Lennox 98M74 Blower Wheel

The Lennox 98M74 Blower Wheel is a high-performance direct replacement for R02592A004, engineered for heavy-duty HVAC blower motor assemblies found in residential furnaces and air handlers. This OEM Lennox blower wheel measures 10 inches in diameter by 6.5 inches in width with a 1/2-inch bore size, designed specifically for a clockwise (CW) rotation. When performing a furnace blower wheel replacement, precision balance is critical to prevent vibration and premature motor bearing failure. The 98M74 features a convex hub and approximately 48 blades for maximized cubic feet per minute (CFM) output, ensuring consistent airflow through the evaporator coil or heat exchanger. This 10x6.5 blower wheel is also backward compatible with legacy part numbers 47K29, 47K2901, and 20314101. For technicians servicing units like the CHP29 or 15CHPXA series, verifying the setscrew alignment on the motor shaft's flat spot is essential for a secure, slip-free installation.

Key Benefits for Technicians:

• Direct OEM Fit: Ensures exact clearance within the blower housing, eliminating the need for field modifications and reducing labor time.
• Optimized Airflow: The precision-stamped 10x6 1/2" CW blade configuration maintains factory-specified static pressure and system efficiency.
• Broad Compatibility: Functions as the primary furnace replacement part for multiple Lennox, Allied, Armstrong, and Ducane equipment lines.
• Reduced Decibel Levels: Dynamically balanced at the factory to eliminate the resonance and "rattling" common in aftermarket universal alternatives.

Common Questions about the Lennox 98M74:

The 98M74 is standard for a wide range of Lennox air handlers and furnaces requiring 10-inch diameter wheels. It is the designated successor to the R02592A004. Always verify the rotation (CW) and bore size (1/2") before installation.

Technicians should apply a thin layer of high-temperature anti-seize or clear lubricant to the motor shaft before sliding on the new wheel to facilitate easier removal during future maintenance cycles.

Most Lennox HVAC systems require a 5/16" nut driver for the housing components and an adjustable wrench or 1/4" ratchet with an extension to tighten the blower wheel setscrew to the flat side of the motor shaft.

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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.