I am not confused by the tool....what do they mean by this..."position seal flush with end of hub." Do they mean the whole seal or the "shoulder" metal part to be even with back of the hub?
The entire seal needs to be completely seated and therefore none of the side of the seal can be seen.
I think what they are saying is don't drive home the seal crooked.
Well, I hope this is right. Here is a picture before I put the hub on. There was no seal on the left side and the right side seal was installed backwards by PO.
Here is how the proper seal works. Stan, that picture you posted is for some other seal I guess. My application is a 4 wheel power drum car...2 3/4" front and 2 1/2" rear shoes...'68 Newport.