Removal
Loosen the four capscrews which secure the fan hub to
the bracket.
Turn the adjusting screw counterclockwise to release
tension, and remove the belts.
Installation & Settings
Visually inspect the pulley alignment. Pulley misalignment must not exceed 0.5mmper cm [1/16-inch per foot] of distance between the pulley centers. Inspect, repair, or replace the fan hub or the fan hub support bracket if pulley misalignment exceeds 0.5 mm per cm [1/16-inch per foot].
Install new belts on the pulley. When a drive pulley uses two or more belts, replace the belts as a complete set.
NOTE: To prevent damage, do not roll a belt over the pulley or pry it on with a tool.
Turn the adjusting screw to increase the belt tension.
NOTE: Belt tension can increase when the fan hub mounting capscrews are tightened. Do not adjust the belt tension to full value with the adjusting screw.
Tighten the two capscrews until the fan hub is in correct alignment with the fan hub bracket.
NOTE: Do not tighten the capscrews to full torque value.
Measure the belt tension.
Refer to the Belt Tension Chart shown to select the correct gauge and tension values for the belt width.
A belt is considered used if it has been in operation for at least 10 minutes.
Tighten the two capscrews.
Torque Value: 108 Nโขm [80 ft-lb]
Measure the belt tension again using service tool, ST-1138. Adjust if necessary.
When satisfactory belt tension is obtained, loosen the adjusting screw 1/2-turn to prevent breakage.
