24
QFNA-IOM-1
Maintenance
Interval
Task
Procedure
Notes
Every two-three
months
Check bearing
Be sure all setscrews and bolts are
tight. Check for excessive noise,
vibration, and temperature. Tighten
screws and bolts as needed.
Every six
months
Inspect and clean
V-belt drives,
sheaves, and belts
Check for proper alignment, tension,
and signs of belt wear. Belts must be
tight enough to avoid squeal and
slippage during operation. Clean
sheaves and belts with a dry cloth. Do
not apply belt dressing. Replace worn
belts as needed.
Slight squeal by belts at startup is
normal. Overtension of belts will
cause fan and motor bearing wear
and shorten the life of the belt. Oil and
grease must be kept away from belts
and sheaves since they cause
deterioration and belt slippage.
Inspect and clean
inlet vanes
Inspect vanes for freedom of
operation and wear
Clean with dry cloth as needed.
The vanes have sleeve-type bearings
that do not require lubrication.
Inspect the isolation
base
Inspect for freedom of movement and
the bolts for tightness. Inspect springs
for cracks and fatigue. Check rubber
isolation for deterioration. Replace
parts as needed.
Keep oil, grease, chemicals and dirt
away from isolators.
Inspect and clean
wheel and housing
Check all bolts and screws on entire
fan for tightness. Retighten to
specifications in tables. Remove any
dirt accumulation on the wheel or in
the housing to prevent imbalance.
Inspect for any accumulation of dirt on
inlet cone. Clean as needed.
Touching up paint on fans and
accessories occasionally will prevent
deterioration of metal and maintain fan
performance. This is especially
important on units having special
coatings.
Every year
Grease motor
(moderate/clean
service*)
See lubrication instruction on motor
nameplate or on tag attached. If motor
has grease fitting and relief plugs,
remove and clean out any hardened
grease. Add fresh grease at the fitting
with a low pressure gun. Run the
motor a few minutes to expel grease
through the relief vent.
Replace all plugs, fittings.
In moderately dirty, moist 12-24 hr
service conditions grease motors
10-40 hp. In clean, dry 8-16 hr service
conditions, grease motors 50-150 hp.
Every two
years
Grease motor
(moderate service*)
See lubrication instruction on motor
nameplate or on tag attached. If motor
has grease fitting and relief plugs,
remove and clean out any hardened
grease. Add fresh grease at the fitting
with a low pressure gun. Run the
motor a few minutes to expel grease
through the relief vent.
Replace all plugs, fittings.
In moderately dirty, moist 12-24 hr
service conditions grease motors up
to 7-1/2 hp.
Every three
years
See lubrication instruction on motor
nameplate or on tag attached. If
motor has grease fitting and relief
plugs, remove and clean out any
hardened grease. Add fresh grease
at the fitting with a low pressure gun.
Run the motor a few minutes to expel
grease through the relief vent.
Replace all plugs, fittings.
Table 9 - Schedule Maintenance - Q Fan and Super Q II Fan (Continued)
