The other morning when my wife went to open the garage door, it started
to work, then the chain popped off the gear (which is on a spindle that
sticks up out of the unit).
I managed to work the chain back on and the same thing happened again.
Then I noticed the tensioning bolts on the chain, so figured the chain
had loosened just enough so that it was slipping off when the opener ran.
I tightened it up so that there was no slack in the chain, and figured
it would work like a charm. Instead, it raised the door a few inches,
like before, and then the spindle holding the gear that turned the chain
just sheared right off.
The torsion springs are fine, and you can open and close the garage door
by hand with no problem - so it's not like the opener should have been
I'm not sure what to do now. It was cold and not too well lit in the
garage, and I had my 2 yr old loose in the house, so I didn't want to
spend too much time investigating, but I did not immediately see how it
would be easy to open the unit and replace this spindle/gear (if in fact
it can be replaced).
The other thing is it may have been something else (other than slack in
the chain) that was causing the problem in the first place - and
tightening the chain just transferred the effect to the spindle causing
it to shear. If the problem still exists, and I just replace the
spindle/gear, I could easily snap it off again.
I don't know how old the opener is. We bought the place 5 yrs ago. I
did have to replace the torshion springs (one of which snapped) about 3
Before I snapped the spindle off, when the chain was off the gear, it
seemed to spin around just fine.
Is replacing the spindle/gear an easy (possible) job? Should I be
thingking about replacing the whole unit?