1A-6
1967
PONTIAC
SERVICE
MANUAL
3. Connect center flexible line of
gauge
set to
fitting on a can opener valve.
NOTE:
If line at center gauge
fitting
has not been
purged of air, loosen line at center
fitting
on gauge
set and "crack"
valve
at can opener (for a second
or two) to force air from the line.
Re
tight
en line at
center
fitting.
4. Open valve on No
0
3 Multi-opener (or on single
can)
and also low pressure and high pressure valves
on manifold
gauge
set.
Leave
can valve open
until
all
refrigerant
has entered the refrigeration system.
Close
valve on can.
a.
If the system is charged using single cans
and
the J 6271 valve, disconnect valve from can,
leaving valve closed to flexible line to the center
fitting of the manifold
gauge
set.
Install
valve on
a
new and
full
disposable can of Refrigerant-12,
and
repeat
until
four and one quarter one pound
cans of refrigerant have been used to charge
system.
Actual
net weight of refrigerant is 15 ozs. per
can,
therefore it
will
be necessary to use four and
one-third
cans for Pontiac or Tempest, four cans
for Firebird.
b.
If system is charged using the 3 can
Multi-
opener, J 6272, close the valve of opener after all
cans are empty. Release the locking lever and dis-
card
the three empty cans. If this tool
will
be
used to complete the charge with additional cans
to bring the required refrigerant charge, then
leave two of the cans emptied in position, locate
the one
full
can and lock the lever into place.
(These
empty cans balance the assembly and pre-
vent the loss of refrigerant out the open "series*'
passage.)
NOTE:
Align the pierced hole in the
empty
can
with
the punch in the cover of the
tool.
If
the J 6271
Fitz-All
valve for single cans is
available,
complete charging as explained in 4a
above.
5. Close valves on manifold
gauge
set.
6. Operate engine at 2000 rpm with temperature
control
knob at
full
cold position and blower control
for
high speed in
A/C
mode.
NOTE:
If air inlet
temperature
at the condenser
is
below
70°F.
when this check is
made,
bubbles
may
appear
even though the proper amount of re-
frigerant is in the
system.
Air inlet
temperature
must be
70°F.
or
above
to
make
an accurate check.
7. When refrigerant has been installed, continue to
operate system and
test
for proper operation as out-
lined
under
OPERATIONAL
TEST.
8. When satisfied that air conditioning system is
operating properly,
stop
engine, remove
gauge
set
and
replace protective caps on suction and discharge
fittings.
NOTE:
A considerable amount of refrigerant will
collect in the high pressure line, since some of
this refrigerant will have condensed into liquid
refrigerant. Wrap the high pressure
fitting
at the
compressor
with
a shop cloth before disconnecting
the Schrader
valve
from the gauge
fitting
to pre-
vent
damage
or injury to personnel.
9. Using leak detector J 6084, check complete
system for leaks as explained under
LEAK
DETECTORS.
SERVICE
STATION METHOD
INSTALLING
J 8393
1. Be certain compressor hand shut-off valves
are
closed to
gauge
fittings (counterclockwise).
2.
Be certain all valves on charging station are
closed.
3.
Connect high pressure
gauge
line (with J 6163
attached) to compressor high pressure
gauge
fitting.
4.
Turn
high pressure hand shut-off valve one
turn
clockwise,
and high pressure control (2) one
turn
counterclockwise (open).
Crack
open low pressure
control
(1) and allow refrigerant gas to hiss from low
pressure
gauge
line for three seconds, then connect
low pressure
gauge
line to low pressure
gauge
fitting
on
P.O.A.
valve. (Place J 6163 adapter on hose, then
attach
adapter to
gauge
fitting.)
FILLING
CHARGING
CYLINDER
1. Open control valve on refrigerant container.
2.
Open valve on bottom of charging cylinder al-
lowing refrigerant to enter cylinder.
3.
Bleed charging cylinder to valve (behind con-
trol
panel) only as required to allow refrigerant to
enter cylinder. When refrigerant reaches desired
charge level (4 1/8 or 3 3/4), close valve at bottom
of charging cylinder and be certain cylinder bleed
valve is closed securely.
NOTE:
While filling the cylinder, it will be nec-
essary
to close the
bleed
valve
periodically to
allow
boiling to subside so
that
refrigerant level in
the charging cylinder can be accurately
read.
CHARGING
THE
SYSTEM
USING
J
8393
1.
With
charging station installed as previously
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