Champion Z9109 Complete Compressor Pump Ring Set

Z9109 is a Champion Complete Compressor Pump Ring Set designed for the R40A two‑stage pump, packaging both piston‑ring components needed to rebuild the pump in one OEM kit. It includes the Z9087 Low‑Pressure Piston Ring Set and the Z9088 High‑Pressure Piston Ring Set, the two parts referenced as items 44 and 49 in the R40A pump parts list. This OEM kit is intended for Champion Gardner Denver LP 40/70 pumps, including the R40A model, and is used during pump rebuilds to replace worn rings on both stages and restore compression performance. In official parts documentation, Z9109 is described as the Complete compressor pump ring set, consolidating the rings required for both stages of the R40A pump.