Load adjusting needle, complete assembly, for Zenith carbs off JD 3010-4020 tractors. This is the side mounted version. That means the location this needle screws into is located on the side (block side) of the carburetor. This complete assembly will replace the JD# AT30178, AR80564, AR52452 or Zenith B75-14, A75-19 electronic solenoids. The complete electronic solenoid is unscrewed from the carburetor and this new manual load adjusting needle assembly is screwed back into the same location. Thread pitch is 1/2-20. You will also need a JD-48 gasket, sold separately in Key 42.
