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.

Garage door trolley hits stop bolt. Trolley on garage door opener hits stop bolt and clicks 10 times. 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. B if the trolley is in the middle of the rail and if it is at the top put it near the travel adjusting screw heads red line in fig b. Turn it to the middle position yellow line in fig.

It is a craftsman 3 4hp model 139 53918d. Do you know what i need to do to limit the movement of the door model 139 53650srt craftsman thanks. 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.

Was programed and working fine before today. Tried to reset opening travel distance but it keeps traveling to the stop bolt and clicking.