dhattaway
New member
I didn't do any measurements. The only indication of a problem was that the tachometer quit working.I'm chasing alternator problems on mine...also a 4520C, 2015 model year. Mine hits 20v, the alternator tests fine at a repair shop I found. There isno tractor indication of trouble, I found it when the tractor needed a jump and I started measuring voltage at the battery. There should be a single wire connection on the back that is for the tachometer I think, I don't see it in your pic. Did you measure the battery terminal voltage while running?