Patent ID: 8272333

Claim:
The combination of a bearing adapter and an auxiliary centering member for a railroad freight car truck, wherein: the bearing adapter has an underside for seating upon a round cylindrical casing of a railroad car truck wheelset bearing; said bearing adapter is shaped to nest between a pair of opposed sideframe pedestal jaws of a sideframe pedestal of a railroad car sideframe; said bearing adapter has an upwardly facing surface for engagement with a sideframe pedestal member of the railroad car sideframe; said upwardly facing surface has a rolling contact surface for rolling contact engagement with the sideframe pedestal member; said auxiliary centering member is shaped to seat between said bearing adapter and said sideframe pedestal member; said auxiliary centering member is resilient; said auxiliary centering member is operable, when installed, to act on said bearing adapter to urge said bearing adapter upwardly facing surface to a centered position relative to the sideframe pedestal member; and as installed, rolling contact engagement of said upwardly facing surface of said bearing adapter with the sideframe pedestal member is unimpeded by said auxiliary centering member.