crank assembly

A home owner from chicago says:
I have a LH exactly like the 39-094, my question is the worm gear removable on this assembly or is it attached with a clip in the housing as one assembly? I am curious as to what holds the worm gear in place. If this assembly comes apart I then assume the operator cover is the only assembly holding the worm gear assembly together. Thanks so much for this site, excellent layout that could not be matched in a quick search!
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Donna from SWISCO responded:
The operator itself does not come apart and cannot be repaired, only replaced. It sounds like the operator in question is broken if the worm gear has detached. The cover gently snaps onto the operator for a decorative finish, it does hold the operator together.
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