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Old 12-30-2012, 07:55 AM   #11
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DON'T place any jack under your axle ! (I carry a bottle jack & a small scissors jack).....Bill
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Old 12-30-2012, 08:19 AM   #12
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I carry a 20 ton bottle jack (yes it is overkill but they have other uses when you live on an acerage) and put a piece of 2x2 on the frame rail between the tires then put the jack up against that.
That is what we do as well, although I use a 2x2 inch steel tube to distribute the weight along the frame.
Our fifth has a subframe that the axles are mounted to, then that assembly is welded under the camper frame. I am not sure if all campers with torsion axles have a subframe, but jacking on that subframe distributes the jacking force nicely along the main frame.
As our camper has a very light main frame, I would never jack directly on that, especially not without some kind of heavy bar to distribute the force. It would be very easy to bend the frame trying to lift the whole side of the camper on the head of a hydraulic jack. That would be a very undesirable result.
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Old 12-30-2012, 06:11 PM   #13
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Axle tubes are hollow and very thin. Jacking under axle will bend an axle
I recently contacted Dexter Axle manufacturers to clarify the whole issue on whether or not it is okay to jack on the "torsion axle". They advised it was okay as long as jack is place under axle where it meets the frame of the travel trailer. I can dig up the email correspondence I had with their technical department.
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Old 12-30-2012, 06:36 PM   #14
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why take a chance ? - jack the frame.....Bill
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Old 12-30-2012, 06:55 PM   #15
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why take a chance ? - jack the frame.....Bill
If I had the option, I would probably jack the frame as well. It was easier for me to jack by the axle on my unit. However I was always scepticle that there should be an issue if the axle is in fact jacked where it meets the frame. That is why I contacted Dexter direct and they assured me that it would be okay as long as I was aligned with the frame above the axle. I would agree with you that in the case where it is more practicle, one should jack by the frame. Just wanted to clarify that jacking by the axle is not necessarily a "complete NO. NO"
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Old 12-30-2012, 07:13 PM   #16
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What frame! all thats there are three pieces of thin steel creating a lamination that is lite but not particularly strong, there is also the fact that it will twist if you lift it with a jack, the way pdchristensen describes how to use a jack makes sense as that is where the weight is set.
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Old 12-30-2012, 10:40 PM   #17
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What frame! all thats there are three pieces of thin steel creating a lamination that is lite but not particularly strong, there is also the fact that it will twist if you lift it with a jack, the way pdchristensen describes how to use a jack makes sense as that is where the weight is set.
The trouble with the torsion axles is that even if you jack on the axle flange, where it mounts to the camper frame, you still have to lift all of the weight on that side of the camper. Unlike leaf spring suspension, as you jack up the camper, the tire stays on the ground until all of the load on the rubber "spring" is released.
Does your Surveyor have torsion axles?
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