I am trying to install a new timing set, but I'm having a problem getting the timing cover off. I have everything stripped down to the point of almost taking the cover off, but there is a piece on the end of the crankshaft that I cannot get off. It is a triangle shaped bracket that the crank pully bolts on to, and it looks like it's made to be taken off with a puller. I have a puller on it right now that looks like would have no problem getting this thing off, but I have a ton of pressure on it and it has not moved a bit. I'm only asking about this because I'm afraid of braking something. Is there something else that I need to do? All opinions are appreciated. Thanks!