Hummer H1 Service Manual page 748

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3. Keep the clutch plate and hub assembly from turning by
using the clutch hub holding tool. Remove the shaft nut
using nut socket.
4. With center screw forcing tip in place to thrust against the
end of the shaft, thread the hub and clutch drive plate
assembly remover/installer into the hub. Hold the body of
the remover with a wrench, and turn the center screw into
the remover body to remove the clutch plate and hub
assembly (Figure 11-27).
HUB AND CLUTCH DRIVE PLATE
ASSEMBLY REMOVER/INSTALLER
HOLDING FIXTURE
Figure 11-27: Clutch Plate and Hub Assembly
CAUTION: Do not drive or pound on the clutch hub or shaft.
Internal damage to compressor may result. The forcing tip on
remover/installer center screw must be flat, or the end of the
shaft/axial plate assembly will be damaged.
5. Remove the shaft key and retain for reassembly
(Figure 11-28).
CLUTCH PLATE
AND HUB ASSEMBLY
SHAFT KEYWAY
CLUTCH
PULLEY
ROTOR
Figure 11-28: Shaft Key
Installation
1. Install the shaft key into the hub key groove. Allow the key
to project approximately 1/8 in. (3.2 mm) out of the key-
way. The shaft key is curved slightly to provide an interfer-
ence fit in the hub key groove (Figure 11-28).
2. Be sure the frictional surface of the clutch plate and the
clutch pulley rotor are clean before installing the clutch
plate and hub assembly.
05745159
Heating/Ventilation/Air Conditioning (HVAC)
3.
4.
CLUTCH PLATE
AND HUB ASSEMBLY
5.
NOTE: The body of the remover/installer should be backed
off sufficiently to allow the center screw to be threaded onto
the end of the compressor shaft.
6.
SHAFT KEY
CAUTION: If the center screw is threaded fully onto the end of
the compressor shaft, or if the body of the installer is held and
the center screw is rotated, the key will wedge and will break
the clutch hub.
7.
8.
9.
10. Install compressor.
Align the shaft key with the shaft keyway, and place the
clutch plate and hub assembly onto the compressor shaft.
Remove the forcing tip on clutch plate and hub assembly
installer/remover center screw and reverse the body
direction on the center screw (Figure 11-29).
DRIVE PLATE
INSTALLER BEARING
CLUTCH PLATE
AND HUB ASSEMBLY
Figure 11-29: Drive Plate Installation
Install the clutch plate and hub assembly remover/
installer.
Hold the center screw with a wrench. Tighten the hex
portion of the remover/installer body to press the hub onto
the shaft. Tighten the body several turns, remove the
installer, and check to see that the shaft key is still in place
in the keyway before installing the clutch plate and hub
assembly to its final position. The air gap between
frictional surfaces of the clutch plate and clutch rotor
should be 0.020-0.030 in. (0.50-0.76 mm).
Remove the remover/installer and check for proper
positioning of the shaft key (even or slightly above the
clutch hub). Install the shaft nut. Hold the clutch plate and
hub assembly with clutch hub holding tool, and using nut
socket, tighten the nut against the compressor shaft
shoulder to 8-16 lb-ft (11-22 N•m) (Figure 11-26).
Spin the pulley rotor by hand to see that the rotor is not
rubbing the clutch drive plate (Figure 11-28).
Add PAG oil to the compressor in an equivelant amount to
the oil in the compressor when it was originally removed.
11-29
DRIVE PLATE
INSTALLER
CENTER
SCREW
AIR GAP
0.02 - 0.03 IN.
(0.50 - 0.76 MM)