final few inches of window closure

A quick learner from kewanee il 61443 says:
our home was built in 1978 and the Pella windows are still in great shape. however i have three windows that seem to bind when closing at the last two inches when the bottom of the traveling windows makes conact with the window frame. a small nudge from the out side and the window slides into the winddow frame and the latch can be functional. there is a number 708 cc stamped in lower frame of the window near the cranking device. is there any adjustment that i can make to releive this problem? thank u in advance for your help in this matter.

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Paul from SWISCO responded:
Thanks for posting! Try this, remove the operator fully and try to close your window manually. If it still binds up on those last few inches, then it may be a problem with the window.

If not, then the crank gear may be stripped out, and you would have to replace the entire operator.
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