulleys (figure 40) .
4. Rotate the compressor by hand until the tim-
ing belt is completely onto the pulleys.
NOTE:
Following installation of belt, check tim-
ing of pistons (See figure 39).
5. Replace belt guard and secure with one screw.
Replace intake assembly (following section) .
COMPRESSOR OVERHAUL
The Brown compressor has a thermal overload
protector switch mounted in the top of the compres-
sor body . The switch is designed to turn the compres
sor off in the event that its temperature reaches a
level where the motor can be damaged . When the
temperature drops to a safe level the switch allows
the compressor to operate.
(DANA, DOUBLE PISTON FIGURE 37)
TIMING BELT
REAR SUSPENSION
4- 1 7
THERMAL OVERLOAD
PROTECTOR SWITCH (FIGURE 32)
INTAKE ASSEMBLY
REMOVAL
1 . Remove air intake tubes from intake assemlies
at back of housings (figure 41).
2. Remove two spring wire filter retainers .
3. Remove intake assemblies with "O" rings. The
air filter is in the assembly .
4. Pinch the air filter between the thumb and
forefinger and remove it from behind the retaining
ring still in place. Replace the filter or clean with
soap and water and squeeze dry. Install the air filter
through the retaining ring and work into place with
light finger pressure (figure 42).
INSTALLATION
1 . Install air intake assemblies and "O" rings.
2. Install two spring wire filter retainers.
3. Install air intake tubes to intake assemblies at
back of housings .
MOTOR ASSEMBLY
REMOVAL
1 . Remove belt guard and timing belt .
2. Loosen two headless set screws in pulley and
slide pulley off motor shaft.