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(888) 312-8812 Login SignupAUTOMATIC BELT TENSIONER, HD, DAYCO
Maintain precise serpentine belt tension with the Dayco Automatic Belt Tensioner. Its cast-aluminum body resists cracking, contamination, and deformation, providing long-term durability in heavy-duty under-hood conditions. The rugged pulley, featuring dual lifetime-lubricated bearings, rotates smoothly while supporting accessory drives. An advanced wave spring and bonded polymer ring absorb vibrations and reduce belt flutter, minimizing noise and extending belt life. Designed for heavy-duty diesel engines, the Dayco 89490 tensioner ensures consistent belt alignment, reduces housing separation risk, and delivers reliable accessory drive performance.
| 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 | 32.8 mm |
| Country of Origin (Primary) | US |
| Harmonized Tariff Code (Schedule B) | 8708998180 |
| UPC | 00036687832245 |
| Brand | Part Number |
|---|---|
| 4 SEASONS | 45825 |
| 4-SEASONS | 45825 |
| AC DELCO | 38517 |
| BANDO | 680081 |
| CARQUEST | 38517 |
| CONTINENTAL AG | 49517, 49027 |
| CUMMINS | 3924026, 3929428, 3930269, 3930769, 3934814, 3934815, 3934816, 3936197, 3936198, 3957433, 3976833, 3978021 |
| Continental Elite | 49517 |
| Cummins | 5270678 |
| DORMAN | 419-375 |
| DYNACRAFT | D1186-2419 |
| Duralast | 89490 |
| FRESH START | 49517 |
| GATES | 38517, 38075 |
| GOODYEAR | 49517 |
| GOODYEAR BELTS | 55907 |
| LITENS | 910007A |
| Litens | 910007 |
| NAPA | 38517 |
| NAVISTAR | FLT689490 |
| SKF | VKM910007 |
| TENDECO | 910007 |
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