{"product_id":"usmotors811757002-811757-002-pump-motor-3-4-hp","title":"USMOTORS811757002 811757-002 Pump Motor 3\/4 Hp","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe USMOTORS811757002 811757-002 is a 3\/4 HP single-phase pump motor designed as a direct replacement for Armstrong circulator and pump applications. This motor delivers reliable rotational power to the pump assembly and is a core component in hydronic heating, cooling, and fluid-transfer systems. At 3\/4 horsepower, it is sized for moderate-duty residential and light commercial pump loads. Licensed HVAC technicians and plumbers install this motor when the original unit shows bearing failure, winding damage, or thermal cutout trips that cannot be reset.\u003c\/p\u003e\u003cp\u003eThis motor is intended for use with Armstrong H-54, H-64, and S-57 series pumps. Those pump models are common in hydronic heating systems, chilled-water loops, and domestic water circulation applications. Installation is typically performed during a planned maintenance visit or as an emergency replacement when system flow drops due to motor failure. The motor mounts directly to the pump volute in the same footprint as the original, minimizing downtime during service.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e3\/4 HP output rated for moderate-duty pump loads\u003c\/li\u003e\n\u003cli\u003eSingle-phase power configuration for standard residential and light commercial electrical service\u003c\/li\u003e\n\u003cli\u003eDirect OEM-replacement design for Armstrong H-54, H-64, and S-57 pumps\u003c\/li\u003e\n\u003cli\u003eDrop-in fitment reduces labor time during replacement service\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct replacement motor for Armstrong H-54, H-64, and S-57 series pumps.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed HVAC technician or plumber. Shut off electrical power at the disconnect or breaker and isolate the pump from the hydronic or water system before beginning work. Verify that supply voltage and phase match the motor nameplate before energizing. Follow applicable NEC requirements for motor branch circuit wiring and disconnect sizing.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorsepower\u003c\/strong\u003e: 3\/4 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase\u003c\/strong\u003e: 1 Phase\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: USMOTORS811757002\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 811757-002\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"US MOTORS","offers":[{"title":"Default Title","offer_id":51525364154674,"sku":"811757-002","price":1593.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5ebfefa6158753d202fcb9a01dce9ca8.png?v=1785471752","url":"https:\/\/voomisupply.com\/products\/usmotors811757002-811757-002-pump-motor-3-4-hp","provider":"Voomi Supply","version":"1.0","type":"link"}