Eventually it becomes a problem with driving the door into the ground or in your case driving the trolley up onto the bolt.
Liftmaster garage door trolley jammed into stop bolt.
Back off the uptravel limit screw 2 turns.
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Opener trolley is stuck against the rail stop bolt.
Loosen the chain or belt to relieve the tension then press the door control to run the trolley to the close position.
The trolly was parked where the door would normally remain closed.
Typically this is caused by a mis adjustment.
See how to get the trolley off the stop bolt or stop tab.
Do you know what i need to do to limit the movement of the door model 139 53650srt craftsman.
A problem came along after the assembly was complete and i tested the garage door opener.
What you need to do is back off the uptravel limit adjustment.
Once it topped out the opener stuck there.
Chamberlain group cgi the corporate parent company to liftmaster chamberlain merlin and grifco is a global leader in access solutions and products.
The garage door opener motor will hum when attempting to open or close the door but is unable to travel due to being lodged against the bolt tab.
My 10yr old house has a sectional aluminum door and a 1 2hp craftsman garage door opener.
We design and engineer residential garage door openers commercial door operators and gate entry systems.
I decided to unbolt the chain from the trolley to allow the opener to move again.
The garage door has opened and will not close.
The up down limit screws are on the opener body with arrows above to indicate increase.
I have compared with the other garage door opener i have and it stops on the way up 1 2 inch before the trolley hits the safety screw bolt.
Recently it opened all the way until the trolley hit the bolt that stops it from going any further.
When i disconnected the door it seemed to open and close by hand smoothly.