Caterpillar 6I-9722 Oil Pump Shaft is an original Caterpillar replacement part designed to drive the lubrication pump in select Cat diesel engines and generator sets. It transmits drive from the engine’s drive system to the oil pump impeller, enabling proper lubrication of moving parts within the engine. Cat Parts Store listings for oil pump shafts document a 71.05 mm outer diameter for the shaft and associate this product type with Caterpillar engine families such as the G3520 and 3516 series, among others. The 6I-9722 designation indicates an authentic Cat component intended for use in the Caterpillar lubrication system where this part number applies.
