New OEM BK119 Two-Stage Air Compressor Pump, complete with Flywheel, Air Filter Assembly, Oil Sight Glass, and Crankcase Breather. NOTE: This is the replacement pump for the 8422HBK119 model air compressor. Need oil? Click here for synthetic and...

Old Part Numbers: 630-413153004Poor performance or air leaks out of the intake filter while the unit is running? The valve plate assembly is probably the problem.