Garage Door Maintenance

From Chamberlain bout maintaining their openers.
Thank you for that link. I figured out this part the hard way, nice to have confirmation:

Once every 3-4 years

Re-lubricate the garage door opener rail. Using a clean rag, wipe away existing lubrication from the center rail and reapply a small layer of lubrication. We recommend using a white lithium based grease for all lubrication purposes.

For those who don't have this system, there's a toothed belt the runs parallel to a T cross-section rail that runs from the opener to near the door. A shuttle runs along it that pulls up the door. Lubing that interface (while being careful not to get lube on the nearby toothed belt) is essential to keeping my 2 decade old door opener motor happy.
 
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