Rolair

Located between Intercooler which leads to tank and pump head. (for newer non-gasket style) (ea.) - not shown.

Replace this pin when replacing piston or rod.

Old Part Numbers: GA0250200BM, PG0250200BK1/4" MPT Pressure gauge for air compressor tank or regulator, 200 PSI. Buy a second one to ensure that you have a backup. 

For 4L (1/2") series belts.