Someone gave me a junk 5hp, 30 gallon one time. I thought I would give it shot since I wouldn't be out anything. They're easy to "refresh". Disassemble the compressor head and remove the reed valves from the plate. They typically get gunked up and corroded here. Use scotchbrite and carefully polish the reed valves and seat being carefull not to bend the thin reed valve or score it. I used a ball hone and gave the cylinders a quick pass or two to break the glaze and reseat the piston rings. Trace the head and valve plate to cut some new head gaskets from a sheet of Form-A-Gasket material. Clean it all up and reassemble with a new can of compressor oil. Total cost was $8 and mine will pump to 160psi with no problem.
Trying to patch a rusted out tank is big NO NO. Put the good compressor on the good tank.
Trying to patch a rusted out tank is big NO NO. Put the good compressor on the good tank.