Parts for Lawnboy 522R (28231-7900001 & UP): Engine Assembly Parts

This poly-V motor pulley transfers power from the motor to the appliance drive belt, restoring proper belt tracking and rotation. Replaces a worn or damaged pulley to reduce belt slipping and restore reliable operation. What it does:

• Guides the poly-V (serpentine) drive belt for proper alignment and tension
• Replaces worn, cracked or scored pulley surfaces that cause belt slippage
• Helps stop squealing or grinding noises caused by a damaged pulley
• Restores consistent drum or agitator rotation when pulley wear is the root cause

• Disconnect power (unplug appliance or shut off breaker) before starting any repair
• Inspect the belt and surrounding components; replace the belt if it shows wear or damage
• Ensure pulley seats fully on the motor shaft and that belt is routed per the appliance's belt path