Quote:
Originally Posted by HyperMOA
No, that is wrong. If one is pushing up, and another down, there is no advantage. They are wound opposite ways as they face different directions on the same axel. They both assist in lifting the door. They basically hold the weight of the door so a small motor can move a heavy door effortlessly.
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Bingo, it’s not that hard of a job. There is usually a line painted on the spring. Depending on the size on door there is either one spring or two springs and about 8 to 10 wraps on the spring and then lock the set screws. When your ready to tighten the set screws just make sure the one piece of rebar that is in hole on the end of the spring adjuster is resting against the wall and then tighten the set screws then use the other piece of rebar that you were using to tighten the spring put it in another free hole and pull down on it to get the piece of rebar that is against the wall out of its hole on the adjuster on the end of the spring.