Thanks, also id tag on tank says it’s 3 ph yet motor on it (magnetek 1745 rpm) is a single phase. Specs for that pump (similar to Saylor-Beall)looks to be 845rpm? any idea where to find owner/parts manual?Air filters are pretty generic, find what works unless you need original. Oil would most likely be 30wt NON Detergent. If you want to play safe, hydrostat test the tank.