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Old 07-14-2014, 01:52 PM   #29
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Originally Posted by r carl View Post
If something isn't worn you will have to get the axle bent to correct the camber and toe-in.
Like this.
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Old 07-14-2014, 02:41 PM   #30
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The video illustrates the equipment and knowledge necessary to bend axles you should note that this video is for a spring axle and the only have to bend the tube. A torsion axle has a trailing arm between the axle tube and spindle. That makes the process quite a bit more complicated as they can not bend the spindle directly and the trailer frame has to bend also during alignment.
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Old 07-14-2014, 03:09 PM   #31
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sounds scary!
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Old 07-16-2014, 02:03 PM   #32
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Guess I am at square one.. so anyone know where I should go to find out what the problem is? Think we are heading towards Texas soon.

Might need new axle I guess.
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Old 07-16-2014, 04:23 PM   #33
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I have had my wheels aligned at JC - they adjusted the camber and toe-in. In my case, my axles are old (manufactured in 1986), so I am having new ones installed at JC next week.

The tires could also be a problem, particularly the ST tires. I have had weird wear and cupping caused by the tire belt shifting. I have also had the tread come loose at the edge, so that you could use the tip of your finger to stretch the tread away from the body of the tire and gaze down to see the row of steel belting. Those were Westlake tires (made in China).

For changing a flat tire, we use this: Trailer-Aid There are a number of similar "ramps". I can attest to the fact that they do work well - we had a blowout in May while on the 401 en route to Toronto (tire was a Goodyear Marathon). It took me a whole 15 minutes to do the wheel change.
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Old 07-16-2014, 05:10 PM   #34
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Check the Camber

Excessive Negative Camber will cause the inside edges to wear like that. Toe could maybe cause it, but my money would be on camber.

Camber is the in or out leaning of the tire in the vertical. As in, the tops of the tires leaning in toward the middle of the trailer is negative, leaning out is positive. Sports cars use a lot of negative camber so that the outside tire "plants" into the road rather than leaning outboard.

How could you get negative camber? Well, with one of these axles, if the axle were bent incorrectly, that could certainly cause it.

Toe is the horizontal relation ship of the tires. Toe in is when the fronts of the tires are pointing in toward the center of the trailer. Toe out is when the fronts are away from the center. Most cars use a little bit of toe-in because drag forces tend to toe them out a bit. So for steady state cruising, you'd like everything to be straight down the road. So maybe a wee bit of toe-in when it's parked will result in straight and true as you go down the road. But, I doubt it's toe.

It sounds to me like you really need to take it to a good shop and have them check things out.
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Old 07-17-2014, 05:19 PM   #35
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We do not know where a good shop is. Now have new tires on the rear axle but know that we have a problem. The shop we were going to in Colorado Springs does not do torsion axles...so headed back south and still doing research on how to fix our problem. Any shop suggestions would be great...help!
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Old 07-17-2014, 05:22 PM   #36
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Any alignment shop that does trailers should be able to check it and you could compare their numbers to specs. They may not be able to fix it but they should be able to measure it for you.
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Old 07-17-2014, 07:46 PM   #37
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Stop at a truck terminal and ask the service manage who alines tractor trailer axles.

You might try any truck garage with the same question.
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Old 07-17-2014, 09:34 PM   #38
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I was told years ago that Dura Torque axles beam can not be straightened due to the square tube design. If the axle beam is bent it needs to be replaced (new axle). I have also been told that the trailing arms can not be heated up and bent do to the fact they come in contact with the rubber rods.... This info came from a service tech I spoke to from Henschen
"CAN" any one confirm or dispute these two claims?

I know many of the problems Airstream had with Dexter axles was they were out of alinemnet (attachment arms welded on poorly) right from the dexter factory and there was no way to fix the problem except for replacing the axles and to resolve the issues Airstream gave owners new tires which did not fix the problem.

I have replace several axles due to shot rubber rods (axle sag) and never have seen a single dura-torque axle bent! I have on the other hand seen a hand full of axles bolted on from the factory off by as much as 3/4" from the ball to spindle measurement, which should be done on all axle replacement jobs. This means one side of the trailers attachment holes needs to be fill welded and new ones drilled. The first time I came across this I thought it was the holes on the axle were drilled wrong and a spare axle proved that it was in fact the holes on the trailer frame! This could be your problem but I would think only one side would show tire wear rather than both sides.

I would think if no axle damage is found it would be the weight distributed in trailer or maybe how your weight distribution system is set up?!
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Old 07-18-2014, 03:31 PM   #39
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It is getting difficult to go much further with this discussion because he has not yet check the axles to tell us if they are in fact out. It is simple enough to hold a string across the center line of the tires and let us know what we are dealing with.

As far as someone saying you can not bend square beams I can't imagine why anyone in the axle business would say that. My original Square axles were bend to aline them and my new Square axles were bent to aline them.

The video posted above dealt with leaf spring axles. Short of road damage there should be no reason to ever have them alined as they can be produced in alinement. However the video does illustrate what has to be done during alinement.

The torsion axle even if produced in alinement can be deflected out of alinement when bolted to the frame. Most people don't travel enough to even know if the axles are alined or not. Those of us that do have to have our axles alined or replace tire far more often than than acceptable.

My current tires are dated 4906 so have been on my trailer close to 8 years and may have well over 75,000 miles on them. One tire, the rear drivers side was showing some abnormal ware so it has been move the the center position. The others are not even down to the ware marks.
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Old 07-18-2014, 03:56 PM   #40
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FWIW,,, I had one tire wearing on the inside edge. This prompted me to change the axles that needed changing anyway.

If I read right and your axles are 1986 vintage, save yourself the trouble of trying to fix what probably needs replacing anyway.

The wear on my tires stopped with new axles.


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Old 07-18-2014, 08:17 PM   #41
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Ask Henschen where you can get the axles checked and possibly fixed or replaced. And use a tire tread gauge to keep checking them yourself until you get to the right shop for the job.

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Old 07-18-2014, 08:43 PM   #42
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Have someone demount the tire and turn them around so you can wear out the good edge of the tire. When you get home, order two new axles. The ones you have are worn out anyway. It will probably cost more to fix what you have than to just start over with new axles.

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