"Old" is relative. The Rulon®-impregnated skid idler was an experiment started in late 1999 that apparently didn't work out so well. It was phased-out in January 2004. Last I checked, the replacement part is substituted back to a pulley. The skid idler requires a specific belt that has a backing material which picks up Rulon® particles from the skid for lubrication.

Wow,
Thanx,for the quick reply. I truly appreciate this. It was driving me crazy.
I can't believe that any design engineer would be that stupid,or listen to his boss to save a few pennies on a friction system destined for failure, especially over time.
Just the kind of "engineering" BP gets.