Ducato suspension.

Discussion in 'The Beginner' started by Vadre Smith, May 23, 2016.

  1. Vadre Smith

    Vadre Smith Funster

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    I have had 4 trips out in my 2011 Autotrail Excell 590 EK and am wondering if the harsh suspension is normal or do I have a problem.
    On smooth roads it is fine but any poor surfaces or potholes finds it really slamming in at the rear.
    I have fitted air suspension in place of the standard bump stops. This does feel a little better but its far from perfect.
    This is a sub 6 metre coach built so maybe the short wheelbase is a factor.
    Any thoughts?
    Thanks.
     
  2. StitchesnFluff

    StitchesnFluff Funster

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    Tyre pressures too hard
     
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  3. icantremember

    icantremember Funster

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    Or air bags over-inflated?
     
  4. Vadre Smith

    Vadre Smith Funster

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    Thanks for your replies.
    Tyres are 72 psi front and 80 psi rear.
    Air bags 2 bar (30 psi)
     
  5. Techno

    Techno Funster Life Member

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    Both
     
  6. Techno

    Techno Funster Life Member

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    Michelin always quote 80 psi rear regardless of weight and it is simply too much
     
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  7. pappajohn

    pappajohn Funster Life Member

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    My last motorhome tyre pressures were 80psi all round with rear airbags at 65psi
    It was 7500kg and 33ft long including a 10 ft rear overhang..
    My last european van was 24ft and 3850kg.
    Fronts 58psi
    Rears. 62psi

    Maybe says something about your tyre and airbag pressures.
     
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  8. Ed Excel

    Ed Excel Funster

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    The Excel has a very harsh ride. It has twin leaf springs on the back, so the suspension is quite stiff. One thing you should never get is a sagging back end. I replaced the bump stops on mine with softer rubber spring assistors; still didn't make much difference to the crashing over rough surfaces. I can't see how air bags would help, surely that's stiffening the suspension even more. If you have Motorhome type tyres fitted, changing them for standard tyres should help, by taking the stiffness out of the sidewalls. Finally, as suggested, match your tyre pressures to your axle weights. Hope that helps; I'm on a second set of dentures lol.
     
  9. WillH

    WillH Funster

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    Lower your tyre pressures a bit at a time until you get a balance between comfort and handling, then check that they are not wearing unevenly. Took me about three months to get mine sorted.
     
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  10. mikebeaches

    mikebeaches Funster

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    I've always thought the Ducato rear suspension is a bit agricultural, to say the least. But your tyre pressures are way too high, which will make it much worse.

    No knowledge of the air suspension, so can't comment on that.
     
  11. Hymie

    Hymie Funster

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    Mine's an older Hymer, TP is marked on wheel arches at 62psi front & 64psi rear, air suspension is set at 2 bar, still feels like someone hit it with a sledge hammer on any potholes.
     
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  12. Vadre Smith

    Vadre Smith Funster

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    Ok so I am not expecting it to ride like a Lexus but it seems I need to experiment/research tyre pressures to see if this softens it a bit.
    Thanks to all so far.
     
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  13. Gorse Hill

    Gorse Hill Funster

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    I have AS and always thought 3 or 4 bar standard as indicated by manufacture TP 65psi
    Van 3500 and 7 meters
     
  14. Ranger

    Ranger Funster

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    When you stop for a break after a run immediately place your hand on the tread of each tyre. If it is hot its underinflated or overloaded, if cold its over inflated and if just warm it will be about right and not stressed. Do also remember that it is a legal requirement in the UK to have the correct tyre pressures but what is the correct pressure?
     
  15. Techno

    Techno Funster Life Member

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    Best thing is weigh both axles and then email Michelin for pressures BUT instead of asking for front and rear ask for front at pressure A
    And FRONT at pressure B (rear)
    They will say 80 psi for rear regardless
     
  16. Figaro

    Figaro Funster

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    I think Michelin have a standard reply to all motorhome tyre pressure enquiries whatever weights you give them.
    I've seen replies posted on here identical to the reply I received and 80 psi does seem to give a harsh ride so I think I'll drop mine to 70 and see what that's like
     
  17. Speve

    Speve Funster

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    I have Michelin Agilis campers on our Hymer run at 5 bar rear and 4.5 bar front when loaded seems to do the trick
     
  18. denisejoe

    denisejoe Funster

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    What is the max pressure on your tyres mine are only 70psi

    Joe
     
  19. Lenny HB

    Lenny HB Funster

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    If you are referring to the markings on the tyres that is only for the USA.
     
  20. denisejoe

    denisejoe Funster

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    What's the max pressure for toyo ho9 then never felt the need to go that high anyway

    Joe
     
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