Patent ID: 7108452

Claim:
A very heavy duty replaceable wear cap assembly for mounting on a compaction roller configured for operation on a landfill compactor having a gross vehicle weight in the 70,000 to 120,000 pounds range, said roller having a cylindrical rim adapted for mounting and rotation upon an axle of said compactor, each heavy duty assembly comprising a base mounting pad configured from cast steel in a mass to achieve a 20,000 hour service life and including perimeter edge portions serving to receive weld metal to secure said mounting pad fixedly upon said cylindrical rim and a wear cap configured from cast steel and mounted upon said base mounting pad in a tight fit, said wear cap having fore and aft compaction faces configured when mounted on said mounting pad to be oriented in the direction of the compaction roller's rotation on the axle, said base mounting pad and said wear cap including substantially continuous exterior side walls disposed generally normal to the axle and the compaction faces, tightly engaged, exposed mortise and tenon lock joints in said exterior side walls configured so that the exposed tenon extends between said wear cap and said mounting pad in a tight fit connection that resists torsion forces acting on said assembly and resists twisting and rocking forces, and a spaced apart pair of fastener assembly means extending completely through the wear cap and mounting pad serving to fixedly secure together said wear cap and mounting pad, the engaged fit between the assembled wear cap and mounting pad being designed to be very tight such that the fit precludes, during said long service life, relative twisting and rocking movements between the wear cap and mounting pad, the fastener assembly means permitting later dismounting of the wear cap from the base mounting pad.