D--9--611 Page 17
PROBLEM
POSSIBLE CAUSES
SOLUTION
1.
Insufficient assembled
1.
Return for Warranty. (See page 18.)
clearances.
2.
Case or frame distortion.
2.
Remove all mounting and pipe strains.
3.
Excessive operating pressure.
3.
Remove cause.
4.
Excessive operating temperature.
4.
Remove cause.
5.
Material ingestion through the
5.
Replace worn inlet and inline filters.
blower.
Install check valve between blower
and first material load point to elimi--
nate blow--back when blower is
stopped.
1.
Slipping belts.
1.
Tighten belts to proper tightness.
2.
Worn clearances.
2.
Replace rotors. (See page 18.)
3.
Blower RPM too slow.
3.
Increase Blower speed. Check
sheave set.
1.
Improper lubrication.
1.
Correct lubrication level. Replace
dirty oil with AEON PD Synthetic
Blower Lubricant.
2.
Oversized belt drive, over--
2.
Re--tension belts to proper tightness.
tightened belts.
Check drive to eliminate possible
overhung load condition.
1.
Worn oil seal.
1.
Replace seals. (See page 17.)
2.
Damaged seal sleeve.
2.
Replace sleeve. (See page 17.)
3.
Gear case or drive cover
3.
Clean breather filters.
breathers plugged.
1.
Endplate seal vents plugged.
1.
Clean vents of obstruction. Do not
plug seal vents.
2.
Worn oil seal.
2.
Replace seals. (See page 17.)
1.
Worn oil seal.
1.
Replace seal. (See page 17.)
2.
Damaged seal sleeve.
2.
Replace sleeve. (See page 17.)
1.
Inadequate package design.
1.
Reinstall base -- fill with concrete.
2.
Soft foot.
2.
Shim to eliminate condition.
3.
Material build--up inside rotors.
3.
Replace worn inlet and inline filters.
Install check valve between blower
and first material load point to elim--
inate blow--back when blower is
stopped
4.
Bearing failure.
4.
Replace bearings.
5.
Excessive gear wear.
5.
Replace gears.
6.
Bent shaft.
6.
Replace rotor set.
7.
Internal mechanical contact.
7.
See “Rotor Contact” above.
If you are unable to resolve the problem, contact your DuroFlow Distributor for immediate assistance.
Rotor contact
with housing
or endplate.
Lack of CFM
delivery.
Excessive bearing
or gear wear.
Loss of oil from
seal vents.
Loss of oil from
breather filters.
Loss of oil from
driveshaft seal.
Excessive
vibration.
