Manual 2003 Rev D p/n 2003
30
08
Troubleshooting
SYMPTOM
PROBABLE CAUSE
REMEDIES
Excessive
booster
temperature
Too much or too little
oil in gear reservoir
Check oil level.
See Lubrication on page 14
.
Too low operating
speed
Increase booster speed within limits.
Clogged filter or
silencer
Remove cause of obstruction.
Excessive pressure
differential
Reduce pressure differential across the booster.
Elevated inlet
temperature
Reduce inlet temperature.
Worn lobe clearances
Check for proper clearances.
See Assembly Clearances on
page 31
.
Rotor end or tip
drag
Insufficient assembled
clearances
Correct clearances.
See Assembly Clearances on page 31
.
Case or frame
distortion
Check mounting and pipe strain.
Excessive operating
pressure
Reduce pressure differential.
Excessive operating
temperature
Reduce pressure differential or reduce inlet temperature.
Vibration
Belt or coupling
misalignment
Check carefully. Re-align if necessary.
Lobes rubbing
Check cylinder for hot spots, and then check for lobe contact at
these points. Correct clearances.
See Assembly Clearances
on page 31
.
Worn bearings or gears Check condition of gears and bearings. Replace if necessary.
Unbalanced or rubbing
lobes
Possible build-up on casing or lobes, or inside lobes. Remove
build-up and restore clearances.
Driver or booster loose Check mounting and tighten if necessary.
Piping resonance
Check pipe supports, check resonance of nearby equipment,
and check foundation.