Install new belts onto 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 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 in Section V 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 fan hub mounting capscrews.

Measure the belt tension again using belt tension gauge, Part Number ST-1138, and adjust if necessary.

When satisfactory belt tension is obtained, loosen the adjusting screw 1/2-turn to prevent breakage.