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.