Garage Door Opener Parts Question: Chain Adjustment
The chain on my garage door opener is sagging and rubbing against the track. How can I fix this?
There are a couple ways you can tighten the chain.
First look for an adjustment linked to the chain or an adjustment to the length of the door opener track. Both adjustment types should be done with the door closed and disconnected from the opener using the emergency release.
Adjustments on the chain are located at or near the master link where the chain engages with the cable. These usually consist of a bolt with two or three nuts, one or two for locking and one for adjusting. You loosen the locking nut, and turn the center nut clockwise to adjust the excess slack from the chain. Do not tighten the chain too much. This will cause premature wear on the chain rollers. Adjust it tight enough so that the center of the chain sags about 1/2 inch down from parallel with the track.
The second adjustment is located on the top of the opener body (usually associated with Staleys chain). There is a bolt that is turned clockwise to actually extend the length of the track, thus removing the slack from the chain. Same rule applies concerning recommended chain slack. One thing about this second adjustment is that if the body of the opener is mounted in a very rigid fashion and has no “give”, the tubular track will bend when you try to make this adjustment. So, you might have to loosen the mounting bolts or make other adjustments to the mounting assembly to allow the adjustment.
Hope this helps. If you do need more information about buying parts online go to help the help buying garage door opener parts online section.
Tags: adjustment, bolt, center nut, chain, garage door opener, locking nut, mounting assembly, track