A flathead screwdriver is all that is needed to make a limit adjustment on most garage door openers.
How to adjust chamberlain garage door chain.
This video demonstrates how to program the travel on a chamberlain garage door opener with a yellow learn button.
I am not a professional.
Remember to not over tighten the chain.
You can adjust the open position using both the black button for open up movement and purple or yellow button for down close movement.
Find the chamberlain garage door opener technical support you need to get your garage door opener operational.
This will cause premature wear on the chain rollers.
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.
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.
Note adjustment screws are on the left side of garage door opener motorheads.
Do not over tighten the chain.
You loosen the locking inner nut and turn the outer nut clockwise to adjust the excess slack from the chain.
Just tighten enough to stop it hitting the rail.
Documenting how i repaired the garage door.
From informational videos to product manuals and troubleshooting articles the chamberlain group resource library has the information you need.
Replacement gear kit if you need one http amzn to 2drtdvc if you.
If the door won t stay open to its full extent or doesn t close flush to the ground the travel control needs an adjustment.
The chain got loose and popped off the gear.
If the up travel isn t functioning properly turn the up limit adjustment screw clockwise.