Doctor Preload® is a product of Temper Axle Products Corporation, a company that has earned the trust of truck, bus and specialty fleets around the world. We are backed by parent company, Temper Corporation, a leader in specialized bearing adjustment solutions for over 40 years. The company designs & manufactures products for a wide range of applications and industries.
Doctor Preload® bearing adjustment tools allow your technicians to quickly and accurately adjust wheel end bearings to SAE standard light preload settings while measuring preload forces all the way through the adjustment process and at the final preload setting. Doctor Preload and Temper-Loc® Spindle Nuts are proudly made by hard working Americans in our Fonda, New York facility.