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18-30
1977 PONTIAC SERVICE MANUAL
"ING
5420 OPEN DURING
LOWSIDE
HIGHSIDE
ACCUMULATOR
HIS HIGH PRES
w
J 5 7 2 5 4 4
1
I)\
CLOSED & LlNE DISCONNECTED
DURING DISCHARGING
MANIFOLD
I , ' ,
GAUGESET
I
\
OPEN DURING EVACUATION
I '
,'
-ED
DURING CHARGING
MULTI-CAN DISPENSING U N I T
I
!
,\
n F c R F a S E
OF WEIGHT
INDICATES
~
R-12 CONTAINER
/
USING J 23390
OPENER-VALVE
FOR 12 LB. CAN
Fig. 1B-25 Charging the 1977 C.C.O.T. A/C System With Disposable Can or Refrigerant Drum
1
WARNING: NEVER REMOVE A GAGE
LlNE FROM ITS ADAPTER WHEN LlNE IS
CONNECTED TO A/C SYSTEM. ALWAYS
REMOVE THE LlNE ADAPTER FROM THE
SERVICE FITTING TO DISCONNECT A
LINE. DO NOT REMOVE CHARGING
HOSE AT GAGE SET WHILE ATTACHED
TO ACCUMULATOR. THIS WILL RESULT
I N COMPLETE DISCHARGE OF SYSTEM
DUE TO THE DEPRESSED SCHRADER
VALVE I N SERVICE LOW-SIDE FITTING.
7. Replace protective cap on Accumulator fitting and
remove jumper wire from thermostatic switch. Reconnect
thermostatic switch.
8. Leak check system with J 23400 Electronic Leak
Detector.
9. With system fully charged and leak-checked, continue
to operate system and test for proper system pressures as
outlined under PERFORMANCE DATE in C.C.O.T. A/C
SYSTEM DIAGNOSTIC PROCEDURE.
ACCUMULATOR ASSEMBLY
The accumulator assembly for the C.C.O.T. system has
a service replacement which includes two O-rings (for the
inlet and outlet connections). The desiccant within the shell
is NOT serviced separately
-
it is part of the sealed
accumulator assembly.
The accumulator assembly should ONLY be replaced
when:
1. A physical perforation to the accumulator is found,
resulting in a leak.
2. The expansion tube (orifice) screen is plugged.
3. The compressor inlet screen is plugged.
4. An evaporator fails because of inside-out (internal)
corrosion.
DO NOT REPLACE the accumulator assembly when:
1.
Merely a dent is found in the outer shell of the
accumulator.
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