Gardner Denver EAH99C Operating And Service Manual page 73

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