343-4372 Stemco PSI Trailer Hub Cap & Gasket Oil Bath Hubs w/ HM518445 Bearings
STEMCO MTIS/PSI™ hub caps are available in both oil and grease hub caps for several popular applications. The oil hub caps (343-4370, 343-4371 and 343-4372) have a side fill plug and a standard window with oil fill lines. The grease hub caps (340-4370, 340-4371 and 340-4372) do not have a side fill plug and incorporate a gray opaque window with no markings. The PSI™ tee fitting and flapper valve are to be installed in the center of the hub cap and are available from Meritor or PSI™ as a part of the PSI™ system.