Abstract: A lubricant seal assembly has an outer seal component and a separate inner wear sleeve. The outer seal component has a carrier and a PTFE seal element which lays down against the wear sleeve to provide a seal collar extending to an oil side of the seal assembly. The wear sleeve is formed on an air side of the assembly with an end flange, but is free of any such flanges on the oil side. The end flange has an axial portion extending into the seal component to define a labyrinth debris exclusion path. One or more elastomeric debris exclusion lips are formed on the carrier and are precisely positioned relative to the wear sleeve with the aid of an installation tool that engages end faces of the seal component and wear sleeve to press them into precise axial alignment relative to one another in repeatable fashion.