The Quincy QP-7.5 Basic Air Compressor Pump is designed for use with the Quincy QP 7.5 HP fully pressure lubricated two-stage air compressor. The oil pump is used for pressure lubrication to the crankshaft, bearings and connecting rods up to the wrist pins. Pressurized oil flowing to all critical surfaces means less wear on the components. Cast iron construction brings dependability and smooth operation.