Had issue every few pages where the exit rollers when pulling the paper back into to do the alignment, some pages would go back in skewed and cause a mess. I took the finisher apart and noticed the possibility of an issue with the rollers that lower down to pull the paper back in. There is an arm for each roller on a shaft that aids in lifting and lowering these rollers. These arms have a tab on the side of them that does this The arm closer to the front of the main unit seems like the tab does not stick out far enough in between good and not good so it works sometimes but slips off sometimes. If the tabs were longer it would not be any issue. I could not see anything wrong with each individual part in relation to this action. All bushing and parts seemed to be in place. There is some play in the shaft but I'm not sure what's normal. Is this a common issue to anyone. I looked through about 20 bulletins but the only thing I found was the arm was redesigned to help manufacturing efficiency. I didn't see anything in the change that could help this issue. I ended up using a suitable piece of plastic I had with a special plastic repair/welding powder and secure extra plastic to the part that the arm lifts to give it more to grab onto. Put it back into the main unit and works like a charm.
Sorry if my terminology or explanation is hard to follow. I don't yet have much experience with finishers.
Here are some pictures that show how the front roller can come into contact with its lower roller while the back side roller is not in contact with its lower roller. Also pictures of the white colored arms.
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