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I just cleaned, re-greased mine in my 91. There are 4 issues. First, the tracks are not aligned properly. Second, Low battery voltage. Third, old (waxy) grease in the channels. Forth, old grease in motor/cable assembly.Mine turned out to be combinations off all of them. Used brake clean and an old tooth brush to clean all the old great out. Re-greased with a thin coat of marine bearing grease. Took some time to re-align the tracks and motor assembly. They zip up and down nicely now.I have seen in some cases where the motor assembly needs to be rebuilt. Mine were not to bad to start with...Jeff
I just cleaned, re-greased mine in my 91. There are 4 issues. First, the tracks are not aligned properly. Second, Low battery voltage. Third, old (waxy) grease in the channels. Forth, old grease in motor/cable assembly.
Mine turned out to be combinations off all of them. Used brake clean and an old tooth brush to clean all the old great out. Re-greased with a thin coat of marine bearing grease. Took some time to re-align the tracks and motor assembly. They zip up and down nicely now.
I have seen in some cases where the motor assembly needs to be rebuilt. Mine were not to bad to start with...
Jeff
