Center bowl wear liners for railroad cars with varying hardness values

摘要

A wear liner for use in a railroad freight car between a truck bolster bowl and a car body center plate comprises a non-metallic wear liner bowl which has a horizontal bottom floor, and an upstanding circumferential side wall extending upwardly from the periphery of the bottom floor to a top flange which forms an upper rim. A sealing member extends outwardly from the upper rim and has an upper lip which extends outwardly and upwardly to contact a base shoulder of the center plate. The sealing member also has a lower lip that extends outwardly and downwardly to contact a top shoulder of the truck bolster bowl. The floor and circumferential side wall of the wear liner are made of a harder synthetic resin plastic material than the synthetic resin plastic material of which the softer sealing member is made. The composite sealing member lips are outboard of the side wall of the car body center plate and the truck bolster bowl so as to be out of the way when the center plate is being lowered into the truck bowl.