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Old 08-08-2016, 04:30 PM   #1
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Location: Brooklyn Park, MN, USA
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Sagging leaf springs

My tires on my 5th wheel are rubbing against the wheel well. I suspect spring sag . My rig is a 08 30 ft cougar. How do I approach getting this fixed. Obviously I can't continue using it this way. I don't think it has ever been overloaded and isn't that old. I am perplexed! Any help from you experienced folks out there would sure be appreciated.

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Old 08-08-2016, 07:16 PM   #2
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A RV dealer or a big rig trailer shop can r&r and fix you up.

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Old 08-08-2016, 07:43 PM   #3
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Weird, Is this a newly acquired trailer?
What size wheels a tires are on it?
Have you checked for a sheared dry bolt at the spring ends?

Best of luck.
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Old 08-08-2016, 10:24 PM   #4
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I have 2 thoughts.... 1 - find an industrial spring shop in your town and let them look at it and either re-arch the springs or replace them... 2 - crawl under the unit and look at the tag on the axle... which will supply the manufacturer and model (rating) of the axle... and go to one of their dealers and replace them...

I personally would first check the axle and rating... run the trailer by a scale at a truck stop and see where I stood with weight and the rating... and than make a decision.. if I was close to gross rating on the axle I'd see the industrial spring shop and tell them my plight... and if necessary add a leaf as well as re-arch to solve the problem...
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Old 08-09-2016, 12:32 AM   #5
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Leaf spring pack from mfg. barely meet load ratings and then add in some 'dynamic' load (bouncing up/down while traveling) and OEM springs can sag.

Mine did at 4 years (but that 4 years was Full Timing)'
7K axles with "3500" leaf springs.....but when I took it into a 'spring shop' they looked at spring pack and rated them at roughly 3000# based on number of leafs, width of leafs and eye to eye length.

Changed them out to 4000# rated leaf springs.
No issue since......no change in ride height. No harshness ---trailer rides/tows smoothly.

Get new springs and go up in load rating

Also check out the bushings/mounting holes.......wet bolt kit well worth it
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Old 08-09-2016, 04:07 AM   #6
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Rubbing the wheel well sounds more like a broken spring. Have it checked out ASAP for safety sake.
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Old 08-09-2016, 08:01 AM   #7
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As said before, an easy thing to check is over sized tires/wheels...
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Old 08-10-2016, 12:20 PM   #8
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Go to a spring shop and get the springs rearched or replaced. They know what they are doing probablu alot cheaper then the RV shop.
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Old 08-10-2016, 10:36 PM   #9
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Industrial shop is the way to go. If the springs have indeed sagged then they are shot. If you rearch an old spring it will fail. Let them suggest the best approach and you will be fine.
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Old 08-21-2016, 05:03 PM   #10
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Not to be contrary but I've changed out a few 5er springs and it's no big deal if you are handy with tools and have a place to work. You can find everything you need to know on line.( Google trailer springs) I agree with those above that if the wheel is rubbing you have something more than a "sagging" spring. Sagging is when the level is one bubble off to a side. But, it's far from brain surgery to replace one or more. A half inch drive socket set, a couple hydraulic jacks, some jack stands and a willingness to get your hands dirty will do the job. The real problem is Chinese springs which are notorious for failing. But if you just use the 5er lightly, replacing the bad ones with same rated chinese will probably last until the trailer wears out and be a good bit cheaper. If you tow long distances and/or are planning to have this trailer for many years, then you probably want to upgrade to US made springs and hardware. Hope this helps.

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