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Subject Topic: Towball Height Post Reply Post New Topic
11/1/2015 at 8:19pm
 Location: None Entered
 Outfit: Kia Sportage & Sterling Eccles 584
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Whats the ideal height to the centre of the towball, just had a detachable witter fitted to our new type Vauxhall Astra, seems abit high to me at 435mm, cheers.


11/1/2015 at 8:26pm
 Location: Midlands
 Outfit: Mondeo Avondale Gram
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350mm - 420mm with a loaded vehicle so 435 sounds about right when its loaded it will drop 15mm quite easily.



11/1/2015 at 8:35pm
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Thanks for the quick reply mate, sounds like it,ll be fine then.


12/1/2015 at 1:22pm
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 Outfit: Swift Challenger Sport 524 VW Carave
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When car and van are loaded and hitched up, the van should be either level or slightly 'nose down'. Under no circumstances should the van hitch be pointing upwards.
Bertie.

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The 2 Tops


12/1/2015 at 3:52pm
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Cheers Bertie.


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12/1/2015 at 5:37pm
 Location: Lichfield
 Outfit: Coachman Amara 450
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I would agree with the previous answers but the only true way to find out is to set the correct noseweight on the caravan first, hitch up then and have a visual look yourself as more than likely the caravan will look level.


13/1/2015 at 1:16pm
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 Outfit: Swift Challenger Sport 524 VW Carave
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Quote: Originally posted by tango55 on 12/1/2015
I would agree with the previous answers but the only true way to find out is to set the correct noseweight on the caravan first, hitch up then and have a visual look yourself as more than likely the caravan will look level.


With the van hooked up in travelling trim, drop a spirit level just inside the doorway - this will ensure whether the van is tilting upwards at the towball. If not, and visually not excessively tilted forwards, then everything should be OK.
If there is too much sagging of car/caravan at the hitch, the jockeywheel, even in its raised position, could hit things like speed humps.
Bertie.


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The 2 Tops


13/1/2015 at 3:44pm
 Location: Midlands
 Outfit: Mondeo Avondale Gram
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If its sitting slightly nose high it maybe that the suspension rubbers have gone soft and the caravan maybe lower than it was when new.

I think mine its 1/2" lower than it was when we bought it. But that was almost 15 years ago.

Time flies, We have owned this van for 15 years..



14/1/2015 at 10:23am
 Location: None Entered
 Outfit: Swift Challenger Sport 524 VW Carave
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Grampian91, if you've had the van for 15 years you are obviously very satisfied with it. So, if changing it is out of the question, renewal of the suspension rubbers would be an economical option if the "lean" went in the wrong direction. Do you already have/or can you fit shock absorbers, which would help to delay any repeat of 'sinking'.
Bertie.

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The 2 Tops


14/1/2015 at 10:52am
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Its not a diy job to change suspension rubbers on Al-ko axle, you have to remove axle & get it reconditioned. They normally last life of caravan. Mines still ok & its 1985. Fashionable to fit shock absorbers nowadays but we seemed to manage ok without them before. Australian off road caravans use Alko axles without shock absorbers which should tell you something.


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14/1/2015 at 12:09pm
 Location: None Entered
 Outfit: Swift Challenger Sport 524 VW Carave
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Our 2012 Swift does have shock absorbers, whereas our 2006 Coachman did not (similar size and weight vans). I have to say that the Swift recovers more quickly after passing over a wavy piece of road - where M-way lanes change and use the hard shoulder for temporary road works is one good example.

Concerning renewal of suspension rubbers, I wasn't suggesting this should be a DIY procedure.
Bertie.


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14/1/2015 at 4:11pm
 Location: Midlands
 Outfit: Mondeo Avondale Gram
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Quote: Originally posted by The 2 Tops on 14/1/2015
Grampian91, if you've had the van for 15 years you are obviously very satisfied with it. So, if changing it is out of the question, renewal of the suspension rubbers would be an economical option if the "lean" went in the wrong direction. Do you already have/or can you fit shock absorbers, which would help to delay any repeat of 'sinking'.
Bertie.



Yep its suited out needs, WWe almost changed it once, Bout the thought of spending £4000 + ours as P/Ex made us think WHY?
The newer van offered very little extra for all that money.

1/2" drop is nothing. But i will keep an eye on the rubber to make sure its not going to fail.

Its obviously worth very little now so. Maybe time to start looking for a newer one?



14/1/2015 at 5:00pm
 Location: Teesside
 Outfit:  Mitsubishi ASX4
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Quote: Originally posted by The 2 Tops on 14/1/2015
Do you already have/or can you fit shock absorbers, which would help to delay any repeat of 'sinking'.
Bertie.



No. Shock absorbers won't make the slightest difference here. They are shock absorbers, nothing more.



15/1/2015 at 12:44pm
 Location: None Entered
 Outfit: Swift Challenger Sport 524 VW Carave
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Quote: Originally posted by freeatlast on 14/1/2015
Quote: Originally posted by The 2 Tops on 14/1/2015 Do you already have/or can you fit shock absorbers, which would help to delay any repeat of 'sinking'.
Bertie.



No. Shock absorbers won't make the slightest difference here. They are shock absorbers, nothing more.




But they do reduce the amount of shock loads the suspension units otherwise have to absorb without secondary assistance, which comes back to reduced wear and a longer life. The rubber suspension units were designed with the intention of also providing shock absorbing characteristics, so why else would they have been later added to the spec of many van chassis assemblies?
Bertie.


-------------
The 2 Tops


15/1/2015 at 4:16pm
 Location: Midlands
 Outfit: Mondeo Avondale Gram
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I think mines just before they had the shock fitments.

So not a simplae task to add them, I also have the mover so maybe another issue.

I will just have to keep an eye on it. I dont think its worth spending the cost of a new axle whether a genuine Alko one or a cheaper replacement.



15/1/2015 at 6:41pm
 Location: Teesside
 Outfit:  Mitsubishi ASX4
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Quote: Originally posted by The 2 Tops on 15/1/2015
Quote: Originally posted by freeatlast on 14/1/2015
Quote: Originally posted by The 2 Tops on 14/1/2015 Do you already have/or can you fit shock absorbers, which would help to delay any repeat of 'sinking'.Bertie.



No. Shock absorbers won't make the slightest difference here. They are shock absorbers, nothing more.




But they do reduce the amount of shock loads the suspension units otherwise have to absorb without secondary assistance, which comes back to reduced wear and a longer life. The rubber suspension units were designed with the intention of also providing shock absorbing characteristics, so why else would they have been later added to the spec of many van chassis assemblies?
Bertie.



Rubber suspension units do provide some shock absorbing characteristics just as the springs on a car do, but separate shock absorbers provide a measured dampening effect.

I doubt, in actual use, the shock absorbers would have even the slightest effect on the long term compression of the rubber in the suspension system unless the van is used for huge mileages year in year out.

If you want to reduce the compression effect, during winter support the axle on axle stands so that the wheels are supported off the ground.



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