A Rheem 71-104625-17 Sheave/Pulley adjusts belt drive speed to maintain proper airflow and balanced performance in the system.
The sheave/pulley transmits motor power to the belt-driven assembly and allows speed adjustment so the heating and cooling equipment can maintain proper airflow and mechanical performance. Its variable-pitch design, single-groove configuration and 5.35-inch outside diameter are important because they control belt fit, alignment and rotational speed in the HVAC system.
The sheave/pulley may be failing if the heating and cooling unit shows reduced airflow, belt slippage, unusual squealing, vibration or inconsistent fan speed during operation. Physical signs can include groove wear, misalignment, rust or wobbling and you might notice dust buildup, moisture exposure or heat-related wear that could affect performance.
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