Garage Door Trolley Hits Stop Bolt

Was programed and working fine before today.

Garage door trolley hits stop bolt.

When my craftsman garage door opens up it goes all the way up until the trolley hit the safety pin. 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. The key is that when the garage door opens or closes the centre limit contact moves up and down the centre white plastic drive gear screw. First visually verify that the trolley is against the stop bolt make sure the garage doorway is clear of persons or obstructions release the door from the garage door opener by pulling the emergency release handle manually bring the door to the closed position loosen the chain or belt by adjusting the outer nut 4 to 5 turns.

Turn it to the middle position yellow line in fig. Trolley on garage door opener hits stop bolt and clicks 10 times. Do you know what i need to do to limit the movement of the door model 139 53650srt craftsman thanks. Stop bolt to remove the trolley from the stop bolt follow the steps below.

Your on the right track when you loosen the chain to get it off the stop bolt you are changing the limits. It is a craftsman 3 4hp model 139 53918d.