Rheem-Ruud 51-23012-31 Motor

The Rheem-Ruud 51-23012-31 Motor is a high-performance 1/2 HP replacement blower motor designed for direct-drive applications in HVAC furnace systems. Engineered as a Permanent Split Capacitor (PSC) motor, it operates on a standard 120V single-phase circuit at a multi-speed rating of 1075 RPM. This unit serves as the OEM equivalent for the retired 51-18828-01 model, ensuring a precise fit within a 48 NEMA frame configuration. Built for continuous operation, the open air over (OAO) enclosure utilizes the airstream for thermal management, paired with sleeve bearings for quiet, long-term performance in residential and light commercial air handlers.

For field installations, this reversible rotation motor features a 1/2" x 5" shaft and supports shell-band or thru-bolt mounting, providing the versatility required by technicians working with varying bracket designs. Operating at 9.8 Amps, it delivers reliable torque across three speed taps, allowing for optimized CFM delivery based on the specific requirements of the air conditioning or heating cycle. When performing a swap, professionals should verify the capacitor specifications and ensure the direct drive blower assembly is clear of debris to maintain the integrity of the new 1075 RPM motor's internal windings.

• Universal Compatibility: Serves as a direct 1/2 HP replacement for multiple Rheem, Ruud, and Protech part numbers including 51-18828-01.
• Quiet Operation: Equipped with precision-machined sleeve bearings to minimize vibration and mechanical noise within the blower housing.
• Flexible Installation: Features reversible rotation and multiple mounting options (shell-band / thru-bolt) to adapt to various furnace configurations.
• Optimized Airflow: 3-speed functionality allows for precise tuning of the system's static pressure and CFM requirements.

What is the direct replacement part number for 51-18828-01?
The Rheem-Ruud 51-23012-31 is the official engineered replacement for the 51-18828-01 blower motor.

Can this motor be used in CCW or CW applications?
Yes, this 120V HVAC motor features reversible rotation, allowing technicians to configure it for either clockwise (CW) or counter-clockwise (CCW) operation during setup.

Does this motor require a new run capacitor?
It is standard trade practice to replace the PSC motor capacitor whenever a new blower motor is installed to ensure optimal starting torque and motor longevity.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.