Old Part Numbers: K31Gasket in between the crankcase and the cylinder. If the compressor pump doesn't seem to pressurize as quickly as it should or is leaking in between the head, valve plate, cylinder or crankcase while running, there's a good chance...

Screw that fastens the front and back of the belt  guard to each other, and to the compressor base. THD FORMING

Old Part Numbers: 5130940-00, SSF-8080-ZNFlange nut to attach the wheel to the air tank.

Old Part Numbers: 5130171-00

Old Part Numbers: A16612, 5130066-00

Old Part Numbers: 5130210-00, 5130310-00