This listing is for a Unitized Oil Seal used on heavy duty #99 spindles that install on the back of 9,000 - 10,000 lb Alko, Hayes, and Rockwell hubs. This oil seal has an inner diameter of 2.750 inches and an outer diameter of 3.784”, which will fit some Rockwell and Hayes 9k and 10k capacity hubs, but it is always a good idea to double check any seal numbers and measurements from your current seal to make sure you are getting an exact replacement.
A Unitized oil seal is a dual action seal because the inner part stays fixed on the spindle and the outer casing rotates with the hub. This seal effectively keeps the oil in your heavy-duty trailer hubs or drums, and prevents dust, water, and other intrusive materials from entering.
Features
- Unitized Oil Seal for #99 Spindle fits 9,000 - 10,000 lb Hubs
- 2.750 inch Inner Diameter
- 3.784 inch Outer Diameter
- Unitized Oil Seal Maintains Lubrication in Hub while Preventing Intrusion from Outside Elements
