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#4631359 - 01/11/18 11:31 AM don't jack up trailer by suspension?
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4848
Loc: Houston, Texas
Why do trailer manufacturers say this? I like to put the jack right under the equalizer. Works great assuming the trailer is chocked and you put it in the middle so it doesn't slide off. This method allows me to raise both tires at the same time.
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#4631369 - 01/11/18 11:36 AM Re: don't jack up trailer by suspension? [Re: motor_oil_madman]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
I always just jack under the axle itself on the one tire I want to remove & replace.
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#4631411 - 01/11/18 12:05 PM Re: don't jack up trailer by suspension? [Re: Linctex]
ls1mike Offline


Registered: 06/14/08
Posts: 5116
Loc: In the Garage...
Originally Posted By: Linctex
I always just jack under the axle itself on the one tire I want to remove & replace.


I do too. I am not sure of the reasoning as the axle sees similar stresses going down the road.
Perhaps they are afraid it will slip off and someone will get hurt?
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#4631471 - 01/11/18 01:01 PM Re: don't jack up trailer by suspension? [Re: motor_oil_madman]
Nick1994 Offline


Registered: 02/19/13
Posts: 10097
Loc: Phoenix, AZ
As long as you don't have 5,000+ pounds on the trailer it's probably fine.
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#4631491 - 01/11/18 01:22 PM Re: don't jack up trailer by suspension? [Re: motor_oil_madman]
motor_oil_madman Offline


Registered: 11/29/09
Posts: 4848
Loc: Houston, Texas
I don't see putting it on the frame either. Most are just cheap angle iron.
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#4631622 - 01/11/18 03:56 PM Re: don't jack up trailer by suspension? [Re: motor_oil_madman]
64bawagon Offline


Registered: 01/10/17
Posts: 167
Loc: Michigan
Everything under an RV is the lightest and cheapest they can legally get away with.
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#4631654 - 01/11/18 04:41 PM Re: don't jack up trailer by suspension? [Re: motor_oil_madman]
CKN Offline


Registered: 10/14/14
Posts: 3689
Loc: Utah
If you put it under the frame and it slips off you will have a hole in your floor. The SOP is to put it under the axle near the clamps for the springs.

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#4631740 - 01/11/18 06:22 PM Re: don't jack up trailer by suspension? [Re: motor_oil_madman]
Rand Offline


Registered: 08/20/03
Posts: 12638
Loc: NE,Ohio
probably also depends on if its got a full load or empty.

just doing maintenance its not super important as long as its in a sturdy location.

Doing a tire replacement with a max load... a little different dont want to bend anything.
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#4631807 - 01/11/18 07:31 PM Re: don't jack up trailer by suspension? [Re: Rand]
CKN Offline


Registered: 10/14/14
Posts: 3689
Loc: Utah
Originally Posted By: Rand
probably also depends on if its got a full load or empty.

just doing maintenance its not super important as long as its in a sturdy location.

Doing a tire replacement with a max load... a little different dont want to bend anything.



By your comment I can tell you don't own a recreational travel trailer. It needs to get jacked up by the axle regardless.


Edited by CKN (01/11/18 07:31 PM)

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#4631817 - 01/11/18 07:39 PM Re: don't jack up trailer by suspension? [Re: motor_oil_madman]
Alex_V Offline


Registered: 04/10/16
Posts: 1155
Loc: Campbellsville, KY
Under the shackle plate is my choice if I can get to it. If an unloaded, light trailer the cast link between the two springs is more than adequate.
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#4632154 - 01/12/18 06:52 AM Re: don't jack up trailer by suspension? [Re: motor_oil_madman]
Donald Offline


Registered: 03/21/04
Posts: 20450
Loc: Upstate NY
Well the easiest if you have dual wheels is to run one tire up onto a 2x4 and the other wheel will be off the ground.

If you try and jack up the frame you will lift the frame a lot taking weight off springs but may not get wheel off the ground before max lift for jack.

I jack under axle or leaf spring next to it.
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#4632188 - 01/12/18 08:01 AM Re: don't jack up trailer by suspension? [Re: motor_oil_madman]
meep Offline


Registered: 02/20/07
Posts: 3551
Loc: Southeast
I've always jacked at the axle as close to the spring as I can get.

BUT- I've also read NOT to lift by the axle because it is in itself a spring, designed to flex for camber - and therefore not the strongest of places to support a point load such as a jack. So I certainly don't put the jack anywhere inboard.

-Meep
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