From informational videos to product manuals and troubleshooting articles the chamberlain group resource library has the information you need.
How to adjust chamberlain garage door chain.
Position ladder below the back or rear portion of the opener to access the screws.
You can adjust the open position using both the black button for open up movement and purple or yellow button for down close movement.
These usually consist of a bolt with two or three nuts one or two for locking or a nut and lock washer and one for adjusting.
Do not over tighten the chain.
Note adjustment screws are on the left side of garage door opener motorheads.
Just tighten enough to stop it hitting the rail.
This video demonstrates how to program the travel on a chamberlain garage door opener with a yellow learn button.
Sure the garage door opens far enough for your vehicle but not past the point where the bottom of the garage door is even with the header of the garage door opening.
If the up travel isn t functioning properly turn the up limit adjustment screw clockwise.
You loosen the locking inner nut and turn the outer nut clockwise to adjust the excess slack from the chain.
I am not a professional.
Documenting how i repaired the garage door.
The chain got loose and popped off the gear.
A flathead screwdriver is all that is needed to make a limit adjustment on most garage door openers.
Note one full turn of these screws equates to a door travel distance of two inches.
Replacement gear kit if you need one http amzn to 2drtdvc if you.
Remember to not over tighten the chain.
Establishing the travel limits of chamberlain garage door openers.