What is this part of a Gillig Phantom?
Hi, I'm looking at buying a 2002 30' Gillig Phantom Transit Bus. There was one part with significant rust directly behind the rear driver's side air bag. Attached in the 1st picture. What is this part, and its functionality? The seller (who seemed knowledgeable) admitted to not knowing what it was for.
Also, while I'm at it, is it normal to see so much oil accumulating under the engine? See 2nd & 3rd pic.
Thanks for any help / advice!