I wonder if this is the issue I had on the N6 I drove last harvest. The last day we were cutting, the A_C fan in the cab started blowing fuses (I went through three before I stopped replacing them) and a couple of weeks later, one of the owners asked me if I ran through a bunch of green vines as the main clutch was partially burnt out. Consequently after wheat harvest was over, they cut garbonzo's with the same machine and it never acted up, granted it had cooled off a lot by that time.