edmck

Using Front Jacks To Reduce Body Flex - True Or False

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edmck   

Is it true that lowering the front jacks to the point where the weight is off the front wheels you will reduce body flex/torque when the rear jacks are deployed to level the coach? Just had some guy in our park tell me that as he watched me recaulking the top of the front cap on my coach because of body flexing.

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Ed,

In my opinion if you have an issue with your chassis flexing because you have leveled the coach, then you have raised the coach to a very unsafe level. Leveling jack are to level the coach and to keep you from getting sea sick from the swaying.:P

Herman 

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wolfe10   

edmck,

That is a riddle with no repeatable answer.

If the rear is enough higher that you need to raise the front until weight is off the suspension, YOU ARE LEVEL.

If the rear is not enough higher that you need to raise the front until weight is off the suspension, YOU ARE LEVEL.

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Don't try to level the coach side to side if the air has been dumped.  If the ground is slanted and the coach is on the bump stops and you lift one side you will twist the body. The front jacks need to be down so that the body can tilt as needed.  The front jacks are plumbed together so even if they are down the front can tip.

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I do know on my coach I  have to use the front jacks enough to allow the body to move. The rear jacks can be lowered individually but the front jacks are on one button. So you move the front up off the stops and use the rear jacks to level side to side. I have read some where in my documentation that not doing it this way can cause body twisting. :o

Bill

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TBUTLER   

So many different systems, we need to know what year and model coach and what leveling system you have. 

Our first coach had a tripod system, one jack in the center front, two in the rear.  The front was a pivot point for side to side leveling, thus no twisting of the frame. 

Our present coach has air leveling only, HWH system.  So we don't have this problem.  But it is a totally different animal from the OP. 

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FIVE   
23 hours ago, manholt said:

edmck,

In the interest of Science...what year, make and model coach do you have?

Got your slide rule out, Carl?:lol:

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RAYIN   

Wasn't preventing frame flex the very reason for the 3-jack system? HWH jacks work in pairs to prevent excessive frame flex, however when air bags are dumped this can allow the frame to flex on extremely unlevel ground; which is probably why Winnebago says to level the coach first then extend slides.

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