This assembly is a pre-packaged set of components designed for use in specific trailer axles. It typically includes inner and outer bearings, a grease seal, and sometimes a cotter pin or castle nut. The numerical designation likely refers to a specific size or series within the manufacturer’s product line.
The reliable operation of trailer axles relies significantly on the proper functioning of this component collection. Correctly installed and maintained, it ensures smooth wheel rotation, reduces friction, and prevents premature axle wear. Replacing these components as a set helps maintain optimal performance and enhances safety by minimizing the risk of wheel failure during transport.