for Pump 30623 Seal Kit Replacement 30 31 34 35 310 340 340S 340W 350 350B
Remove the 2 piece seal retainer with wick and replace a new wick. Remove the plunger retainer and replace the old o-ring(the small one). 3pcs Plunger Retainer O-Rings(17399). Solve Water Leakage Issues : The seals may need to be changed if your Pump high-pressure cleaning pump pressure is low, water leak below the head or the pump is running rough.