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(888) 312-8812 Login SignupAUTOMATIC BELT TENSIONER, HD, DAYCO
The Dayco Automatic Belt Tensioner ensures optimal engine performance by automatically adjusting belt tension, eliminating the need for constant monitoring. Dayco's design utilizes a "flat spring" mechanism that minimizes tension variations, reducing premature wear on accessory bearings during new belt installation. The tensioner also features an embedded PTFE string that provides abrasion resistance for the belt and dampens noise for quieter operation. Built with durable, weatherproof materials, the Dayco 89447 shrugs off harsh elements and extreme temperatures for peak performance and longer service life.
| Type | Automatic |
| Direction | Counter Clock Wise |
| Belt Type | Serpentine |
| Number of Pulleys | 1 |
| Pulley 1 Diameter | 74 mm |
| Pulley 1 Flat | Y |
| Pulley 1 Width | 42.6 mm |
| Country of Origin (Primary) | US |
| Harmonized Tariff Code (Schedule B) | 8708998180 |
| UPC | 00036687422347 |
| Brand | Part Number |
|---|---|
| CUMMINS | 2871294, 4299053, 4920105, 3691280, 38711294 |
| GATES | 38569, 38622 |
| AC DELCO | 38569 |
| CARQUEST | 38569, 38622 |
| NAPA | 38569, 38622 |
| GOODYEAR | 49545 |
| Duralast | 89447 |
| DYNACRAFT | D1186-2621 |
| CATERPILLAR | 200-2279, 347-7963 |
| CHRYSLER | 4246205 |
| Continental Elite | 49545, 49579 |
| BANDO | 680016, 680044 |
| LITENS | 680044, 910033A, 910137A |
| KIT MASTERS | 689447 |
| TENDECO | 910033, 910037 |
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For over 100 years, Dayco® has been a world leader in the development, manufacture, and distribution of essential engine drive components for the aftermarket sector. Its catalog covers a wide range of drive system components for various applications, including automotive, truck, construction, agriculture, industrial machinery, and hybrid electric vehicles. For heavy duty trucks and buses, Dayco specializes in serpentine and V-belts, vibration dampers, thermostats, water pumps, expansion tanks, and gaskets. Dayco parts are built with durability in mind, using high-grade materials and tested in compliance with the latest standards set by the automotive industry. These result in parts that are superior in reliability, performance, and service life over the competition.
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