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ROUTINE MAINTENANCE FOR BELT DRIVE FANS —
Once the fan has been put into operation, periodic maintenance should be scheduled to assure reliability and performance. The
following items should be checked as a part of this maintenance schedule:
1. Fasteners and set screws
2. Bearings
1. FASTENERS AND SET SCREWS - Normal fan vibration has a tendency to loosen mechanical fasteners. Periodic inspection
should include checking all fasteners and set screws, including the propeller fasteners, for tightness.
2. BEARINGS - The pillow block ball bearings installed on Model TAUB-CA and TAUB fans are air handling quality, grease
lubricated, self aligning, and selected for a minimum L(10) 40,000 hours (equal to L(50) 200,000 hours). However, bearings are
one of the most critical parts of a fan and should be inspected at regular intervals. Locking collars, set screws and fasteners
attaching the bearings to the fan should also be checked.
3. LUBRICATION - Bearings operating in a clean environment and temperatures between 32°F and 200°F should be lubricated
semiannually using a high quality lithium based grease. Bearings operating outside these temperature parameters require
special high or low temperature grease. If contamination or high moisture conditions exist, more frequent lubrication is
required.
Model TAUB-CA and TAUB fans are equipped with extended lubrication lines as standard. The grease fittings are located on
the exterior of the fan housing next to the motor weather cover and should be wiped clean before adding grease.
When adding grease to the fan bearings, rotate the fan shaft while slowly operating the manual grease gun. Be careful not to
unseat the bearing seals by over lubricating or using excessive pressure. Stop pumping when a very slight resistance is
felt at the grease gun.
Lubrication of motors is intended only when fittings are provided. Many fractional horsepower motors are permanently
lubricated for life and require no further lubrication. Motors supplied with grease fittings should be greased in accordance with
the manufacturer's directions on the motor nameplate.
4. BELTS - Premature belt failures are frequently caused by improper belt tension (either too loose or too tight), misaligned
pulleys or by prying belts on and off pulleys. The proper tension for operating a V-belt is the lowest tension at which the belts
will not slip at peak load conditions. For initial tensioning, the proper belt deflection is 1/64 in. for each inch of belt span,
measured half way between the pulley centers.
Example: A belt span of 32 inches should have a 32/64 or 1/2 inch of deflection using moderate thumb pressure at the
midpoint of the belt span. See drawing below. Check belt tension after the first 24 hours of operation, after 100 hours of
operation and periodically thereafter. Belt tension can be adjusted by loosening the motor plate hinge bolts and adjusting the
jack screws as required.
When replacing belts, always use the same size and type as originally supplied by the factory. Check pulleys for wear and
replace both pulleys and belts if wear is evident. NOTE: Model TAUB may require high temperature belts. It is very important
that the drive pulleys remain in proper alignment after adjustments are made. Misalignment of pulleys will result in premature
belt and bearing failure, noise and loss of fan efficiency.
Deflection =
Belt Span
5. REMOVAL OF DUST AND DIRT - Model TAUB-CA and TAUB fans require very little attention when moving clean
air. If exhausting dirty or contaminated air, the propeller and butterfly damper assembly should be cleaned periodically.
Accumulations of dirt and debris on the propeller blades may cause an unbalanced condition resulting in excessive vibration
and premature failure of the propeller and bearings. Excessive buildup of dirt on the damper blades may cause binding and
sticking blade hinges resulting in loss of fan performance.
Periodically, the motor weather cover should be removed and the motor cleaned of dirt and debris. Cleaning should be limited
to the motor exterior. Removal of dust and dirt from the motor will assist in motor cooling. Motors should never be sprayed
directly with water, steam or solvents.
3. Lubrication
4. Belts
Belt Span
64
CORRECT
CAUTION: See **WARNING** on page 1
5. Removal of dust and dirt
WRONG
WRONG
3
WRONG
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