Replace part number: 30623. 2PCS #17399 plunger retainer o-rings. This Repair Seal Kit perfectly fits for CAT Pump Pressure Washer Pump 30, 31, 34, 35, 310, 310B, 310S, 310W, 340, 340S, 340B, 340W, 350, 350S, 350B, 350W Models.
30623 Seals Rebuild Kit For Cat Pump Pressure Washer Model 30/31/34/310/340/350
30623 Seal Kit Replacement Fits For Cat Pump Model 30 31 34 35 310 340 350 310B
#US Replace Part Throttle Governor Spring for DeWalt 4200PSI Pressure Washer Model# DXPW4240 (nvduq2803-21953)