I read our 14T manual every time that I worked on the baler, especially the knotters. After I got out of college and went to work as a district manager for AC, one of my dealers took in a 14T on trade that was really messed up.
Working from memory, I had him take the bent needles over to the JD dealer and have the needles put back into the original curve (using a new needle for a pattern) in the press. The needles are made of maleable iron and designed to be bent for correct adjustment. I retimed the baler and adjusted the knotters for the dealer and he kept it to rent out to his customers for baling straw and hay. It turned into a money maker for that dealer, who was thinking originally that he'd just scrap it.
The frames and some of the components of the knotters are also made of maleable iron so they can be bent to adjust to correct tolerances. The wiper arm is adjusted by bending to achieve correct clearance, but some adjustment of the wiper is also by washer(s) on the shaft.