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Oil separator element life cannot be predicted; it will
vary greatly depending on the conditions of operation,
the quality of the oil used and the maintenance of the
oil and air filters. The condition of the separator can be
determined by pressure differential gauging or by in-
spection.
Pressure Differential Gauging – The "CHANGE
SEPARATOR" advisory will flash when the pressure
differential across the oil separator reaches approxi-
mately 8 PSID (.55 Bar). Replace the oil separator ele-
ment at this time. If ignored, the unit will shut down and
the advisory will illuminate steadily when the pressure
differential reaches 15 PSID (1 Bar).
Using an oil separator element at ex-
cessive pressure differential can
cause damage to equipment. Replace
the separator when the "Change Sep-
arator" advisory appears.
A sudden drop of zero pressure differ-
ential or sudden heavy oil carryover
may indicate a ruptured element.
Inspection – After removal of separator element,
shine a light inside the element to reveal areas of heavy
dirt or varnish deposits or breaks (ruptures) in the ele-
ment media.
Removal Of Oil Separator For Inspection Or Re-
placement:
Air/oil under pressure will cause
severe personal injury or death. Shut
down compressor, relieve system of
all pressure, disconnect, tag and
lockout power supply to the starter
before removing valves, caps, plugs,
fittings, bolts, and filters.
1.
Be certain unit is completely off and that no air
pressure is in the oil reservoir.
2.
Disconnect, tag and lockout power supply to the
starter.
3.
Remove screws holding the top plate to the sepa-
rator housing. Lift the top plate from the separator
housing.
4.
Lift the separator from the separator housing.
5.
Inspect and/or replace the separator as neces-
sary. Be sure the o–ring is not damaged. Before
installing (or reinstalling) any separator apply
grease to the o–ring. Oil will be wiped off by the
chamfer and the o–ring could be damaged.
6.
Remove any gasket material adhering to top plate
or separator housing, and install new gasket.
7.
Lower the separator into the housing and center
the separator on the chamfer. Press separator
down into the housing. Do not use excessive
force as separator damage can occur.
8.
Place the spacer on the indent in the separator.
Seat the top plate to the separator, spacer and
separator housing. Install and tighten all cap
screws.
9.
Run the unit and check for leaks.
COMPRESSOR OIL SYSTEM CHECK – The follow-
ing readings are based on ambient temperature of 80
F (27 C) for air–cooled oil cooler and 80 F inlet water
on water–cooled oil cooler, with the system in good
condition. Compressor should be at operating temper-
ature at the time of checks. One–half hour of loaded op-
eration is usually sufficient to reach level–out operating
temperatures.
Air and Oil Discharge Temperature – 165 to 195
F (74 to 91 C) – Read at gauge on the instrument
panel or check with a thermometer at the discharge
housing.
Compressor Oil Inlet Temperature – 150 to 160 F
(66 to 71 C) – Install a tee at the oil filter outlet and
check with a thermometer.
Oil Inlet Pressure – Check at the fitting in the line near
the compressor oil inlet. With air receiver pressure at
100 psi (6.9 Bar), oil inlet pressure should be 55–60
psig(3.8–4.1 Bar).
Oil Cooler Oil Pressure Differential (Air–Cooled
Radiator) – Check differential across oil system by
measuring oil inlet pressure as described above.
Oil Cooler Oil Pressure Differential (Water–Cooled
Heat Exchanger) – 2 to 25 PSID (.1 to 1.7 Bar) (65 to
150 PSIG, 4.5 to 10.3 Bars Receiver Pressure) –
13–8–606
Page 38
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Troubleshooting
