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Today, we're going to review part number 10-63. This is the Redline Unitized Oil Seal for
trailer hubs. A unitized oil seal is a dual action seal. The way it works is the inner
part which is this part right in here. It will actually stay fixed on the spindle and
this outer casing right on here will rotate with the hub. This type of seal has less wear
and tear and provides better leak protection. A unitized oil seal is mainly used on hubs
that will use an oil bath lubricating system. This particular part number is used on Dexter
8000-pound axles and their 9000-pound axles up until 10 of 1989. A few measurements on
this is the overall; our outer diameter on this will 3.376. The inner or inside diameter
measured right here would be 2.250. Also, if you go to the product page for this part
number, we will list a chart and there will be a seal cross reference chart.