
40
11. TROUBLESHOOTING
Although Tuthill Vacuum & Blower Systems boosters are well designed and manufactured, problems may
occur due to normal wear and the need for readjustment. The chart below lists symptoms that may occur
along with probable causes and remedies.
SYMPTOM
PROBABLE CAUSE
REMEDIES
Loss of oil
Gear housing not tightened
properly.
Tighten gear housing bolts.
Lip seal failure.
Disassemble and replace lip seal.
Insufficient sealant.
Remove gear housing and replace sealant. See the
Disassembly
section.
Loose drain plug.
Tighten drain plug.
Excessive
bearing or
gear wear
Improper lubrication.
Correct oil level. Replace dirty oil. See the
Lubrication
section.
Excessive belt tension.
Check belt manufacturer’s specifications for tension and adjust accordingly.
Coupling misalignment.
Check carefully, realign if necessary.
Lack of
volume
Slipping belts.
Check belt manufacturer’s specifications for tension and adjust accordingly.
Worn lobe clearances.
Check for proper clearances. See the
Assembly Clearances
section.
Speed too low.
Increase booster speed within limits.
Obstruction in piping.
Check system to assure an open flow path.
Knocking
Unit out of time.
Re-time.
Distortion due to improper
mounting or pipe strains.
Check mounting alignment and relieve pipe strains.
Excessive pressure
differential.
Reduce to manufacturer’s recommended pressure. Examine relief valve and reset if
necessary.
Worn gears.
Replace timing gears. See the
Disassembly
section.
Excessive
booster
temperature
Too much or too little oil in
gear reservoir.
Check oil level. See the
Lubrication
section.
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 the
Assembly Clearances
section.
Rotor end or
tip drag
Insufficient assembled
clearances.
Correct clearances. See the
Assembly Clearances
section.
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, then check for lobe contact at these points. Correct
clearances. See the
Assembly Clearances
section.
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 booster loose.
Check mounting and tighten if necessary.
Piping resonance.
Check pipe supports, check resonance of nearby equipment, check foundation.
Summary of Contents for M-D Pneumatics 7010
Page 43: ...43 NOTES ...
Page 50: ...50 3200C CUTAWAY DRAWING 3200 90C 91C 92C 93C 1 OF 2 A ...
Page 51: ...51 3200C CONFIGURATIONS DRAWINGS 3200 90C 91C 92C 93C 2 of 2 A ...
Page 54: ...54 5500C CUTAWAY DRAWING 5500 90C 91C 92C 93C 1 OF 2 E OIL LEVEL SIGHT GAUGE DETAIL ...
Page 55: ...55 5500C CONFIGURATIONS DRAWINGS 5500 90C 91C 92C 93C 2 of 2 E ...
Page 56: ...56 7000C CUTAWAY DRAWING 7000 90C 91C 1 OF 3 ...
Page 57: ...57 7000C CONFIGURATIONS DRAWING 7000 90C 2 OF 3 ...
Page 58: ...58 7000C CONFIGURATIONS DRAWING 7000 91C 3 OF 3 7000 91C 7013 SHOWN ...
Page 68: ...68 NOTES ...