CUSTOM
AIR
CONDITIONING
1A-9
Neglect
any fluid oil coating
loss
in
case
of
line
change
9
3
0
If the oil quantity drained from the compressor
is
less
than 4 ozs., replace into the compressor 6
fluid
ozs. of clean oil, plus the amount shown
above
for the respective component replacements.
4. Replace compressor and system components.
5. Evacuate, charge and perform operational
test.
REMOVING
AND
INSTALLING
COMPRESSOR
The
compressor, when removed, must be closed
immediately. If the system has
been
or can be
operated for more than two minutes, circulation of
oil
from compressor to other
components
of system
will
require adjustment of the oil charge in the new
compressor as explained above, under
REPLACING
COMPONENTS
OTHER
THAN
COMPRESSOR.
After
draining and measuring the oil from
crank-
case and head of the compressor removed, amount
that has migrated to other parts of the system can
be determined by subtracting the amount drained
from
the original oil charge of 11 fluid ozs. The
amount of oil equal to this
loss
shall
be drained from
the new compressor before it is installed.
INSTALLING
COMPRESSOR
After
idling compressor (on car) to be replaced
for 10 minutes at
1500-2000
engine
rpm, at maxi-
mum
refrigeration and blower at high speed: DO
NOT
add any more oil to the compressor than is
necessary or maximum cooling
will
be reduced.
1. Compressor replaced with new compressor.
a.
Remove compressor and place in a
hori-
zontal position with
drain
plug downward,
drain
compressor, measure quantity of oil drained and
then discard it.
b.
Drain
oil from replacement compressor and
save it.
c. (1) If amount of oil drained in 'a' is more
than
4 ozs., place into the new compressor the
same amount of oil drained from the replaced
compressor.
(2) If amount of oil drained in 'a' is 4 ozs.
or
less, place 6 ozs. of oil in the replacement
compressor.
d.
Install
compressor.
2. Compressor replaced with a field repaired
(overhauled) compressor.
a.
Proceed as in section 1 above, and then add
one extra oz. of oil. (More oil is retained in a
drained
compressor than one that has
been
rebuilt.)
REPLACING
AN
INOPERATIVE
COMPRESOR
In
the case when it is not possible to idle the com-
pressor to be replaced to
effect
oil
return
to it the
following
will
apply. DO NOT add any more oil than
is necessary or maximum cooling
will
be reduced.
1. Remove compressor from car,
drain
and mea-
sure
the oil.
2. If amount drained in "1"
above
is more than
1-1/2 fluid ozs., subtract this amount drained from
the original oil charge of 11 ozs. to obtain "oil
loss".
Take
new compressor assembly and
drain
from
it the amount of ''oil loss" above; (provided
the refrigeration system shows no evidence of a
major
leak, indicating that little or no oil has
been
lost
from the system. Minor leak indicating very
slow leakage.)
3.
If the amount drained in "1"
above
is
less
than
1-1/2 ozs of oil and/or system appears to have
lost
an
excessive amount of oil then:
a.
Disconnect the expansion valve
outlet
con-
nection (evaporator inlet).
b. Plug suction line connection at
P.O.A.
valve
outlet.
c. Disconnect oil bleed line at
P.O.A.
valve,
using care not to damage line.
d.
Connect a cylinder of Refrigerant-12 regu-
lated to not
exceed
125 psi to this oil bleed fitting
to force any retained oil from the evaporator out
the evaporator inlet fitting. (Reverse flush the
evaporator.)
Catch
any oil reverse flushed in this
manner.
If oil flushed from the system appears
clean,
install new compressor with 6-7
ounces
of oil.
4. If oil drained in "V
above
contains any
foreign material such as chips, or there is evidence
of moisture in the system, replace the receiver-
dehydrator assembly and flush all component parts,
or
replace if necessary. After flushing refrigeration
system in this manner, the
full
oil charge should be
left
in the new service compressor or 11 ozs. in-
stalled in an overhauled or repaired compressor.
COMPRESSOR
REMOVAL
1. Connect the high and low pressure
gauge
lines
from
the
gauge
set to the respective connections on
the
P.O.A.
valve and old compressor on the car. Be
sure
valves on
gauge
set are fully clockwise to
close
gauge
set to center fitting, that a J
5420
or J 6163
Schrader
adapter is
between
low pressure
hose
and
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