AUTO BELT TENSIONER
Figure 25 — Motor/Pulley, Tensioner, Disc and
Belt
Figure 26 — Tensioner and Belt Showing Tension
Alignment Marks
Fan rotated and blades removed
for clarity of detail
The Automatic Belt Tensioner comes from the factory mounted and preset for adequate belt tension. If further
tensioning is required, loosen the 3/8” bolt holding the tensioner to the tensioner bracket. Then, using a 15/16”
wrench, rotate the tensioner assembly such that the alignment mark is between mark 1 and 2 on the idler arm
(see Figure 19). Re-tighten the 3/8” bolt. Turn the blade assembly by hand to insure free rotation.
Do Not Over
Tension The Belt
. This will cause premature belt and bearing failure. To check that the belt tension is not too
high, place a finger midway between the fan pulley and motor pulley and push inward about 1/2”. The force
required to do this
is not
to exceed 5 pounds.
Front
View
Mark 2
Mark 1
Alignment mark
Page 9
