I removed the steering gear box from my '94 F-150 4X4 to put a seal kit in it. I can't pull the pitman arm off. I removed the nut and lock washer holding it on. I put a locking 2 jaw puller on it and literally beat on the puller bolt with a sledge hammer. I even repositioned the puller a couple times and repeated pounding. It won't budge. I can't see any way to put it in a press. What's the trick to getting it off? Thanks in advance.