Thrust And Belleville Washers Replacement; Shell And/Or Seal Replacement - Chevrolet 1988 Light Duty Truck Repair Manual

1B3-10 R-4 AIR CONDITIONING COMPRESSOR
THRUST AND BELLEVILLE
WASHERS REPLACEMENT
R em o ve or D is c o n n e c t (F ig u res 1 and 22)
1. Rotor (5) and bearing (
2
. Front head (15) and seal (17).
3. Two thrust washers (20) (figure 22).
4. Belleville washer (21).
— Note the position of the washers.
Install or C on n ect (F ig u res 1 and 22)
1
. One new thrust washer (20).
• Place the w asher over the shaft with the
washer tang pointing UP.
2. New Belleville washer (21).
• Place the high center of the washer UP.
3. One new thrust washer (20).
• Place the w asher over the shaft with the
washer tang pointing down.
Im p o rtan t
• Lubricate the washers with clean 525
viscosity refrigerant oil.
4. Front head (15) and seal (17).
22
Figure — Replacing the Thrust and Belleville
W ashers
6
) assembly.
5. Rotor (5) and bearing ( 6 ) assembly.
SHELL AND/OR SEAL
REPLACEMENT
R em o ve or D isco n n ect (F ig u re s 1, 23 and 24)
Tool Required:
J 25008-A
1. Clutch drive hub (3).
6
2. Rotor (5) and bearing ( ) assembly.
9
Im p o rta n t
• Do not loosen or remove the pulley rim
mounting screws to remove the clutch
rotor and bearing, clutch coil and pulley
rim.
3. Shell retainer strap (32) (figure 23).
• Pry the strap away from the cylin d e r and
position it high enough to clear the cylinder
when removing the shell.
4. Shell (18) (figure 24).
• Remove J 25008-A from the compressor.
• R e v e rs e J 2 5 0 0 8 -A w ith th e s te p b lo c k
protrusions engaging the shell.
• Install the m edium length metric threaded
mounting bolts through J 25008-A.
• Thread the bolts finger tight on both sides into
the com pressor cylinder until the step of the
J 25008-A protrusions contact the shell.
• Alternately tighten each bolt
the shell free of the seals (19) on the cylinder.
• If one screw requires more force to turn than
the other, im m ediately turn the other screw to
bring the screw threading sequence in-step or
the shell will be cocked and be difficult to
remove. Norm al rem oval does not require
much force on the wrench if the screws are
kept in-step while turning. The shell can be
removed by hand as soon as the shell is free
1 4
/ -turn to push