Before you start the job, inspect your door thoroughly for any damage that
may have been the result of the spring's failure. Make sure the center
support is securely fastened, as well as the track's flag bracket, jamb
brackets and rear track hangers. Any discrepancies should be addressed
before you work on that spring.
If your door has only one spring and it is broken then you just:
1. Unbolt the stationary cone from the center support and slide it over
towards the drum.
2. Take note of the position of the end bearing plate, then unbolt the
bearing plate and slide it off the shaft. (You will probably have to tap
it with a hammer and wrestle it off due to indentations made on the shaft by
the set screws.)
3. Loosen the drum's set screws and slide the drum off the shaft.
4. This will be a good time to file down any indentations that you find on
5. .Slide the broken spring off the shaft.
6. Slide the new spring onto the shaft.
7. Slide the drum back onto the shaft.
8. Slide the end bearing back onto the shaft and bolt it down in the same
spot it was originally at.
9. Refasten the spring to the center support plate.
10. Go the opposite drum and ensure that the drum's set screws are tight and
that the cable is wrapped properly around the drum. Clamp a "Vise Grip"
onto the shaft so that it is up against the wall preventing the drum from
turning allowing the cable to go slack.
11. Go back to the loose drum reconnect the cable, turn the drum so that the
cable wraps securely around the drum. Tighten the drum's set screws.
12. Check both cable's tautness, they should be the same. Adjust as
13. Wind the spring with a couple of steel rods that fit securely and all
the way into the winding plug's four holes. There is a chart at
http://www.garagedoorsupply.com/torsionspringinstallation.html which will
tell you how many turns to wind your spring to. This chart is only a guide,
you must test your door's balance after the spring is wound and adjust the
tension as needed.
If your door has two springs that share the center support then you MUST
remove the tension from the spring that is not broken before you undo the
stationary cone from the center support.
As you may have realized by now, this repair is not rocket science. Anyone
can do it provided they have a little mechanical aptitude, use caution and
If you have any additional questions feel free to contact me.
===================================Garage Door Parts, LLC
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.