During the Palm Beach show, they recommended that we change the auxiliary air filter cartridge in the drivers compartment. I purchased a filter cartridge after the show and have been waiting for the right time to put it in.
Since the I had the air bled off for the replacement of the tag axle control lever, this seemed like a good time. When I opened up the filter assembly, not only did I get the cartridge but several other degraded pieces as well. Seems like this had never been replaced!
Talked to Prevost and the only sell the full unit and the cartridge. So I have new filter unit coming and will have a spare cartridge. The full unit was only $100
By the way, you have to push up on the bottom of the filter base to get it to unscrew from the head.