CompAir Classic 05 - Oil Mist from Air Intake When Stopping And;Or Rapid Venting; Unusual Noise or Vibration; Safety Valve Lifting

Ref Symptom
Cause
(Level 1)
Cause
(Level 2)
Diagnosis
Cause
(Level 3)
Action
4.5
Remove separator cap
and bottle and examine
separator.
If separator element are
broken, Replace separator
element, oil return
restrictors, clean oil filter
and change oil
E
Oil mist from air intake when stopping and/or rapid venting
5.1
Unloader valve
seats damaged
Remove air filter and
support and observe
where mist exits when
machine is stopping.
Replace damaged seats
5.2
Unloader valve
body worn
Remove air filter and
support and observe
where mist exits when
machine is stopping.
Replace unloader valve
body
5.3
Vacuum valve
seal leaking
Remove air filter and
support and observe
where mist exits when
machine is stopping.
Replace Vacuum valve
seal/gasket
5.4
Servo valve
leaking
Remove air filter and
support and observe
where mist exits when
machine is stopping.
Replace servo valve
5.5
Bearing end
cap gasket
leaking
Remove air filter and
support and observe
where mist exits when
machine is stopping.
Replace bearing end cap
gasket
F
Unusual noise or vibration during running
6.1
Vacuum valve
incorrectly
adjusted
Compressor makes
rattling noise when
running off load only.
Adjust vacuum valve
6.2
Fan fouling
cooler ducting
Visually check for
inteference.
Check/realign ducting
6.3
Damaged/worn
drive coupling
Remove grommet from
bell housing and visually
check coupling. Remove
compressor from motor to
verify.
Check/replace motor
coupling
6.4
Motor bearing
failure
Listen for rumbling or
screaming noise from
each end of motor.
Remove compressor and
rotate motor by hand to
check for rough feeling.
Check/replace motor
bearings
6.5
Seized blade in
slot
Listen for uneven popping
noise from compressor
under load. Remove intake
end cover to check
condition of blades.
Check/free/replace blades
G
Safety valve lifting
7.1
Overpressure
in compressor
Servo set too
high
Read pressure gauge. Adjust servo
Servo piston
incorrectly
assembled
Remove servo assembly
and check orientation of
piston.
Reassemble servo and
adjust
Excessive
Air intake
during
offload running
Read pressure
gauge.
Leaking
vacuum
valve
Replace vacuum
valve seals and
gasket
Page 94
CompAir Hydrovane
6 Fault Finding