bhatiap had written this in response to
http://www.thestuccocompany.com/main...se-353086-.htm
:
Thank you all for the replies. My garage door opener doesn't have any
eye to detect any obstruction. I tried adjusting the screw at the
back and I can now get the door to close when the door is only about
2/3rds open (open just enough to let my Toyota Camry go through). If
I open it all the way then it doesn't close. It seems that it can't
get over the bend. Will try to lubricate and see if it helps. I can
see grease on the sping in the center but do I also need to apply
some sort of grease/oil on the track where the door wheels sit?

First disconnect the door from the opener by pulling the emergency
rope, then move the door manually through its entire range. It should
be balanced well enough that you can move it all the way up and down
with only a few fingers.

If it doesn't move easily, it needs to be rebalanced. If your door is
balanced, it's unusual. Most doors are _way_ off. They start off
balanced, but nobody has the door guy come out every year for a
tune-up. The opener works harder and harder as time goes on, until the
load is just too big to handle. That's when your problem appears.

You can find web sites that will walk you through the tuning process.
Most of it is pretty straightforward, like getting the tracks straight
and oiling the rollers, but the springs can be a bear. They can take
off your head if they let go at just the right time. I've had them make
holes in walls--nasty ones. (I don't mess with springs any more.)

As for oiling, get a spray can of lubricant that's designed for garage
doors. You put it only on the rollers and other moving parts, not the
track.

--
Steve Bell
New Life Home Improvement
Arlington, TX USA