I have a crank assembly that worm gear has pulled out. Anderson window logo has a 3-78 stamped on it. Assembly uses only two front screws to mount. Has white plastic gear on left side of unit. Finish plastic cover does not have screw holes in it. Window screen measures 21 1/2 by 31 1/2.
Can send picture of base with plastic cover and worm gear assembly off.
Also can measure length of arm that connects to window. You have an assembly picture that I am sure is the replacement I am looking for.
Do you have a suggestion for ordering and the price?