www.apairinc.com is thew web-site for reference.
http://www.apairinc.com/part2.asp?machine=TRACTOR&brand=CATERPILLAR&model=85C is the page you're looking for.
Really, AC is just a collection of Sanden, Nippo, Parker etc. parts. These guys just get the parts.
Luke
Cat 85 C Parts
