Liftmaster Garage Door Trolley Jammed Into Stop Bolt

The trolly was parked where the door would normally remain closed.

Liftmaster garage door trolley jammed into stop bolt.

When i pushed the button the door began to open but it didn t stop and hit the stop bolt causing a lot of stress on the chain. A problem came along after the assembly was complete and i tested the garage door opener. Get shopping advice from experts friends and the community. I decided to unbolt the chain from the trolley to allow the opener to move again.

When my craftsman garage door opens up it goes all the way up until the trolley hit the safety pin. Once it topped out the opener stuck there. 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. Typically this is caused by a mis adjustment.

My 10yr old house has a sectional aluminum door and a 1 2hp craftsman garage door opener. See how to get the trolley off the stop bolt or stop tab. Recently it opened all the way until the trolley hit the bolt that stops it from going any further. Eventually it becomes a problem with driving the door into the ground or in your case driving the trolley up onto the bolt.

When i disconnected the door it seemed to open and close by hand smoothly. The garage door has opened and will not close. We design and engineer residential garage door openers commercial door operators and gate entry systems. Back off the uptravel limit screw 2 turns.

The trolley can become lodged against the stop bolt tab because the door has either opened or closed too far. Loosen the chain or belt to relieve the tension then press the door control to run the trolley to the close position. Opener trolley is stuck against the rail stop bolt. What you need to do is back off the uptravel limit adjustment.

Do you know what i need to do to limit the movement of the door model 139 53650srt craftsman.