In the spring of 2017 I replaced the water pump on my Universal 5411 with an Oberdorfer pump. Today in preparing for the new season I replaced the impeller. Pretty straight forward except for the life of me I cannot get that split ring back on which holds the impeller on the shaft. The impeller is all the way in the pump body but the shaft doesn’t stick out far enough to put the split ring back on. Anyone have experience with this?