Lochinvar & A.O. Smith 100277757 Bearing Module

The Lochinvar & A.O. Smith 100277757 Bearing Module is a critical OEM replacement component designed to restore factory-spec rotation and mechanical efficiency in high-performance heating systems. This precision-engineered pump bearing kit serves as the primary interface between stationary and rotating assemblies, utilizing high-grade materials to minimize friction and prevent premature mechanical failure. For field technicians, this module is the direct replacement for legacy part numbers 100133537 and ARM1002, ensuring a drop-in fit without the need for field modifications. Each kit typically includes the professional-grade bearings and seals necessary to rebuild Lochinvar boiler pumps and A.O. Smith water heater circulation systems. By maintaining strict tolerances, the 100277757 helps eliminate shaft play and excessive vibration, which are common catalysts for seal leaks and motor stress. Whether you are performing routine maintenance or emergency repairs, utilizing genuine HVAC replacement parts like this bearing module is essential for protecting system integrity and operational longevity.

• Direct OEM Compatibility: Engineered specifically for Lochinvar and A.O. Smith equipment to ensure precise alignment and fit.
• Reduced Friction: High-grade bearing surfaces reduce heat buildup and energy consumption during continuous duty cycles.
• Complete Maintenance Solution: Functionally identical to ARM1002 and 100133537, providing a comprehensive solution for pump rebuilds.
• Enhanced Durability: Constructed with wear-resistant materials to withstand the high temperatures typical of commercial water heating applications.

• Is the 100277757 a direct swap for the ARM1002? Yes, the 100277757 is the current manufacturer-designated replacement for the ARM1002 and 100133537 modules.
• Does this kit include seals? Most 100277757 pump bearing kits include the necessary bearings and seals required for a standard module refresh.
• What are the signs of a failing bearing module? Technicians should look for increased audible noise, shaft vibration, or localized overheating near the pump housing.

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.