BradMM wrote:
....
for 2 1/2 years but started getting cock-eyed as it went up and down
and would stop and change directions. It's gotten progressively
worse. I've posted this recently so this is a repeat.

Four possible problems:
1. springs need replacing
2. rollers need replacing
3. garage/house has shifted due to drought
4. some combination of the above
5. Needs adjustment/alignment and lubricating is (probably) all

Whichever side is high is either binding or the other side spring is
weak relative to (or some of both).

In cold weather lubrication is more of an issue as old grease gets hard
and stuff binds more.

Springs can be adjusted; I'd start w/ the lube/cleaning and make sure
there's nothing binding/rubbing from 3) above and then go from there.

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