Old Part Numbers: Z-D20596, D20596OEM pressure switch, 145/175 PSI. This switch replaces the Z-D20596. Replace the Pressure Switch if the unit doesn't cut on or off at the designated pressure the unit is set for. If the unloader valve is leaking on the...

1/2" compression nut and sleeve, brass.

Old Part Numbers: 69DCAUnloader valve used on many Furnas/Hubbell brand air compressor pressure switches; includes the unloader valve with compression nut and sleeve, and screw. Replace this part if it leaks while the unit is running. If this part leaks...

Oil breather assembly for the B5900 air compressor pump.

Old Part Numbers: ABP-8226502This air compressor running gear kit includes the piston, connecting rod, ring kit, and c-clips for High-Pressure (small cylinder) side only. Don't forget to install new gaskets as well.

Old Part Numbers: ABP-459, Z-ABP-459, 040-0210, 4116090137B5900 Two-Stage Air Compressor Pump Replacement. Includes flywheel, aftercooler, and air filter assembly. Note: If your old B5900 does not have an aftercooler, please purchase the B5900AAK...

Old Part Numbers: 1000298, 9013013Air compressor connecting rod insert. Note: For T39/B5000/B5900 model pumps, order 2 of these if replacing one rod and order 4 of these if replacing both rods.