Old Part Numbers: 165-0265Overhaul kit for the 3-piston 040-0353 air compressor pump used on DeWalt and Porter Cable units, includes valve plate assemblies, gasket kit with oil seal, piston ring set, and air filter elements.  If you have a sudden...

Air compressor valve plate assembly. Poor performance or air leaks out of the intake filter while the unit is running? The valve plate assembly is probably the problem.