Valve Guide Fits John Deere Models Replaces T556TOne New Aftermarket Replacement Valve Guide Fits John Deere Tractors, Combines, and Power Units This intake and exhaust valve guide Fits John Deere (Fits JD) engines used across the 1010 and 2010 series tractors, combines, and power units. The valve guide is pressed into the cylinder head to center each valve stem, maintain proper valve to seat alignment, and prevent oil from entering the combustion chamber. Eight (8) guides are used per engine. This