Marvin Crank Keeps Falling Out

Hey Erik. When that worm gear connected to the crank handle detaches from the operator, it unfortunately means that the entire operator has broken down and needs to be replaced. Can we see the entire assembly, including the link arm(s)? From there, we'll see if we can help. Many thanks. 

This looks like either our 39-031 & 39-032, or our 39-155 & 39-156. The only difference between these two sets of operators is the length of the link arm, so compare both with your old hardware to see what matches best. For a new folding handle & cover kit, see our 39-107FK.