Fuel injection pump. 201 engine. Tractors: 4000 (3 cyl), 4500, 4600, 4610. Industrials: 555B. Replaces D0NN9A543K. Reference number CAV3233F390. To assure proper fit the Mfg #s number on the old part must match the Mfg #s on the new replacement part.
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