21
05
Installation
Operator’s Manual 2009 Rev B p/n 2009
Too Tight
Slight Bow
Too Loose
20/64” = 5/16”
(8 mm)
20”
(50.8 cm)
8-10 lbs.
(3.6-4.5 kg)
Figure 5-5 – General Appearance of a V-belt Drive
Too Tight
Slight Bow
Too Loose
20/64” = 5/16”
(8 mm)
20”
(50.8 cm)
8-10 lbs.
(3.6-4.5 kg)
Figure 5-6 – Setting of Proper Tension for a V-belt Drive
Factors outside the control of the belt tensioning
system used on an individual blower package
assembly, such as environmental factors and
quality of the belts installed, may contribute to
decreased belt life. Such factors can cause wear
of the belts beyond the ability of the tensioning
system to compensate.
As such, it is recommended to check belt tension
monthly and make any manual adjustments found
necessary.
1. Turn off and lock out power.
2. Remove the fasteners from the belt guard (if
equipped).
3. Remove the belt guard.
4. Check and adjust the belt tension as
necessary. Tension should be 1/64 in.
deflection per inch of span (0.157 mm
deflection per centimeter of span) between
sheaves, with 8 – 10 lb (3.6 – 4.5 kg) force
applied at the center point of the top section of
the belt.
5. Install the belt guard, making sure that all drive
components are free of contact with the guard.
6. Install the belt guard fasteners that were
removed in step 2.
7. Unlock the power and start the blower.
8. Resume normal operation.
