I just came in from working on cars, so now's a good time to answer.
My son pushed the button to turn on the door opener & I gave a real
gentle lift on the one side that opens slower. My guess is maybe only
10 - 20 pounds. I'm big so it's hard to gauge, but I'm definitely not
lifting very hard at all. Once the door gets past 6-12 inches , I can
stop lifitng and it will then go up the vast majority of the way on
it's own.

All of the rollers and pulleys have been oiled each year. Next time I
open the door, I'll watch the one side and make 100% sure all pulleys
are turning. That I have not done yet, but definitely will.

--George


On Sun, 22 Feb 2004 10:21:44 -0500, Roy wrote:

I checked the rails and they look good. I ensured the cables are on
the pulleys and the door still raises up the one side faster than the
other and jams. A spring imbalance seem to make the most sense.

--George



Are you sure you need new springs yet?
Ken.

Okay, you state that the "door still raises up the one side faster
than the other", which means that the spring tension on that side is
higher.... increase the opposite side's tension until the door raises
up "evenly" (by hand). The opener should not have to strain to lift
the door - that's what the springs are for.
Ken.

Or if the wheels and pulleys are rusted and are seized such that they drag
rather then turn, one side could drag enough to cause a jam. Has the rolling
gear been oiled every year ore at least lately?