Planter Troubles

I have a John Deere 7000 corn planter. Every year we have had a different set of problems to work on. This year a belt has decided to malfunction. This planter is a six row planter so, naturally, it has six planter hoppers. Each box has one of these belts and yesterday they started breaking. I made three trips to Phillips Equipment for parts. I don't know why they are breaking... Wore out I reckon. Another belt broke today but I finished the field anyway. I pretended I was using a five row planter instead of six. The hopper that wasn't working was on the outside of the planter or one on the end. Another trip to Phillips before I start planting again.