What is the difference in the water pump for an Allis Chalmers C between one for a cast fan pulley and a stamped steel fan pulley?
The reason for asking is I think I got a stamped steel pulley, but the hub on the replacement water pump is about 1/8" too big diameter. The holes in both line up fine and both are star shaped. I have seen some water pumps for the Allis C where the hub is circular.
Maybe I just cannot tell the different between a stamped steel and a cast pulley, but it sure looks like a stamped steel pulley. It is a 1942 tractor (serial C12887)