K965963 Bottom Gasket Set K262747 Fits David Brown Models: 1594 1690 1694+One New Aftermarket Replacement Bottom Gasket Set for David Brown 6 Cylinder Tractors This bottom gasket set is a complete lower end engine gasket kit designed for David Brown tractors equipped with the AD6 55 and AD6 55T 6 cylinder diesel engines. The bottom set seals the lower engine assembly covering the oil pan, crankshaft, and related lower block components and is an essential part of any engine rebuild or overhaul on these models. Specifications