Bower MU1309CBV1 Bearing Cup

The Bower MU1309CBV1 Bearing Cup is the outer race in Bower's MU1309 differential-bearing family, designed to sit in the axle housing and pair with the MU1309CBVV1 inner ring to form a matched bearing set. This outer race provides the correct race geometry to support the differential's rotating elements and maintain proper gear engagement under load, making it a critical component in differential rebuilds for heavy-duty equipment. In catalog data, MU1309CBV1 is grouped with MU1309CBVV1 (Inner Ring) and is documented as part of rebuild kits that source both ring components under the same industry part number MU1309CBVV1, helping ensure compatibility across the bearing family. Typical applications include heavy-duty trucks, construction equipment, and agricultural machinery that utilize differential axles requiring precise outer race seating for reliable long-term operation. When replacing, use the MU1309CBV1 Bearing Cup with the corresponding inner ring and the standard kit components to restore proper preload, alignment, and load distribution in the carrier assembly. Buyers should verify compatibility with their MU1309CBVV1 kit or their vehicle's differential model to ensure correct bore and face dimensions as specified in official documentation.