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CentralCoastCampers

Central Coast, CA

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Posted: 08/29/10 02:29pm Link  |  Print  |  Notify Moderator

Pulled into a campground for an overnight and smelled tire smoke when we stopped. Discovered the wheels on the right side of the trailer were touching. Further inspection revealed that the front shackle on the rear axle had failed. The bolt on the leaf spring had ripped out of the shackle, and the leaf spring was now sitting against the frame, shifting the axle forward. Luckily, the axle manufacturer listed their parts suppliers in their manual, and there was one within an hours drive. Took the damage shackle off, and spent a whopping $7.27 in replacement parts. Had the new parts on in less than an hour. The guy at the parts place said he had never seen shackle brackets fail like that, and say they didn't look like they had cracked or had a defect. It looked like the bolt might have gotten a little loose, it wore a bit, and then ripped through.

Here area couple of pics of the shackle and leaf spring before replacement. This isn't a part I inspected on a regular basis, but it is now. Just wanted to share so others might be able to prevent this from happening to them.
Pictures

* This post was edited 08/29/10 03:05pm by CentralCoastCampers *


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BobsYourUncle

Surrey, BC Canada

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Posted: 08/29/10 02:48pm Link  |  Print  |  Notify Moderator

I don't see any pics . . .


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SWD

Land of Living Skies

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Posted: 08/29/10 02:55pm Link  |  Print  |  Notify Moderator

Ditto BYU

CentralCoastCampers

Central Coast, CA

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Posted: 08/29/10 03:06pm Link  |  Print  |  Notify Moderator

Had a problem getting the pics to work, so did a link. It should work now.

BobsYourUncle

Surrey, BC Canada

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Posted: 08/29/10 03:16pm Link  |  Print  |  Notify Moderator

Wow!
I have never seen a shackle fail like that before. It's like the bolt was yanked right out the end of the steel.

Gadget Guy

Calgary

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Posted: 08/29/10 03:20pm Link  |  Print  |  Notify Moderator

Wear on the shackles is a common problem and not caused by loose bolts. The type of shackles that are used are not meant to be used on an RV unit that sees a lot of miles. They should be inspected regularly and changed every 6000 miles. A good upgrade is to change them over to a greaseable unit. They come with brass bushings and the side plates are made from at least 3/8" material. It is really to bad that RV manufactures use these light duty shackles to save a few dollars.

richfaa

Ohio

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Posted: 08/29/10 03:33pm Link  |  Print  |  Notify Moderator

Same thing happened to us on our 06 Montana 3400. We never checked the shackle bolts for proper torque as required in the instruction manual and paid the price.


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Rvpapa

Alberta , Can.

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Posted: 08/29/10 04:17pm Link  |  Print  |  Notify Moderator

That is normal for plastic bushings. The bolt seizes up in the spring eye and then reams out the shackle plate until it fails.
Art.

bstark

Ontario, Canada

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Posted: 08/29/10 04:50pm Link  |  Print  |  Notify Moderator

Rvpapa nailed it! As the spring performs it's function with a seized bolt in one eye it causes the bolt to rotate slightly in the shackle plates thereby wearing it's way slowly through with every up and down cycle of the axle.

The other parts to inspect while you're under there is those center bolts of the 'dog-bone' equalizer beams. It's a little harder to do because you have to support the rig while your remove the beam from within the hanger but when you do you'll see those beams are developing vertically 'oval' holes.

A quality wet-kit with zerked bolts and bronze bushes is the answer for these ills.


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C Schomer

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Posted: 08/29/10 05:23pm Link  |  Print  |  Notify Moderator

You sure got lucky, having parts that close - that would have been hard to fix with baling wire or duct tape! Craig

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