Dave Sr. from SWISCO responded:
July 25, 2017
I believe our 39-182 and 39-183 are the only choices for this old POW window operator. See what you think. Before installing a new operator, I suggest lubricating the linkage in the window with a type of silicone spray, then operating the window by hand to make sure there is nothing hindering the operation of the window. That could potentially be the only problem.
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