V-Belt Replacement; Alignment Of Pulleys And Belts - Greenheck TAUB-CA Installation, Operation And Maintenance Manual

Do not install new belts on worn sheaves. If the
sheaves have grooves worn in them, they must be
replaced before new belts are installed.
The proper tension for operating a V-belt is the lowest
tension at which the belts will not slip at peak load
conditions. Belts are adjusted by raising or lowering
the motor pivot plate. For initial tensioning, the proper
belt deflection is 1/64 in. for each inch of belt span,
measured half
way between the
pulley centers.
For example, if
the belt span is
64 inches, the belt
deflection should
be 1 inch using
moderate thumb
pressure at mid-
point of the drive.
Check belt tension two times during the first
24 hours of operation and periodically thereafter.
NOTE
Model TAUB may require high temperature belts.
REMOVAL OF DUST AND DIRT -
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 cover on TAUB-CA and TAUB
fans should be removed and the motor cleaned of dirt
and debris. Cleaning of the motor on all fans should
be limited to the 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.
®
Deflection = Belt Span
64
Belt Span
Model TAUD,

V-Belt Replacement

The V-belt drive components, when supplied by
Greenheck, have been carefully selected for this
unit's specific operating condition. Changing V-belt
drive components could result in unsafe operating
conditions which may cause personal injury or failure
of fan components.
1. Remove the protective coating from the end of the
fan shaft using mineral spirits or another similar
solvent. Check to ensure that the shaft is free of
nicks and burrs.
2. Slide sheaves on shafts. Do not drive sheaves on
as this may result in bearing damage.
3. Align fan and motor sheaves with
a laser, straight-edge or string
and tighten.
4. Place belts over sheaves.
Do not pry or force
belts, as this could
result in damage to the
cords in the belts.
5. Adjust the tension until
the belts appear snug.
Run the unit for a few
minutes (refer to unit start-up section) and allow
the belts to "set" properly.
6. With the fan off, adjust the belt tension by moving
the adjustable motor plate. (Belts are adjusted
by raising or lowering the motor plate). When in
operation, the tight side of the belts should be in
a straight line from sheave to sheave with a slight
bow on the slack side.

Alignment of Pulleys and Belts

Check pulleys and belts for proper alignment to avoid
unnecessary belt wear, noise, vibration and power
loss. Motor and drive shafts must be parallel and
pulleys in line as shown.
CORRECT WRONG
The adjustable motor pulley is set at the factory for
the fan RPM specified by the customer. Fan RPM can
be increased by closing or decreased by opening the
adjustable motor pulley. Multi-groove variable pitch
pulleys must be adjusted an equal number of turns
open or closed. Any increase in fan speed represents
a substantial increase in load on the motor.
To avoid motor overheating and possible burnout,
motor load amperes should always be checked and
compared to nameplate rating when fan speed is
increased.
Aligning Sheaves
with a Straight Edge
WRONG WRONG
Tube Axial Upblast Fans 9