Conventional belt tensioners use springs to hold their position and tension. However, springs can only flex so many times before they fail. PolyForce™ Belt Tensioners replace this spring with a longer lasting, new and unique Polymer Torsion Core. A compressed silicone replaces the spring, thereby eliminating the primary cause of failure.
The other common failure point in a belt tensioner is the bearing. The pulley bearing absorbs a huge amount of vibration and can often fail too soon. PolyForce™ Belt Tensioners have dramatically improved pulley bearings to give them extended life. Our bearing is designed specifically for pulley applications and features:
– Outer Ring Rotation
– Anti-Vibration Grease (won’t separate)
Its innovative design allows part number 638667 to be maintained, rather than replaced. Since it is made up of two individual belt tensioners, you only need to replace individual tensioners instead of the complete assembly, if the need should arise. The individual replacement tensioners are part numbers 638667-1 and 638667-3. The replacement idler pulley part number is TP-010.
GT38667, 38667, A4722000170, A4-72200-0170, 49603, 89498, EA4722000270, EA4-72200-0270, EA4722000170, EA4-72200-0170, A4722000270, A4-72200-0270, A4722000470, A4-72200-0470, EA4722000470, EA4-72200-0470, EA4722000570, EA4-72200-0570, A4722000570, A4-72200-0570, A4722000970, A4-72200-0970, EA4722000970, EA4-72200-0970, A4722001070, A4-72200-1070, EA4722001070, EA4-72200-1070, A4722001470, A4-72200-1470, EA4722001470, EA4-72200-1470,
You are purchasing a Kysor-style fan clutch. When replacing a Kysor-style fan clutch, you must always replace the hub (pulley) bearings at the same time. Failure to do so will void the warranty on your fan clutch.
To determine the required bearing kit for your hub, enter the hub part number in the search field below, find the part number of the bearing kit you need on the dropdown below, or click on the 'Learn More' link below.
Choose Your bearing kit (if known)
I don't want to purchase a hub bearing kit at this time.
Failure to install new hub bearings with your clutch will void your warranty.
This product includes a core charge. You may pre-pay for the freight to return your core during the checkout process, or ship using your own method. Core returns must be received by Kit Masters within 30 days of purchase.
Would you like to pre-pay for the return freight?