Pressure Relief Valve Replacement; Compressor Disassembly- Internal Cylinder And S H A - Chevrolet 1988 Light Duty Truck Repair Manual

1B5-10 HR-6 AIR CONDITIONING COMPRESSOR
32. H igh Pressure R elief Valve
Figure 26— HR-6 Com pressor Rear Head Detail
• Bottom the shaft lip seal into the com pressor
neck area using J 23128-A.
• Release and remove J 23128-A.
3. Shaft seal retainer ring using J 5403 (figure 22).
• Install flat side of shaft seal retainer ring
against the lip seal.
• Remove J 34614.
Im p o rta n t
• Leak test the compressor.
• Refer to " Leak Testing." .
jjjl
Clean
• Shaft (20) and inside the com pressor neck
area.
4. Clutch plate and hub assem bly (2).
PRESSURE RELIEF VALVE
REPLACEMENT
R em ove or D is c o n n e c t (F ig u res 4 and 26)
• Be sure the com pressor has no charge.
1. Pressure relief valve (32).
2. O-ring seal (33).
-►+ Install or C o n n e c t (F ig u re s 4 and 26)
• Lubricate the threads of the pressure relief valve
(32) and new seal with 525 viscosity refrigerant oil.
1. Pressure relief valve (32) with new seal.
T ig h te n
• Pressure relief valve (32) to 9 N m (84 in. lbs.).
Im p o rta n t
• Leak test the compressor.
• Refer to " Leak Testing."
B-06626
COMPRESSOR DISASSEMBLY
—INTERNAL CYLINDER AND
+ + R em o ve or D isco n n ect (F ig u re s 4, 27, 28, 29
and 30)
• Mark the front head (11) alignm ent with cylinders
(16) (23) and rear head (28) alignm ent.
1. Clutch plate and hub assem bly (2).
2. Pulley (5).
3. Clutch coil assembly (6).
4. Shaft seal parts (8).
• Note the com pressor alignm ent marks and
use them as a reference for com pressor
assem bly (figure 27).
5. Through bolts (7) and gaskets (figure 28).
• H and-support the com pressor from below.
• Remove com pressor assembly from J 33026.
6. Rear head (28) (figure 29).
• Using a wood block, tap around the edge of
the rear head (28) to ease removal.
• Mount the com pressor on J 33026 front head
(11) down (figure 30).
7. Head gasket (27).
Figure 28 — Installing the Through Bolts
SHAFT
in the Front Head