The Case IH 1901609 is a genuine standard main bearing set designed for a wide range of Case IH agricultural machinery. This essential engine component ensures proper crankshaft rotation and longevity. It is compatible with D-series engines including D-155, D-179, D-206, D-239, D-246, D-268, D-310, D-358, D-401, DT-239, DT-358, and DT-401. This bearing set is a direct replacement for maintaining optimal engine performance in numerous Case IH tractor, combine, and loader models.