rebuild it
consider purchasing the basic top lid kit which includes gaskets and piston (not the cylinder)
paint and apply decals in an easy to follow format
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Basic Carburetor Kit for Allis Chalmers tractors with Zenith #s: 9707 or 10981
Economy Carburetor Kit: JD 3010, 3020, 4000, 4010, 4020 Ford 600 Hydraulics rebuild itEconomy carburetor repair kit for Zenith carburetors: 12510, 12879, 13023, 13209, 13320, 13326, 13429, 13430, 13450, 13638, 13750, 14990, 15099, 15107, 15108. These carburetors are often found on JD 3010, 3020, 4000, 4010 and 4020 tractors as well as the MM G940; Oliver 1800, 1850 and 1855 and Massey Ferguson 1100 tractors. This kit includes gaskets, needle and seat.