74036340 New Front Crankshaft Seal Fits Allis Chalmers D21 210 220 7030 7040 +One New Aftermarket Replacement Front Crankshaft Seal Fits Allis Chalmers (AC) Tractors and Gleaner Combines This front crankshaft oil seal installs at the front of the engine crankshaft, behind the main crankshaft pulley, and prevents oil from leaking out of the timing cover area. It is a direct fit replacement Fits Allis Chalmers 670 series diesel engines used across the D21, 210, 220, and 7000 8000 series tractor lines as well as compatible Gleaner