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 > Jacking to change a tire or service brakes or bearings?

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jkwilson

Indiana

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Posted: 03/11/18 04:42pm Link  |  Quote  |  Print  |  Notify Moderator

I know this has been beaten to death, but my situation is a little different than most of the threads I see here. I have towed a lot of different trailers a lot of miles, and have changed tires in gas station parking lots, on lonely gravel roads, in muddy fields and a bunch of other inconvenient and dirty places.

Every single time I’ve jacked up a trailer, I’ve put the jack under the plate on the end of the axle where it mounts to the spring or to the frame of the trailer. As an engineer I can tell you, in spite of what manufacturers may tell you, this is the best place to lift one for a tire change. I carry a hydraulic jack in my truck with plywood pads and never have a problem.

But my 5th wheel is different. I thought I had a workable method, but I’m glad I learned it wasn’t practical at home. The biggest difficulty is the fact that there is no plate under the axle, just the U-bolt.

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If I try to lift by the frame, besides the fundamentally bad idea of applying a load at an unstabilized point on an I-beam with a very narrow flange, I have to lift the trailer forever to get the tire off the ground. The jack will need a lot of blocking just to reach the frame, and I’ll end up with a jack sticking way up and the trailer leaning over to compensate for spring movement. Not ideal for frame integrity or stable jacking.

I’ve tried driving it onto a block, but the distance between the axles makes this impractical. I’d need to carry half a lumber yard to get high enough to lift the other wheel.

There has to be a better way.


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MFL

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Posted: 03/11/18 05:00pm Link  |  Quote  |  Print  |  Notify Moderator

I use a hard piece of 2x4, I think it's oak, under the u-bolt. I cut out a groove, that just fits the u-bolt, making a flat surface on the axle. Then I put a short bottle jack under, to just raise the tire.

Jerry





MarkTwain

Northern, Ca. , USA

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Posted: 03/11/18 05:09pm Link  |  Quote  |  Print  |  Notify Moderator

Camping World sells a device called "Trailer Aide". No jacks are needed[emoticon] Just drive your RV tire up the tire and the other tire will be lifted off the ground. The just move the trailer aide to the other tire. I carry 2 at all times in my trailer.

rhagfo

Portland, OR

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Posted: 03/11/18 05:13pm Link  |  Quote  |  Print  |  Notify Moderator

Sorry but I place the jack directly I n the axle and lift! While many would like you to think these axles are made of tin foil, they are strong enough to support the load the tire is carrying. If they were so thin jacking would dent it, then the first small pothole you hit the tire would be leaning out at 10 degrees!


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F-TROUP

VISALIA, CALIF

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Posted: 03/11/18 05:43pm Link  |  Quote  |  Print  |  Notify Moderator

With independently sprung axles the Trailer Aid won't get the flat off the ground. I use a bottle jack and jack stand.

Old-Biscuit

Verde Valley

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Posted: 03/11/18 05:46pm Link  |  Quote  |  Print  |  Notify Moderator

Axle Saddle for bottle jacks......LINK


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agesilaus

North Florida

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Posted: 03/11/18 05:47pm Link  |  Quote  |  Print  |  Notify Moderator

F-TROUP wrote:

With independently sprung axles the Trailer Aid won't get the flat off the ground. I use a bottle jack and jack stand.

Yeah that's the case with my fiver, however the traileraid is still handy since it will reduce the amount of jacking that you have to do. But a stack of 2X8's will do the same.


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Lwiddis

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Posted: 03/11/18 06:01pm Link  |  Quote  |  Print  |  Notify Moderator

“There has to be a better way.“

Build a sufficient wooden ramp. No jacking necessary. Sorry you are tired.


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Dave H M

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Posted: 03/11/18 06:04pm Link  |  Quote  |  Print  |  Notify Moderator

I do exactly like MFL describes.

What is that old saying about great minds. [emoticon]

Puddles

Lafayette, Indiana

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Posted: 03/11/18 06:18pm Link  |  Quote  |  Print  |  Notify Moderator

Old-Biscuit wrote:

Axle Saddle for bottle jacks......LINK


Have a home made version of this... 4" metal coupler cut in half, weld 1.5" pc of pipe on the underneath side to fit over top of bottle jack. Coupler is sized to fit btw U bolts. used many times over last 10 yrs.


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