Do a search using "racor cat" and you will find many threads referencing changing out the Racor fuel filter/water separator system to a Caterpillar system along with several reasons for making the change, i.e., leaking O-rings. It could be your coach has had the change made. In our coach, the Racor system was located in the far rear street-side corner above the coach batteries. When we had the Racor system removed, the Cat system was installed in the same location.
