The wheels on the rack adjuster assembly of the Maytag Quiet Series 300 Dishwasher seem to be poorly designed. In under three years of use, we have broken four of them -- even one within the first two months of operation.
Another wheel just broke, and I'm now out of spares supplied by Maytag during the warranty period. So, here's my hack to reattach the wheel and keep it washing dishes.
Step 1: Broken Wheel Bushing
Here's the wheel, broken wheel bushing, and a working one showing how it normally attaches. The crack you see here is the same way the others previously broke.