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Old 01-05-2014, 03:01 PM   #31
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I am no engineer or welding expert, however I have spent 45 years fooling around in fiberglass boats. Brian Clemens said that motorhomes are designed to flex some. Flexing in some cases will cause gelcoat or fiberglass cracks. The first picture posted by Mountainman43 shows aluminum framework at the corner. It shows a clean space between what appear to be vertical and horizontal frame members with no jagged edges which I would think would result from cracking. If those frame members were not intentionally connected, and a solid piece is welded to connect them solidly. I would be concerned that this may cause rigidity in the frame not intended.
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Old 01-05-2014, 03:17 PM   #32
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All frames will flex a little welded even, but not to have a structure wall not welded at the seems to me crazy. At that point the fiberglass gel coat is only holding it together. The wall is 2" thick 1/8 or so on the outside compressed wood and gel coat, insulation and then another 1/8" or so on the inside compressed. No way that can hold a wall from separating or cracking. Fiberglass will show stress cracks just like on boats (spiders) this is a lot worst then spiders.
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Old 01-05-2014, 03:24 PM   #33
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Im just a retired AF cop, but I trust this service center to do the right fix. They have been working with FR and I think (hope) that should result in the proper repair.
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Old 01-05-2014, 09:36 PM   #34
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When I saw the photo I thought why was the corner aluminum frame not welded. I can't think of a reason you would not want the frame around the slide opening as rigid as possible. It seems like FR wants it that way based upon adding a gusset plate for the repair. Maybe some authorized (or maybe not) shortcuts were happening. I toured the factory and they told me the coaches are built piece rate so the faster the workers get done the sooner they can go home.
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Old 01-05-2014, 10:02 PM   #35
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I don't intend to get into an argument here, so this will be my last post on this thread. We have a 3170 with the crack. Mountainman45 said he was told that there was "a pretty good sized crack under the fiberglass". The picture does not show a crack. It shows two pieces of metal that do not appear to been previously connected. It may certainly be that they should have been connected but were not. It may also be that they were never intended to be connected. I'd want to know before I rigidly fastened parts of the frame of my motorhome that did not come that way. Forest River knows the answer and I'd be on them like a bird on a worm to find the answer. I'm way out of warranty and intend to dremel out a channel where the crack is, fill it with Marinetex, and see if it gets worse. If it gets worse, I'll go to Plan B, which I'll figure out if I need to.

By the way, we love our 3170

This is a wonderful forum and I value the opportunity to participate. I know other people have different opinions and I certainly respect them.
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Old 01-06-2014, 09:32 AM   #36
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[QUOTE=budblack;521281]I don't intend to get into an argument here, so this will be my last post on this thread.


Me 2. If you have a crack just patch it up per FR recommendations and move on. If FR has any issue with design or construction I'm confident they will take the appropriate action to remedy.
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Old 01-06-2014, 09:39 AM   #37
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Quote:
Originally Posted by MountainMan43 View Post
Im just a retired AF cop, but I trust this service center to do the right fix. They have been working with FR and I think (hope) that should result in the proper repair.
I'm sure you will be happy with the repair they decide to do. and all this will just become a bad memory.
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Old 01-08-2014, 10:50 AM   #38
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I'm sure the repair will be fine. As opposed to a crack, I'm guessing it was a missed weld, or they only got one side.
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Old 01-08-2014, 02:13 PM   #39
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I don't know about a missed weld, but there sure seem to be a lot of people out there with the same problem. As for the crack, the pictures were taken after they had done the prep work for the plate. My guess is that they cut out some of the cracked area. Getting the rig back tomorrow and will port some pictures. Thanks for the input everyone.
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