Hummer H1 Service Manual page 751

11-32 Heating/Ventilation/Air Conditioning (HVAC)
COMPRESSOR CLUTCH CORE REPLACEMENT
Removal
1. Perform steps 1 through 4 of Clutch Rotor and/or Bearings
replacement procedure. Mark clutch core terminal location
on compressor.
2. Install puller pilot and puller crossbar with puller legs on
compressor (Figure 11-39).
3. Tighten forcing screw against the puller pilot to remove
the clutch core.
SCREW
PULLER
CROSSBAR
PULLER PILOT
Figure 11-39: Clutch Core
Installation
1. Place the clutch core on compressor with the terminal
positioned at the marked location (Figure 11-39).
2. Place the clutch core installer over the internal opening of
the clutch core housing and align installer with the
compressor.
3. Center the puller crossbar in the countersunk center hole
of the clutch core installer. Install the through-bolts and
washers through the crossbar slots, and thread them into
holding fixture. The thread of the through-bolts should
engage the full thickness of the holding fixture.
(Figure 11-40).
PULLER
SCREW
CROSSBAR
CLUTCH
CORE
INSTALLER
CLUTCH CORE
Figure 11-40: Clutch Core Installer
4. Turn the center forcing screw of the puller crossbar to
force the clutch core into the compressor. Be sure clutch
core and installer stay aligned during installation.
5.
NOTE: Stake size should be only one-half the area of the
punch tip and approximately 0.010-0.015 in. (0.25-0.38 mm)
deep.
PULLER LEG
6.
CLUTCH CORE
COMPRESSOR SHAFT SEAL REPLACEMENT
Removal
1.
2.
CAUTION: The handle must be hand-tightened securely. Do
not use a wrench or pliers.
NOTE: Thoroughly clean inside of compressor neck area sur-
rounding the shaft, the exposed portion of the seal, the retainer
HOLDING
ring groove and the shaft itself. Any dirt or foreign material
FIXTURE
getting into compressor may cause damage.
3.
______________________
When core is fully seated on the compressor, use a 1/8-in.
diameter drift punch and stake the front head at three
places, 120 degrees apart, to ensure clutch core remains in
positioning (Figure 11-41).
CLUTCH CORE
Figure 11-41: Drift Punch
Install rotor and bearing assembly and clutch plate and
hub assembly.
Remove clutch plate and hub assembly.
Using snapring pliers, remove the shaft seal retaining ring
(Figure 11-42).
RETAINING RING
Figure 11-42: Shaft Seal Retainer Ring
Fully engage the knurled tangs of seal remover/installer
into recessed portion of seal by turning handle clockwise.
Remove seal from the compressor with a rotary-pulling
motion. Discard seal (Figure 11-43).
®
DRIFT
PUNCH
STAKE IN FRONT
HEAD (3 LOCATIONS,
120 DEGREES APART)