Clutch Plate And Hub Assembly Replacement - Chevrolet 1991 Light Duty Truck Repair Manual

1B3-8 R-4 AIR CONDITIONING COMPRESSOR
the staking pin location. A heavy duty rubber band
may be used to hold the stake pin in the guide,
and the stake pin should be properly positioned in
the guide after each impact of the pin.
Using care to prevent personal injury, strike the
4.
staking pin with a hammer until a metal stake,
similar to the original, is formed down to, but not
touching, the bearing. Stake three places 120°
apart.
NOTICE: The stake metal should not contact
the outer race of the bearing to prevent the
possibility of distorting the outer race.
5. With the compressor mounted to the J 25008-A
Holding Fixture, position the Rotor and Bearing
Assembly on the front head. Using Rotor and
Bearing Installer J 26271-A and Universal Handle
J 29886 drive the rotor and bearing assembly onto
the front head. With J 26271-A attached to J 29886
the force will be applied to the inner race of the
bearing when installing the assembly onto the front
head of the compressor (figure 19).
6. Retainer ring (4) with J 6083.
7. Clutch plate and hub assembly (3).
CLUTCH COIL AND/OR
PULLEY RIM REPLACEMENT
(V-GROOVE TYPE)
1**1 Remove or Disconnect (Figure 3)
Tool Required:
J 25008-A Compressor Holding Fixture
J 25031 Rotor and Bearing Puller
1. Perform steps 1 through 4 of "Clutch Rotor and
Bearing Replacement" but do not loosen or
remove the pulley rim mounting screws until the
clutch rotor, coil and pulley rim assembly have
been removed from the front head. Be careful not
to drop the Puller Guide J 25031 when removing
the assembly.
Rotor and Bearing Assembly
2. Pulley rim mounting screws and discard.
3. Slide the pulley rim off the rotor and hub assem­
bly. The pulley rim and clutch coil are replaceable
at this point.
E
Install or Connect (Figures 3 and 20)
Tool Required:
J 26271-A Rotor and Bearing Installer
1. Clutch coil, pulley rim, clutch rotor and bearing
assembly (figure 20).
m Important
• Use new screws and apply Loctite 601 or
equivalent to the screw threads, but do not
tighten.
2. Place the assembly on the neck of the front head
and seat into place using J 26271-A.
• Before fully seating the assembly, place the
clutch coil terminals in relation to the compres­
sor. Align the three protrusions on the rear of
the clutch coil with the locator holes in the front
head.
3. Rotor and bearing retainer ring (4) and reassemble
the clutch plate and hub assembly as described in

"Clutch Plate and Hub Assembly Replacement."

4. Rotate the pulley rim (8) and rotor (5) to be sure
the pulley rim (8) is rotating "in-line" and adjust as
required.
L*
Inspect
Clutch plate to clutch rotor gap is 0.5 to 1.0
mm (0.020 to 0.040-inches).
• Pulley rim mounting screws (10) to 11 N m (100
in. lbs.).
5. Bend the lock washers (9) to secure the screws
10
( ).
CLUTCH COIL AND/OR
PULLEY RIM REPLACEMENT
(POLY-GROOVE TYPE)
E3
Remove or Disconnect (Figures 3 and 21)
Tools Required:
J 25008-A Compressor Holding Fixture
J 25287 Clutch Coil Puller
J 25031 Rotor and Bearing Puller Guide
1. Clutch plate and hub assembly (3).
2. Rotor (5) and bearing (6) assembly.
• Mark the location of the clutch coil terminals on
the compressor.
3. Install Rotor and Bearing Puller Guide J 25031 to
the front head and install J 25287 and remove the
clutch coil from the front head (figure 21).