Pontiac Fiero 1988 Service Manual page 101

18 HR-6 AIR C O N D I T I O N I N G C O M P R E S S O R
1— 12 O'CLOCK
REFERENCE
POSITION
2 - SUCTION
REED TIPS
MUST
COVER A L L
(3) V A L V E
PLATE
PORTS
520048-1P2
Fig. 46 Suction Reed Plate Properly Installed
1- 12 O'CLOCK
R E F . POSITION
2— DISCHARGE
CROSSOVER FRONT
TO REAR
3 - COMPRESSOR SHAFT
4 - O I L H O L E FOR SHAFT
LUBRICATION
520049-1D2
13-
14.
15.
16.
17.
18.
Fig. 47 Rear View and Detail of HR-6 Cylinder
and Shaft Assembly
Line up
mark
on front head (step 4 of Remove) w i t h
the alignment marks on the compressor cylinder and
assemble head over guide pins.
Using both hands, press down on the front head to
force it over the O-ring at the front of the cylinder.
Add new through bolt gaskets to the through bolts and
install the bolts into the compressor assembly ( Fig.
31 )• Be sure four ( 4 ) of the through bolts thread into
the rear head before removing the guide pins.
Alternately tighten the through bolts in progressive
torque until a torque of 8-10 N - m (72-84 in. lbs.) is
achieved on all six ( 6 ) bolts.
Install new shaft seal kit per previous procedure.
Add amount of new 525 viscosity refrigerant oil as
determined in step 1 of remove. Install test plate
J-9625-A. Place shaft nut on shaft and rotate
compressor shaft several times.
Leak test complete compressor assembly according to
(Bench-Check) Leak Testing procedure.
1- 12 O'CLOCK
R E F E R E N C E
POSITION
2 - 0-RING IN
PLACE ON
REAR OF
CYLINDER
3 - DISCHARGE
CROSSOVER
FRONT TO
REAR
4 - SHAFT
KEYWAY
5 - O I L H O L E
FOR SHAFT
LUBRICATION
520050-1P2
Fig. 48 Front View and Detail of HR-6 Cylinder
and Shaft Assembly
1—1/4" DIAMETER 2—CYLINDER CENTER
ALIGNEMENT ROD O-RING
on
Fig. 49 Cylinder Alignment Rod T h r o u g h
Cylinder Halves
19- Remove shaft nut and install clutch parts
compressor according to previous procedure.
20. Install compressor assembly on car.
21. Evacuate and charge the refrigerant system.
C O M P R E S S O R C E N T E R C Y L I N D E R S E A L
The center cylinder O-ring seal between the cylinder
halves is the same O-ring as is used for the seal between the
cylinder ends and the front and rear heads.
Should a leak occur at the center cylinder location, the
two ( 2 ) cylinder halves of the cylinder and shaft assembly
may be separated sufficiently to replace the O-ring
(approximately 1/2 - 5 / 8 " ) .
1. Disassemble the compressor per previous procedure
for Cylinder and Shaft Assembly replacement and
remove all parts assembled to the Cylinder and Shaft
Assembly.
2. Using a w o o d or plastic block and plastic headed
hammer, tap around the rear cylinder to separate the