The Quincy QP-5 Air Compressor Pump is a replacement pump for 3 & 5 HP Quincy QP compressors. This fully pressure-lubricated two-stage cast iron pump delivers smooth continuous operation. Pressurized oil flowing to all critical surfaces results in less wear on the components. 2-cylinder configuration. Sight level oil gauge allows the pump to be monitored easily. Aluminum head for strength and heat dissipation. ASME-code interstage pressure relief valves. Graphite cylinder and head gaskets. Cast iron cylinders maintain rigid tolerances. Oil pressure gauge. Gerotor positive displacement oil pump. Spin-on oil filter. Industrial-class bearings for long operating life. Extra capacity oil reservoir. Two-piece connecting rods for easy service. High-efficiency fin and tube intercooler. Balanced counterweighted crankshaft for smooth operation. Efficient stainless steel valves.