Replace this seal when replacing the piston / cylinder kit, and if air is leaking from the head at the outlet.

Old Part Numbers: Z-A08548, Z-D29777Broken valve causing slow pump up or no compression at all? Replace this valve plate kit to restore compression (make sure piston and cylinder are not worn as well). NOTE: The D30139 Gasket Kit must be...

Old Part Numbers: A19714, D27022Check Valve, 1/2" male NPT x 1/4" hose barb. If your compressor constantly leaks after it shuts off, this is probabably the problem. If this one-way check valve is clogged or defective, air will backfeed from your tank, so...

Part of piston/connecting rod kit.

Old Part Numbers: Z-A04615, A16342, Z-D23584, N036515SV, N039790Pump and motor assembly for air compressors (does not include plastic cover or pump head). NOTE! The four bolt holes in the base of the pump, where the valve plate and head bolt onto,...

Old Part Numbers: KK-4930, KK-4949Order this kit if replacing the N017592SV Valve Plate Assembly. Used on many Craftsman, DeVilbiss, DeWalt, and other units. If the compressor pump doesn't seem to pressurize as quickly as it should or is leaking in...