Garage door cable unwind at top-help!

[Red465]

I have a 7x9 non insulated aluminum garage door with a broken spring. The last spring was a pro replacement and he used 218x2x23. It never seemed right because the other same doors have 33in springs

I bought a green 243x2x30.5 and did 31 turns but it ran very hot. Whenever I reduce to a neutral weight the cables unwind at the top of the travel. The travel is no more than the other same doors (I have two separate singles)

Please help

 

[nickelTwin]

How did you decide that the spring you bought was the correct size?

Springs sizes for overhead doors are chosen by door weight and height.

It sounds like you chose the wrong spring size.

If you are not sure what the correct spring for that door is. You need to weigh the door.

 

[nickelTwin]

I think your new spring is probably too strong and you might be running out of winds in your spring

 

[Red465]

Thanks for the replies. I just weighed the door and it's 85lbs. I'm having trouble finding a garage door by weight table to confirm spring size.

 

[nickelTwin]

The spring you put on there now. 243x2x30.5

looks like for a 147-158 pound door

 

[nickelTwin]

assuming this is a 7 foot tall door.

the chart says .207 x 2 x 21 1/2" spring

 

[Red465]

The spring you put on there now. 243x2x30.5

looks like for a 147-158 pound door

So the spring was too strong requiring less windings which meant it ran out of winding at the top of travel?

Do you happen to know the proper spring size?

 

[nickelTwin]

seems like it

 

[nickelTwin]

as far as winding

 

[nickelTwin]

assuming this is a 7 foot tall door.

the chart says .207 x 2 x 21 1/2" spring

 

[Red465]

Thank you very much, I really appreciate it. Do you have a link to the chart?

 

[nickelTwin]

sorry, no
I read it out of a catalog at work

 

[Red465]

What does the catalog say for 218? Just want to double check what I'm seeing online. Thanks

 

[nickelTwin]

 

[nickelTwin]

 

[nickelTwin]

maybe this time I'll get the right one

 

[nickelTwin]

Best I could do at the moment

 

[Red465]

Thank you

 

[The Cobbler]

that's some great information

 

[nickelTwin]

Thanks

 

[dfiler2]

That is great info to have, thanks nickelTwin!

 

[petebob]

Hey, nickeltwin do you have a similar chart for a 10' tall door?

 

[nickelTwin]

No, sorry

I just have charts for 7 foot tall and 8 foot tall doors

 

[Red465]

Thanks again to nickel twin. The new spring worked perfectly. Correct size makes a huge difference, doesn't seem like much wiggle room.

 

[nickelTwin]

glad it worked out for you