Allis Chalmers D10/D12 Tachometer — Up to SN: 9000 (4-Speed Transmission)

Replacement tachometer for Allis Chalmers D10 and D12 tractors — fits units up to SN: 9000 equipped with a 4 speed transmission. Serves as a direct swap for the following part numbers: 232177, 232189, 232176, 70232189, 70232176, 70232177. Unit bears the AC logo. Physical dimensions: housing outside diameter 3.330" and clamp inside diameter 1.500".