12V Fuel Gauge Fits John Deeree Tractor Models: 2520, 3020 (SN: 123000 & up), 4000, 4020 (SN: 201000 & up), 4320, 4520, 4620, 500A (Sn: 123114 To 152141), 500B, 5020 (SN: 25000 & up), 6030, 7020, 7520 Combine: 3300, 4400, 4420, 6600, 6602, 7700 Tech Info: for 12 Volt Negative Ground Systems Only. ACTUAL PHOTOSS OF GAUGE. Replaces Part Number: AR45436, A75294, Fits JDS776