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Question About Craftsman Garage Door Opener 139.53978SRT
greasing the chain. How do we grease the chain? ...

greasing the chain. How do we grease the chain? Sometimes the door goes up only 2/3 rds of the way? Might this be due to the chain needing grease? When we close it again and open it, it goes all the way up. What could be our problem?

Asked by cary on 03/30/2015 1  Answer

ManualsOnline posted an answer 9 years, 8 months ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

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