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qianhuiz

11:05AM | 12/13/05
Member Since: 12/12/05
1 lifetime posts
Bvelectrical
Hi, Can any body help me with this problem.

I just changed the sprocket Coupler on my garage door opening system (Craftsman). It can only goes one way-open the garage door. It does not reverse.

If you can give me an advise, I really appreciate.

Thank you

Billhart

04:06PM | 12/13/05
Member Since: 04/25/05
1918 lifetime posts
Is this a chain drive, screw drive, or belt drive operator?

What happens when you try to reverse it?

What is the sprocket coupler.

Without know the details I suspect that you got the unit "out of sync".

That is that you the unit was up, but after you worked on it the chain, belt, screw was in the down position.

Try disconnecting the chain/belt/screw and run it without anything connected.

A couple of versions of the Chamberlain/Liftmaster (makers of the Sears units) you can do that with. Don't know if you can with all version or not. I know that some other brands you can't do that with.

Then you you have figured out which is full up or down then reconnect the chain/belt/screw so that it is the same relative position.


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