I just received a new water pump. But there is no pulleys on the waterpump shaft. I tryed to get the Pulley off of the old pump. But I can't even press them off ( took it to three machine shops no luck). Should the new pump have came with a pulley attached? We received this truck without much knowledge of its parts history. So I'm worried that maybe the people that had it before. Welded the Pulley onto the shaft! Any info would be a help