New Aftermarket Voltage Regulator for Tractor. Used on Ford 2000, 3000, 4000, 5000 Tractors with the Lucas Generator system. If your original generator has the tach drive on the rear of it, this is the voltage regulator you need. Also fits Lucas C40 and C40t generators on Ford tractors. Also fits Mg and Triumph applications. 12-Volt, B-circuit, negative or positive ground. Terminals: negative - armature - light - field - positive - positive. Replaces part numbers: Ford 105E-10505-c, 3004E-10505-a, 622E-10505-a, 71Ab-10505-ba, C5nf-10505-b, C7nn-10505-b, C7nn-10505-c, C7nn-10505-e, D0nn-10505-a/ Lucas 37207, 37279, 37292, 37297, 37299, 37304, 37323, 37330, 37334, 37336, 37342, 37344, 37346, 37362, 37367, 37368, 37382, 37391, 37392, 37451, 37452, 37471, 37472, 37477, 37528, 37529, 37542, 37543, 37544, 37547, 37559, 37562, 37563, 37568, 37569, 37570, 37571, 37572, 37573, 37576, 37597, Lrc111, Lrc113, Lrc119, Ncb130, Ncb131, Ncb132/ Massey Ferguson 1888-435-M1, 884-858-M1/ Perkins 2872706, 2872710.