Serpentine belt squeaking?

how do I adjust. I just loosened tension on pulley to change water pump now I can't get it to stop squeaking. The long bolt that adjusts tensioner pulley turns real easy. I can turn it with my fingers. It seemed to be much harder to loosen when I took everything apart to replace water pump. Am I missing something that I didn't re-assemble correctly. This in on a 1997 Jeep 4.0.Serpentine belt squeaking?loosen the bolt on the tensioner pulley, tighten the jack screw to where the belt barely deflects when you push on it, and tighten the bolt

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