New Transmission Differential Bearing Retainer O-Ring for International and IH Farmall Cub and Cub LoBoy Tractors.

O-Ring fits BOTH left or right side of transmission differential gear case.

Case IH O-ring part number 285723R1.

These o'rings are typically found to be cracked, crushed, or brittle on disassembly due to age.  Reuse can result poor sealing and a slow leak around the bearing retainers.

This o-ring is also used in various other applications.