The dimensions are closer for the arms but there is only one gear housing next to the crank shaft and mine has one on each side. I don't know if this makes a difference, since there is no gear under one of them.
If there is no gear under one of them, then I do not think it would make any difference. The empty gear housing probably only exists on both sides for ease of manufacturing; rather than making two kinds of operators with one housing on either side, they could just make one operator with both housings to cover the gear as necessary.
Hi,
I have a casement window that won't open because the gears in the crank are stripped. I was able to find the model number on the part, Truth Entry Gard L30841 and 20310. I'm looking for a replacement and I was hoping you would have one. I've attached a few images. Thank you very much, I look forward to hearing from you.