[carpdad]

First, I have 15" radius track, 6 1/2' door. 7 1/2' ceiling. I installed a pair of low headroom hinge which solved the headroom problem. I needed more for future insulating and drywall.
My question now is that I replaced the springs (pulley, rollers and cables). The wood door weighed 134 lbs on a bathroom scale. Knowing the scale is inaccurate and future repainting, I installed 150 lbs springs and the door is not settling to the floor.
When the new opener is installed, is this going to be a problem with the sensor that backs up the door when there is an obstruction?
If the answer is I should use closer weight springs, should I use slightly below 130 lb or 140? My reasoning was more weight springs would have been easier on the opener motor as well as a few times when I have to open it manually.
Thank you in advance.

 

[joed]

I'm not sure how door spring rating work but if each spring is 150 LBS then you installed 300 lbs of spring. Not sure if that is how it works or not.
The door needs to function properly before you install an opener. Too much pressure needed to close the door could cause the pressure sensor to think it hit something and reverse the door.

 

[firehawkmph]

Carp,
What kind of spring setup do you have, sounds like side extension springs due to your low headroom. You could loosen the tension up just a little bit to make it easier for the opener to seat the door the bottom of its travel. By doing that, it's going to make the door a little bit heavier to lift initially. An opener will tend to make up for a slight misadjustment. The newer openers don't have a force adjustment like the older ones had. Hook the opener up and give it a shot. If it acts like somethings in the way and reverses travel, then try lightening the tension on your springs just a little bit at a time. In a case like yours with low headroom, you can get an upper track with either a 10" or a 12" radius. The ten inch will gain you 5" additional headroom, the 12" will gain you 3" more, compared to the 15" track you have now. I usually reserve the double low headroom track for a last resort. You need 13-14" of headroom for a torsion spring setup. Much easier and more consistent to adjust the spring tension on. Let us know what happens.
Mike Hawkins:smile:

 

[carpdad]

Thanks for the replies. They are extension springs, and as far as I know, I bought the pair as 150lb, meaning each spring is good for half the weight. That is what I read also. BTW they are also shorter springs for 7' doors.
The door sits flat on the floor without the springs, so it looks like I got too heavy springs. I'll install the opener and see how it behaves.

 

[carpdad]

Another thought. It is possible I'm working with faulty first install. The side tracks were buried in the concrete floor after they were installed too tight to the door and old removed springs were actually 2 lengths. So I'm going to search for the proper length of the top tracks and see if present top track length is holding the springs back, therefore the door.

 

[firehawkmph]

Someone may have replaced just one broken spring in the past or both even, with what they had on there truck. May not have been correct. Can't always go by what was there. Did you try just backing off a little tension on the springs by hooking the s hook on the end of the cable in a different hole in the angle iron?
If you can't do it that way, then just add some slack by adjusting where the s hook is on the cable. Try an inch at a time.
Mike Hawkins

 

[carpdad]

I missed the tree for the forest. The eye bolt!:smile: Thanks for the idea.