antique centrifugal pump powered by gas engine|antique pump company 23 ADJUSTING SCREW 1 STEEL 22 R/V. CAP 1 C.I. 21 PRESSURE PLATE 1 M.S. 20 SPRING 1 STEEL . Sectional Drawing/Parts List Pump Model: SRP-25 PUMP SHAFT 36 23 22 40 21 . Subscribe