Rolair

Unloader line, from check valve to bottom of pressure switch.

Replace this if broken or frozen to crankshaft. If frozen to crank, remove, then polish crank and install new rod.

K17 pump assembly with flywheel. Up to 11.11 CFM with 3 HP motor. Cast iron cylinders. Reliable workhorse found on most contractor models. Save money by using your old flywheel and aftercooler...