One New Aftermarket Replacement Fuel Sending Unit Fits Ford TractorsThis aftermarket replacement fuel sending unit Fits Ford (Fits Ford/New Holland) tractors produced from 1958 to 1964, including gas and diesel models with 6-volt or 12-volt electrical systems. The unit mounts in the fuel tank and transmits fuel level readings to the dash gauge. Important: This sending unit will NOT work with original OEM Fits Ford fuel gauges. A replacement aftermarket gauge is required. Gasket B9NN9276A (sold separately) is recommended for installation.Specifications Length: 8-3/4 inches Resistance Range: 14 - 122 Ohm Compatible with 6-volt positive ground and 12-volt negative ground systems Will NOT work with OEM fuel gauges -- requires aftermarket replacement gauge Compatible ModelsFits Ford / Fits Ford New Holland (1958-1964, gas or diesel): 501, 541, 600, 601, 611, 620, 621, 630, 631, 640, 641, 650, 651, 660, 700, 701, 800, 801, 811, 821, 841, 851, 861, 871, 881, 900, 901, 941, 951, 961, 971, 981, NAA, 1801, 4000 (4-cylinder), 4030, 4030 (4-cylinder), 4110, 4130, 4130 (4-cylinder), 4131, 4140, 4000SU (4140), 4110TRReplaces Part Number(s):310940, 310941New aftermarket replacement part - not remanufactured, not used.