13-9-663 Page 72
SYMPTOM POSSIBLE CAUSE REMEDY
Oil carryover
1. Overfilling the reservoir. 1. Drain excess oil from
system.
2. Clogged, broken or loose
oil return lines.
2. Tighten or replace faulty
lines.
3. Ruptured oil separator
element.
3. Replace element.
4. Loose assembly. 4. Tighten all fittings and
gaskets.
5. Foam caused by use of
incorrect oil.
5. Use Gardner Denver
AEON 4000 or 9000 SP
lubricating coolant.
6. Inoperative minimum
pressure valve.
6. Replace seals in valve.
7. Operation at elevated
discharge temperatures.
7. Reduce temperature. See
“High Discharge Air
Temperature”, this
section.
8. Scavenge line check valve
failure.
8. Replace check valve.
9. Water condensate in oil. 9. Check oil reservoir
temperature and if low,
change thermal mixing
valve element to higher
temperature.
NOTICE
Gardner Denver factory remanufactured replacement compressor airend units
are available from your authorized distributor, on an exchange basis, for all
rotary screw compressor units.
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