Compressor Oil Level Check; Isolating The Compressor; Vacuum Actuators - Ford COUGAR 1968 Shop Manual

1 6-30 GROUP 16
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Ventilating, Heating, And Accessories
COMPRESSOR OIL
LEVEL
CHECK
Under normal conditions, when
the air cooling system is operating
satisfactorily, the compressor oil lev-
el need not be checked. There is no
place for the oil to go except inside
the .sealed system. When the car is
first started, some of the oil will be
pumped into the rest of the system.
After 15 minutes of operation, most
of the oil is returned to the compres-
sor crankcase.
Check the compressor oil level only
if a portion of the,refrigerant system
is being replaced, or if there was a
leak in the system and the refrigerant
is being replaced.
Check the oil after the system has
been charged and has been operating
at idle speed for 10 minutes in 60
degrees F. surrounding air tempera-
ture or above. Turn off the engine,
and isolate the compressor. Remove
the oil filler plug from the compressor;
insert a flattened 118-inch diameter
rod (Fig. 15) in the oil filler hole
until it bottoms. The rod should
show at least the minimum .amount
of oil as shown in Figs. 16 and
17. It may be necessary to rotate the
compressor crankshaft slightly by
hand so that the dipstick will clear the
crankcase. If additional oil is needed
in the compressor, add Texaco
Capella E refrigerant compressor oil
or equivalent.
If more than the maximum amount
of oil is indicated, as might happen if
a new compressor is installed and oil
already in the system is pumped back
to the compressor, draw out the ex-
cess oil until the minimum quantity
is indicated.
Replace the oil filler plug,
evacuate and connect the compressor
7/8" MIN.
1 -3/16"
MAX.
I
back into the system. Operate the
system for an additional five minutes,
then recheck the oil level as above.
Two checks are necessary as one
check' will not return all the oil to the
compressor if there is too much oil
in the system.
Replace the oil filler plug, then
THIS
ENDIFOR
VERTICAL MWNT
CCMPRESSOR
NG.
16-York Compressor Oil Level Dipstick
-3/16 INCH
K2121-0
NG.
17-Tecumseh Com.pressor Oil Level Dipstick
,
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evacuate and connect the compressor
back into the system. Be sure to check
the compressor filler opening for
leaks.
ISOLATING THE COMPRESSOR
This procedure is used when check-
ing the compressor oil level and when
-it is desired to replace the compressor
without losing the refrigerant charge.
To isolate the compressor from the
system, turn both the high and the
low pressure service valves to the
extreme dockvdso position Loosen
the cap on the high pressure service
valve gauge port, and allow the gas to
escape until the compressor is re-
lieved of refrigerant pressure.
Loosen the cap a small amount
only, and do not remove it until the
pressure is completely relieved.
To connect the compressor back
into the system, evacuate the com-
pressor at both service valve gauge
ports, close the vacuum pump valve,
turn both service valves to the maxi-
mum counterclockwise position, and
cap the high pressure service valve
gauge port and service valve stems.
VACUUM ACTUATORS
The vacuum actuators are adjust-
able for proper air door operation.