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Old 06-21-2015, 12:52 PM   #1
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Newb w/question regarding gasket replace on Penguin roof a/c

I got this new to me 1996 Rexhall 34', and have been trying to become familiar with the systems, be cognizant of maintenance, etc.

I was watching a YouTube video of a guy replacing the gasket on roof a/c unit.

Part of me is thinking to leave it alone until (if ever) it starts leaking.

Thoughts? Anybody ever do it proactively, just because it was aging?

I just want to be on top of roof penetrations, not have issues.

Thanks
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Old 06-21-2015, 01:04 PM   #2
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Quote:
Originally Posted by John USA View Post
I got this new to me 1996 Rexhall 34', and have been trying to become familiar with the systems, be cognizant of maintenance, etc.
I was watching a YouTube video of a guy replacing the gasket on roof a/c unit.
Part of me is thinking to leave it alone until (if ever) it starts leaking.
Thoughts? Anybody ever do it proactively, just because it was aging?
I just want to be on top of roof penetrations, not have issues.
Thanks
John USA
The gaskets under both of my roof A/C units are 19 years old.
Tightening the A/C units down once a year... (to the inch/pound torque recommended in the owners manual), is the only "A/C gasket maintenance" I have ever done.
Mel
'96 Safari, (2 600 series Penguin roof A/Cs)
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Old 06-21-2015, 08:31 PM   #3
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I have a 94 rexhall airex only time i did more than checking the tork is when i changed a ac about 7 years ago
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Old 06-21-2015, 11:28 PM   #4
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Thanks guys...

I got my handy dandy inch pound torque wrench, and went out to do battle...

They were nowhere near specified torque (50 in/lbs...)

Maybe they were 15 in/lbs, if that...I had set the wrench to 20 in/lbs to start, and took a couple turns on the screws before I reached that set point.

I snugged em up, but only to 40. Book says the gasket should be compressed to about 1/2", and that's about where it is. I figure I got 10 more to play with in the future if I need it.

There had been no signs of leaking in the past, hopefully none in the future..
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Old 06-22-2015, 07:57 AM   #5
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We had our done on our '97 Mountain Aire as we had a leak in one of the AC units that has stained the roof after we purchased her.
I would suggest it on an older coach if you don't know it's history. I must admit I did not check the torque on the bolts after purchasing her, but after reading the forums on its importance, we decided to go ahead and have them replaced at our RV mechanics advice. Total job cost for 2 AC units was $100, but did read that it wasn't that difficult of a job for a DIY'er. Probably could drop cost down to bout $25/unit. I was working at the time and didn't want to take on that task.

You do realize that if they leak, Murphy's law states it will only leak during a wicked storm or when the RV is unattended!


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Old 06-22-2015, 09:18 AM   #6
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We had our done on our '97 Mountain Aire as we had a leak in one of the AC units that has stained the roof after we purchased her.
I would suggest it on an older coach if you don't know it's history. I must admit I did not check the torque on the bolts after purchasing her, but after reading the forums on its importance, we decided to go ahead and have them replaced at our RV mechanics advice. Total job cost for 2 AC units was $100, but did read that it wasn't that difficult of a job for a DIY'er. Probably could drop cost down to bout $25/unit. I was working at the time and didn't want to take on that task.
You do realize that if they leak, Murphy's law states it will only leak during a wicked storm or when the RV is unattended!
'97 MACA (Shurley)
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I have never found a RV mechanic who will recommend a $10 fix if/when they can sell you a $100 fix.
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