Belt-Drive Blower Speed Adjustment

The blower speed and motor amperage on a belt-drive blower motor can be adjusted by changing the pulley (or sheave) size.

Motor Pulley

• Increasing the size of the motor pulley = More Speed and Higher Amperage
• Decreasing the size of the motor pulley = Less Speed and Lower Amperage

Blower Pulley

• Increasing the size of the blower pulley = Less Speed and Lower Amperage
• Decreasing the size of the blower pulley = More Speed and Higher Amperage