Most likely the pump seals are leaking.

If the motor bearing is not rusted yet, you can fix it by installing a new impeller kit.

If the motor bearing is already rusted, you have to replace the whole pump & motor assembly.

In both cases the pump & motor assembly has to be removed from the dishwasher but you do not need to remove the dishwasher from the cabinet.

If you are going to fix the old pump - the gasket around the pump housing has to be replaced too. You do not have to order it if you replace the whole pump & motor assembly - it's included.

- The part number for the impeller kit is AP3115180

- The part number for the housing gasket is AP2908993

- The part number for the pump & motor assembly is AP3776341

Here are the break down diagrams for the Kitchen Aid dishwasher Model KUDM24SEBL1

Gene.

I would run the dishwasher to see if the motor bearings are bad. If they are, new motor time, if not, I have used a sharp wood chisel on the old impeller to bust it out. Post results.