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Old 04-07-2016, 07:26 PM   #1
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Ideas to strengthen rear bumper?

I want to attach a hitch receiver around the rear bumper so that I can install a bike rack. I have read a lot of threads about the 4" tube twisting away from the supports. I was thinking about welding a tab across the top and bottom of the tube and supports to beef it up. Thoughts? Pics would be helpful for any ideas that have worked for you.

Thanks.
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Old 04-07-2016, 07:37 PM   #2
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I put tabs something like what you are thinking on mine. I have my spare mounted on it and it started to break away like you have been hearing. If I were going to install a receiver I would think about getting a long enough tube and actually going right through the center of the bumper (welded both sides) and tie that into the frame.
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Old 04-08-2016, 07:54 AM   #3
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I think attaching the receiver to the frame is sturdy and important. I would put the receiver under the bumper with a saddle strap over the top of the 4" bumper and have the receiver extend to the frame. Thin wall 4" bumpers aren't very strong.

CLIFF
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Old 04-08-2016, 08:08 AM   #4
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I am on my 3rd fifth wheel and have built a receiver for all three, used to pull a boat, hang cargo carrier, bikes, etc. Like Clifford said, use a square tube(inside 2" x2") extend it forward from existing bumper to a tube running perpendicular to the frame and then attach it under bumper. I welded my hitches together, and bolted them to the camper with grade 8 1/2" bolts. never had any problem.
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Old 04-08-2016, 07:15 PM   #5
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Quote:
Originally Posted by Tightwadted View Post
I am on my 3rd fifth wheel and have built a receiver for all three, used to pull a boat, hang cargo carrier, bikes, etc. Like Clifford said, use a square tube(inside 2" x2") extend it forward from existing bumper to a tube running perpendicular to the frame and then attach it under bumper. I welded my hitches together, and bolted them to the camper with grade 8 1/2" bolts. never had any problem.
Hi Tightwadted. Any chance you have pictures. I have Cougar 29RLI and was told not to put a trailer hitch on the bumper. I am looking at attaching a tray of sometype so I can put a Transfer on it.
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Old 04-08-2016, 07:45 PM   #6
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When I did mine, I welded a 2" by 3" rectangular tube between the frame and then welded the receiver to that with it up against the bottom of the bumper and welding to it there also. Solid as a rock.
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Old 04-08-2016, 11:19 PM   #7
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Quote:
Originally Posted by Tightwadted View Post
I am on my 3rd fifth wheel and have built a receiver for all three, used to pull a boat, hang cargo carrier, bikes, etc. Like Clifford said, use a square tube(inside 2" x2") extend it forward from existing bumper to a tube running perpendicular to the frame and then attach it under bumper. I welded my hitches together, and bolted them to the camper with grade 8 1/2" bolts. never had any problem.
That is the best way to do it as it removes any twisting moments on the bumper and creates just straight down pull. Done that on all my units.
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Old 04-09-2016, 08:42 AM   #8
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I am going to try some angle iron in the corners. I dont have enough room in the top for a tab.Click image for larger version

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Old 04-09-2016, 10:56 AM   #9
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I made a bike rack that attaches with two receivers that I bolted and welded onto the bumper. I added the welds for security only. It's been on the back for 3+ seasons and over 10,000 miles. It's bike specific, but you get the idea. Nice thing is it's like a bike rack in that you can remove it.
The right side is clamped where the frame and bumper meet. My bumper is very solid and is not like that cheap Lippert stuff. It's an in house built frame from Northwood MFG.
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Old 04-13-2016, 09:12 AM   #10
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Hitch Pix

Hello NavyDiver: I've been away from computer for a few days, sorry it took so long to respond. Here are pix of my hitch.
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Old 04-13-2016, 11:38 AM   #11
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Hello NavyDiver: I've been away from computer for a few days, sorry it took so long to respond. Here are pix of my hitch.
Awesome, thanks very much. Now that all the snow is gone up here, maybe I can get a chance to look at the frame under mine.
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Old 04-13-2016, 11:00 PM   #12
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Just about all trailers are different. But good ideas here. The sheet metal bumpers are still pretty standard. If you intend to weld something to the frame 12"-18"-24" away from the sheet metal bumper but hang it off the bumper you may want to add a piece of flat iron to the bumper itself to keep it from cracking.
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Old 04-13-2016, 11:10 PM   #13
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Welded to all 4 corners today.
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Old 04-14-2016, 03:46 PM   #14
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What about removing the bumper and putting something a bit more substantial on it that whatever needed to be attached to it, could be?
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