1997 Case IH 4812 for sale in Owosso, MI. 48 Foot. Case IH Concord 4812 air seeder with 2300 pull-behind tank. Always stored inside. Tank and seeder both in excellent condition. Has not been used in 8 years. Has double manifold, but never used fertilizer with it. Case IH Concord 4812 Air seeder with 2300 pull-behind tank. For more information, please contact George at 989-277-1414.