Gardner Denver EBB BB-7.5 HP Operating And Service Manual page 44

SYMPTOM
Compressor is low on
delivery and pressure (continued).
High discharge air
temperature.
Excessive Oil Consumption
Oil Carry–Over
Air/oil under pressure will cause severe personal injury or death. Shut down com-
pressor, relieve system of all pressure, disconnect, tag and lockout power supply
to the starter before removing valves, caps, plugs, fittings, bolts, and filters.
POSSIBLE CAUSE
3. Intake controller is
incorrectly set.
4. Minimum pressure valve
stuck closed.
1. Thermostatic mixing
valve stuck open.
2. Dirty or clogged cooler face.
3. Insufficient cooling
air flow.
4. Clogged oil filter or
cooler (interior).
5. Low compressor oil.
6. Fan motor fuses blown.
1. Oil carryover through lines.
2. Oil leaks at all fittings
and gaskets.
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.
13–8–612 Page 34
REMEDY
3. Adjust controller. See
Section 4, page 17.
4. Replace valve.
1. Repair or replace valve.
2. Clean cooler.
3. Provide unrestricted supply
of cooling air.
4. Replace filter or clean
cooler.
5. Add oil to proper level.
6. Check wiring, replace fuses.
1. See "Oil Carryover", in this
section.
2. Tighten or replace fittings
or gasket.
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 2000, 4000 or
9000 SP Lubricating Coolant.
6. Replace valve.