Keeping you Ready for the Road Ahead , the Kit Masters Kysor-Style Hub Bearing Repair Kit is purposed for rebuilding Kysor-style fan clutch hubs. New bearings paired with a newly installed fan clutch are essential in the prevention of vibrations in the rear air-seal, which causes air leaks and ultimately leads to premature failure. Prevent failure of your newly installed fan clutch with this heavy duty hub bearing repair kit. FleetPride is your First Click in Heavy Duty .