John Deere 3520 tractor capacitance fuel sender repair

This is a hands-on DIY repair diary for a dead fuel gauge on a cab-model 3520, diagnosing the wiring versus the capacitance fuel sender itself. It walks through dropping the fuel tank (removing step, wheel, and mounting bolts), tapping wires to isolate the fault, and swapping in a new $530 capacitance sender, plus a look inside the failed unit's circuit board. Useful for owners tackling the same repair themselves.

Posted by the PFC Kamphuis channel, an owner working through the repair on his own tractor in real time.