I have a Liftmaster Professional garage door opener...I think it is
Model 1255R. Well it stopped working the other day, my wife says
nothing unusual had occured. Motor turns, but door does nothing.
So I opened the housing and found that the plastic gear that drives
chain (I believe it is called Drive/Worm gear kit, part 41A2817) is
gone. Well, not gone...but the teeth are gone.
So I found the various sites on the net to order one. But what I can't
quite figure out is how do I get that piece out?