On Sun, 12 Jan 2020 06:08:10 -0800 (PST), trader_4
wrote:

On Sunday, January 12, 2020 at 6:38:15 AM UTC-5, wrote:
I have a 10 year old Liftmaster 1280/2280 Garage Door belt opener. The
belt wore out and was coming apart.
I Bought a new belt off Ebay.
I Removed the old belt.
I quickly found that my 90 year old legs wouldn't support me on my
stepladder.
I enlisted the aid of my younger neighbor.
I dunno what he did, but before he connected the new belt, he played
with the two 'up and down travel limit' controls on the side and the
two 'Force adjustmnt controls' on the back and messed them up.
Then he quit on me.
I need to try to correct the control settings. I want to reset them
back to their starting point. They certainly are not what they were
when we started.

Has anyone out there had to mess with this problem?
Maybe I need a 'professional' for this?
Thanks
Murphy


Did you Google for "Liftmaster 1280 Installation Instructions"?



Thanks for your response.
Yes -
There is a copy of the installation manual at
https://www.scribd.com/doc/268502784...een&from_embed
and other places of which I have had a downloaded pdf copy.
As I read it, the 1280 has two controls for door travel distance up
and down and two other controls for the force put on the door as it
goes up and down. It talks about one control knob turn equals 2" of
door travel.

The thing is - right now the new belt is not on the opener at all.
Neither is the old belt. Ergo, the 'gear' on the top of the motor is
not engaged. When I press on the remote to run the opener, the 'gear,
runs, naturally. But it won't stop (unless I press on the remote
again). That 'gear' always spins in the same clockwise direction tho,
so I fear that if the belt were connected to the 'gear' and the slider
on the track, the belt would break when when the slider reaches its
limit (ie the door is closed). And so, I fear to go on.

Help?
Murph