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Fri, Apr 24, 09 at 0:41
| I have a Craftsman model 139.53627SRT that has worked great till now.The chain jumped off of the sprocket. I reinstalled the chain and adjusted to leave a little slack and it jumped off again. The door moves freely when unlatched. Any help would be appreciated. |
Follow-Up Postings:
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- Posted by don_1_2006 (My Page) on Fri, Apr 24, 09 at 16:34
| This is generally caused by a bad bearing letting the sprocket lean forward and the chain jumps off. You can get the part at Sears or any opener service company. It is called a Gear and Sprocket assembly and the part number is 41C4220A. It should also come with instructions. |
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| Thanks a lot don 1. I will give that a try. fzrgerard |
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| Changed the sprocket assy and the door works great!! Thanks again don 1. |
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