Air Conditioning Compressor; Minor Repair To The Compressor; Clutch Plate And Hub Assembly Replacement; Pulley And Bearing Assembly Replacement - Chevrolet 1988 Light Duty Truck Repair Manual

1B2-2 DA-6 AIR CONDITIONING COMPRESSOR

MINOR REPAIR TO THE COMPRESSOR

Illustrations show the com pressor removed from the ve­
hicle for easier viewing.
Remove only the parts that need servicing. Refer to fig­
ure 3 for part names and location.
CLUTCH PLATE AND HUB
ASSEMBLY REPLACEMENT
C lean
The com pressor assem bly with solvent and blow dry
with dry air.
+-► R em o ve or D isco n n ect (F ig u res 3, 4 and 5)
Tools Required:
J 33026 C om pressor Holding Fixture
J 33027 Clutch Hub Holding Tool
J 33022 6-Point 13 mm Socket
J 33013 Hub and Drive Plate Remover and
Installer.
• Clamp J 33026 in a vise and attach the com pressor
to the holding fixture with thum b screws (figure 4).
1. Shaft nut (1) using J 33022 (figure 4).
• Hold the clutch plate and hub assem bly (2)
steady using J 33027.
2. Clutch plate and hub assembly (2).
• Thread J 33013-A into the clutch plate and hub
assembly (2).
• Hold the body of J 33013-A with a wrench and
tighten the center screw into the remover body
(figure 5).
3. Shaft key (21).
• Retain shaft key (21) if usable.
\U ^ \ Inspect
• All parts and replace as necessary.
0
Install or C o n n ect (F ig u res 3, 6 and 7)
Tools Required:
J 33026 Com pressor Holding Fixture
J 33027 Clutch Hub Holding Tool
J 33022 6-Point 13 mm Socket
J 33013-B Hub and Drive Plate Remover and
Installer
1. Shaft key (1).
• Allow the shaft key (21) to extend 3.2 mm
(Vs-inch) out of the bottom of the hub keyway
(figure 6).
• The shaft key is curved slightly to give an
interference fit in the groove.
Im po rtant
• Do not drive or pound on the clutch hub or the
shaft (20). Internal damage to the com pressor
may result.
2. C lutch plate and hub assem bly (2) (figure 6).
• Make sure the contact surfaces of the clutch
plate (2) and the pulley (5) are clean.
• Remove the forcing screw tip from J 33013-B
and reverse the body direction on the center
screw.
• Install J 33013-B with bearing (figure 7).
• Back off J 33013-B body enough to allow the
center screw to be threaded against the end of
the com pressor shaft.
• Hold the center screw w ith a w rench and
tighten the hex portion of J 33013-B body
w hile pressing the hub onto the shaft. After
tig h ten in g the body several turns, remove
J 33013-B and check that the shaft key (21) is
properly in place in the keyway, then install the
clutch plate and hub assem bly (2) to its final
position.
• Measure the air gap between contact surfaces
of the clutch plate and hub assem bly (2) and
the pulley (5). The gap should be 0.38-0.64 mm
(0.015-0.025-inch) (figure 7).
• Remove J 33013-B.
1 ?
In sp ect
Position of the shaft (20) (even with or slightly
above the clutch hub).
Use J 33027 to hold the clutch plate and hub
assem bly (2).
T ig h te n
• S haft nut (1) to 16 N m
J 33022.
— Hand spin the pulley (5) to check for free
rotation.
• Remove J 33026.
PULLEY AND BEARING
ASSEMBLY REPLACEMENT
R em o ve or D isco n n ect (F ig u re s 3, 8, 9 10 and
11 )
Tools Required:
J 6983 Snap Ring Pliers
J 8092 Driver Handle
J 9398-A Pulley Bearing Remover
J 33020 Pulley Puller
J 33023-A Puller Pilot
1. C lutch plate and hub assem bly (2).
2. Pulley bearing retainer (3) using J 6083 (figure 8).
3. Pulley (5).
• Install J 33023-A to the front head (figure 9).
• Install J 33020 tangs into the inner circle of
slots in the pulley (5) contact surface. Rotate
J 33020 clockwise so the tangs will lock into
the segments between the slots (figure 10).
• Hold J 33020 in place and tighten the puller
screw against J 33023-A puller pilot to remove
the pulley (5) (figures 10 and 11).
4. Pulley bearing (4) from the pulley (5) using J 9398-A
and J 8092 (figure 11).
(12 ft. lbs.) w ith