Air suspension

Discussion in 'Fifth Wheelers' started by Jackomet, Feb 12, 2010.

  1. Jackomet

    Jackomet Read Only Funster

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    Peeps,
    I pull my KountryLite with a Nissan Navara which has had a air bag suspension upgrade to handle the extra pin weight. Thing is the air bag unit itself "leans" forward, see picture if it worked. Although the dealership assures me that this is OK does anyone who knows about ais sus agree with this. I would have thought it needs to be completely vertical to operate correctly.
    JK
     

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  2. GIBLA53

    GIBLA53 Read Only Funster

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    Will look at mine and post you back Al
     
  3. American Dream

    American Dream Read Only Funster

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    My Fitting instructions definitely show the unit vertical...but then again the axle is directly under the chassis cross-member.

    In the photo, your axle looks slightly rear of the cross member/fitting point.There seems to be no way of squaring it up.The bottom of the "bag" seems squarely over the axle which would make sense, whereas the top is wrapped around the chassis member.

    Both look like they cannot be moved.

    Does this have the effect of slightly "twisting" the air bag on compression...ie Will it compress squarely on itself?

    I'd ask a fitting company?
     
  4. GIBLA53

    GIBLA53 Read Only Funster

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    Just looked at mine and without taking off the wheels i cannot give definitive answer But one side vertical other side(drivers on rhd.) looks faintly off vertical not quite as much as yours as a guesstimate if yours was about 82 degs mine would be 85.Regards Al
     
  5. American Dream

    American Dream Read Only Funster

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    Is your axle mounted squarely on the leaf springs?

    I would have expected it to be the same both sides?Do you experience any unusual tyre wear?

    I assume it tows squarely?I have seen someone loosen the shackles on leaf sprung units before and adjust an axle when they replaced it for another but I would have thought it required expert alignment.

    Cannot see from the photo whether the lower mounts are fixed on the leaf spring?

    Cheers for the very interesting post as we were/are seriously looking at 5th wheel units.
     
  6. pappajohn

    pappajohn Funster Life Member

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    doesnt look right to me.....
    when the suspension compresses the leaf spring center and axle will move rearwards slightly due to the swinging spring hanger being at the back thus making the bag even more out of vetical.

    looks like its already putting an eneven load on the bag.

    as AD said it doesnt look like it can be moved though.
     
  7. robrobc

    robrobc Read Only Funster

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    I shall just pop out and checkmine..........................:BigGrin: :BigGrin::BigGrin::BigGrin:............................................................................................................................................................................................................................................................seems like I don't have any:Rofl1::Rofl1::Rofl1::Rofl1::Rofl1::Rofl1:
    :Rofl1::Rofl1:.............oh well my truck must be up to the job in the first place :BigGrin::BigGrin::BigGrin::BigGrin::BigGrin:

    Rob
     
  8. John The Foot

    John The Foot Read Only Funster

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    Looks slightly more pronounced than mine, is your's jacked up under the axle or body seeing as you have the wheel off, if you have the the body up then the axle will tend to hang on an arc from the front hanger more and look worse. So when the full weight is actually bearing on the air bag the whole set up should look more upright.
    By the way if any one out there is interested in an 06 Navara Aventura fully kitted out for towing a 5ver then please PM me as our experience of fifth wheelers was very short lived and disappointing, no names or slagging off, only a couple of members here know of our problems, but thats another story.
    Any one know of a large Hymer for sale,mid to late 90's money waiting.:Wink:
     
  9. American Dream

    American Dream Read Only Funster

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    Kountrylite eh?

    Now I'm intrigued....

    We are looking at 5ers and wonder whether the build quality really varies that much...

    From your post I guess the answer is.......YES.
     
  10. old-mo

    old-mo Funster Extra Special Life Member

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    If you are thinking of doing a lot of continental,, and like to get off site and visit quaint places and tow a toad or even a toad on a trailer.. :Cool:

    Stay with what you have.. :thumb:
     
  11. pudseykeith

    pudseykeith Read Only Funster

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    Hi J K.

    The Leafs on these type of road springs are centered by a center bolt that go's through each leaf and at the bottom where the spring sits on the axle ends with a , not a bolt head, but with a dowel that is located in the axle bed. What can happen if the spring is not tightly pulled down on the axle bed is the axle moves, slides, backward and shears of the dowel at the end of the center bolt. which appear to be the problem you have.
    To rectify you will need to jack up the chassis and support with axle stands, so that the axle hangs down, undo the U bolts, let the axle drop clear of the spring and check that the U bolt dowel has or has not sheered.
    If it has you will have to remove the spring from the vehicle and fit a new center bolt. the head of the center bolt will still be in the axle bed and need to be removed.

    If you do this your self the chassis ' MUST ' be supported by axle stands.

    Your van is running down the road slightly crab. This is a potencialy dangerous and could involve you in a very serious accident. CHECK IT OUT :shout:
    If you do the work yourself remember road springs are usually shorter at the front of the spring than at the back. don't fit it the wrong way round .

    Good look, Pudseykeith :thumb:
     
  12. robrobc

    robrobc Read Only Funster

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    Wise words as ever from Old Mo. I think it is "horses for courses", it all depends on how you use your holiday time I guess, one thing is for sure though the quality of the fifth wheels does very tremendously, as does the quality of the tow vehicles. The old adage "you pays your money and you takes your choice really does apply here"
     
  13. pappajohn

    pappajohn Funster Life Member

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    sorry john...got to disagree with you.....to an extent.

    in the pic the front is to the right and the spring is already at its lowest point.
    the bag is leaning to the front so when the spring is raised the 'arc' will cause the spring center to move towards the rear making the bottom of the bag even more rearwards.
     
  14. LesAshmore

    LesAshmore Read Only Funster

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    Just had mine done and yes it is slightly off vertical.
     
  15. American Dream

    American Dream Read Only Funster

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    Is that one or both sides Les?

    I think it's down to the original design/build.

    I cannot imagine it'll cause any problems as the Bag will compensate.

    By the way....Is there anything that is recommended to prolong the life ogf the rubber on these things or just leave well alone?

    It's not as if the sunlight can accelerate the aging of the rubber :RollEyes:
     
  16. zaskar

    zaskar Funster

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  17. Jackomet

    Jackomet Read Only Funster

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    Nav sus

    Pud,
    I have the Navara workshop manual, can't see pin you mentioned?
    JK
    Sorry about picture had to frig around with it to get the size down.
     

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