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Old 07-21-2016, 10:31 PM   #1
National RV Owners Club
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Cracked frame

Hi, just had my 2005 national 5355 checked out after I bought it and they found cracked frame where the tow hitch mounts. Anyone else experience this problem?

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Old 07-22-2016, 06:07 AM   #2
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My answer is not on mine. They must have been towing a heavy trailer.

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Old 07-22-2016, 09:31 AM   #3
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My 2004 35' Sea Breeze has a sticker on the rear saying 4000lbs max. I always thought that seemed a little low. Maybe not?. Anyone else out there had a cracked frame? Can you weld it?
2004 National RV Sea Breeze 8341 35'
GM 8.1 Vortec Allison 1000
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Old 07-22-2016, 09:38 AM   #4
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I am sure it could be welded and for safety I would weld a plate across the weld.
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Old 07-22-2016, 09:41 AM   #5
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Originally Posted by speed racer View Post
I am sure it could be welded and for safety I would weld a plate across the weld.

Agree. Take it to an experienced welding shop and they can readily advise how best to mitigate the issue. Is it the long rail that is cracked? If so, suggest to check the other rail as well. Maybe apply the fix there as well just to be sure.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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Old 07-22-2016, 03:45 PM   #6
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Do your homework on protecting your electronics and do not assume the shop understands everything on your coach and what precautions to take.

For example, I believe Allison says to be sure to disconnect the transmission before any welding on the vehicle. The manner of "disconnect" would be an example of something you will want to understand and supervise vs "close eyes and hope for the best"

I'm sure other precautions would be in order.

I know if it was me, prn't near everything with a ckt board would be getting unplugged and isolated.
GySgt USMC (Ret) '79~'99
2005 National RV Dolphin Limited 5342
Workhorse W-22
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Old 07-22-2016, 08:06 PM   #7
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Is it the frame extension that cracked? As mentioned probably from previous owner towing excessive weight. My 99 Dolphin hitch is rated at 5,000#
1999 35 ft. Dolphin 5350, F53, Banks System, 5 Stars Tune, Air Lift Air Bags, Koni Shocks, Blue OX TruCenter, TigerTrak track bars F&R, Roadmaster 1-3/4" rear auxiliary sway bar, 2004 F450 Lariat Pickup 6.0 Diesel Crew Cab DRW, 4X4, GVWR 15,000, Front GAWR 6,000, Rear GAWR 11,000, GCWR 26,000, 1994 36ft Avion 5er, GVWR 13,700, 2,740 Pin Weight.
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Old 07-23-2016, 08:59 AM   #8
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I've no idea about your RV but before I bought mine during the inspection I asked about having a motorcycle carry mount on the hitch in case DH every wanted to go. The inspector said "mine was not designed for downward weight on the hitch because of where the frame ends and it could break off or crack the frame. Maybe?

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2005 Dolphin 6355 LX WH24
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