Problem with Springs - Page 2 - Fiberglass RV

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Old 11-13-2007, 08:20 AM   #15
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Joe Z's Avatar
Trailer: Casita
New River AZ
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All of the above recommendations may work but just for the heck of it look under the trailer dead center at the axle where the spring meets and look to see if there is a crack in the main leaf spring (the one that's hooked to the shackle in your picture)it may have cracked and moved out some to let that shackle come back like that. ( I replaced many springs in Semi's and this sometimes happens) check that main spring (top leaf) from front to rear as the wear on the side of that shackle just doesn't look right
If it has cracked and you need to replace springs do both sides or one side could sag more than the other and create a big problem when going around a bend in the road.......
Sure hope the wd 40 thing helps

Joe and Linda
2013 Casita SD
Dodge Ram 4x4
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Old 11-13-2007, 08:21 AM   #16
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Name: Donna D
Trailer: Escape 5.0 TA, 2014
Posts: 23,916
You might get the shackles to free up with some sort of penetrating oil, but dollars to donuts the bushings are long gone.

Here's a quote from an automotive spring company:
In leaf spring type suspensions, there are significant forces focused on the pivot points and shackles. For this reason, it is imperative to replace the soft, blown-out OEM rubber bushings. Why not replace them with a set of these Prothane leaf spring and shackle bushings? They're made of premium grade polyurethane and precision fabricated for a perfect fit. Plus, they won't wear out or deteriorate like the stock set. Who could ask for more?

Donna D.
Ten Forward - 2014 Escape 5.0 TA
Double Yolk - 1988 16' Scamp Deluxe
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Old 11-13-2007, 06:50 PM   #17
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Donna's correct -- Likely the original bushings were relatively thin nylon sleeves and have worn away to nothing. Where the metal is touching other metal, you now have grinding. All this is making slop in the motion and that slop is potentially getting to the tires and affecting their contact angles with the road.

Were it my trailer, I would renew the shackles, bushings and bolts, plus take a careful look at the springs leaves themselves (many are built with nylon rubbing shims between them), and I would likely use the bushings Donna mentioned. However, unless there is distinct wear on the tires, you could oil them occasionally and go a long time. BTW, WD-40 is a water-displacing penetrating oil, but not really much of a lubricant, so after using it to loosen stuf, it should be followed up with some grease or lube oil.

Most leaf-spring nuts/bolts that I have seen have special locking threads on them that are essentially destroyed when disassembled, so bear that in mind. Also inspect the hardware holding the axle beam to the springs in the center of them.

Note that Dexter warrants new torsion axles for five years but only warrants new leaf spring axles for one year.

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