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16-18
GROUP 16-
VENTILATING AND HEATING
NORMAL
WEEPAGE
PAST
CARBON RING
LEAKAGE
THROUGH
"0-RING"
FIG. 15- Oil Leak paths compressor oil seal.
4·11
/
1 6 1 N C H - - - - 1
-1-1
12
1NCH-1
I
\
THIS
END
FOR
HORIZ().ITAL
MOUNT
Ca.IPRESSOR
OIL TO BE CHECKED WITH
KEYWAY IN SHAFT FACING
12 NOTCHES
1/8 INCH
APART
STARTING AT
EACH
END
THE HEAD OF THE COMPRESSOR.
Ll293-A
FIG. 16- Compressor oil level dipstick.
.
.
of the compressor beyond the clutch
or has sprayed on the hood and surr-
ounding brackets, the leakage is
excessive. Replace the seal assembly.
Oil Leakage Through
0-Ring
Leakage through the 0-ring type
gasket
on
the cover plate (center
illustration,
Fig.15
) indicates possible
cracked,
pinched, split or loose
mounting screws. Check the screws
for
good
condition and proper
torque (7 to
13
ft-lbs). If there
is
heavy oil discharge with screws of
good condition and correct torque,
replace the oil seal assembly.
Oil Leakage Through
Damaged Bellows
Oil will leak
through
the rubber
bellows
as
shown
in
the right illust-
ration of Fig. 15 if the bellows
distorts or cracks due to heat. A large
discharge of .oil on the front of the
compressor beyond the clutch indi·
cates this type of leakage. Replace
the oil seal assembly.
Refrigerant-12 Leakage
Refrigerant-12leakage through any
part of the seal can be determined
only by a leak detector. Be sure to
wipe all the oil away from the
~eal
area before using the leak detector,
because the oil may contain refriger-
ant which would give erroneous
readings. If refrigerant leakage at the
seal exceeds I oz. per year, replace
the seal as outlined in Section 5.
If no leak is found at the com-
pressor crankshaft seal, thoroughly
check
all system fittings and lines
for
leaks as outlined in this Section.
LEAKAGE THROUGH
DAMAGED BELLOWS
RUBBER TUBING
FIG.
17- Compressor oil level,
check and oil trap.
COMPRESSOR OIL LEVEL CHECK
Under normal
conditions, when
the
air conditioning system is operating satis-
factorily, the compressor
oil level need
not' be
checked.
There
is
no place
for
the
oil to
go except inside
the
sealed system,
when
the
engine is first started, some
of
the
oil will
be pumped
into
the rest
of
the
refrigerant
system.
After
several
minutes
of operation, most
of
the oil
is returned
to
the
compressor crankcase.
Check the compressor oil level only
if any portion of the refrigerant system
is being replaced, or if there was a leak in
the system and the" refrigerant is being
replaced.
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