Tuthill 3200 - Page 22

18
05
Maintenance
Operator’s Manual 2010 Rev B p/n 2010
SYMPTOM PROBABLE CAUSE REMEDIES
Excessive
blower
temperature
Too much or too little oil in gear
reservoir
Check oil level. See Lubrication (Splash) on page 11.
Too low operating speed Increase blower speed within limits.
Clogged lter or silencer Remove cause of obstruction.
Excessive pressure differential Reduce pressure differential across the blower.
Elevated inlet temperature Reduce inlet temperature.
Worn lobe clearances
Check for proper clearances. See Assembly Clearances on
page 25.
Rotor end or tip
drag
Insufcient assembled
clearances
Correct clearances. See Assembly Clearances on page
25.
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. Realign 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 25.
Worn bearings or gears Check condition of gears and bearings. Replace if necessary.
Unbalanced or rubbing lobes
Possible buildup on casing or lobes, or inside lobes. Remove
buildup and restore clearances.
Driver or blower loose Check mounting and tighten if necessary.
Piping resonance
Check pipe supports, check resonance of nearby equipment,
and check foundation.