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Found a weird trick for a sticky door operator on a 90s Dover
The rollers were binding, so I tried a light spray of silicone on the guide channels, not the rollers themselves. It actually made the chatter worse until I cleaned it all off and used a dry graphite lube. Anyone have a better fix for that specific chattering slide?
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zara_kelly276mo ago
Wasn't there an old tech bulletin about the roller hanger brackets getting bent on those? I read a forum post ages ago where a guy had the same chatter, and the dry lube only helped for a week. He found the bracket that holds the roller was slightly warped, so it was making contact at a weird angle. Straightening that out and then using a tiny bit of white lithium grease on the channel finally fixed it for him. Might be worth checking the alignment before anything else.
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finleyw996mo ago
Yeah, that part about the bracket being bent is spot on. I fought the same chatter on a Dover last month and it was exactly that. The hanger was just a little off and no amount of lube fixed it. I did what umamartin said and cleaned everything really well first. After I bent the bracket back straight, I used a moly paste and it has been smooth ever since. The paste is way better than spray for staying in the channel.
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umamartin6mo ago
Clean the guide channels with a solvent first, get all the old grease out. Then try a moly paste on the slide, not a spray. The paste stays put and doesn't attract dust like graphite can. Had one last year that needed the rollers adjusted after the lube.
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