Parts Manual Fits Allis Chalmers AC Tractor Engine Models 23C OE138 ED40This is a page Parts Manual for the Fits Allis Chalmers Model ED40 Engine and is a MUST HAVE when ordering parts and doing repairs. The Parts Manual has exploded views of every assembly on the Engine with corresponding descriptions and OEM part numbers, which can be critical when ordering parts. Image your ED40's transmission in a parts washer with no view of how the pieces should fit together, or with no list detailing if you have all the parts. You