I suggest first determining if in fact it is the sender. At least on my tractor, maybe the dealer or another member can validate this for your tractor, you disconnect the 2 wires at the sender and touch them together and the gauge should go to full. You can do this test with the tractor off and the key in the run position.
Using the part number Beenthere LVA17266 supplied at greenfarmparts.com it is $70.68.
Using the part number Beenthere LVA17266 supplied at greenfarmparts.com it is $70.68.