#1

Inexperience !

in Anything Eriba-related Sat Sep 10, 2016 7:16 pm
by Lily (deleted)
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I suppose I can consider myself very lucky..... We bought our Troll 552 last May in Normandy, on the 1st of May to be precise, which is when the French give each other Lily of the valley ( Muget in France) as a good luck token. ( which is why we named her Lily, and possibly the reason for my good luck)?
We are new to caravanning but used to towing a large trailer and set of to the Dordogne where she now lives....without incident. This only helped to reinforce what I had read, namely that Eriba's being rated at 100kph tow like a dream. !
Come August and we set off for our holiday on the 'cote sauvage', having taken care to even out the load in Lily, check tyre pressures with the manual and even put some heavy items in the car to ensure stability......Travelling south on the Motorway from Bordeaux, flushed with all this confidence, I overtook a large artic at about 100kph and nearly came to grief....it all started to snake, to the point where I could hear tyres screaming ( not sure if they were car or caravanne) I am now convinced that we had lost it as it was steadily getting worse so I hit the accelerator and pulled it out of the sway, but then, of course I'm going even faster, so ever so gently I slowed down and made my way onto the hard shoulder. I got off at the next exit, pulled over and tried to stop myself shaking....I'm not afraid to admit it scared the life out of me.....and my wife.!
During our stay at a campsite I took the Alko tow hitch off and headed for a caravanne dealers where I had new friction pads fitted ( even though they looked OK.) The other thing that was bothering me was the tyre pressures, they did look a bit soft, so when we headed home the first stop was a service station where I put in more air ( from 35 psi to. 45 psi) and immediately it felt better.
My question (eventually) is, what pressure should I have in the caravanne tyres, and how do I know if the weight distribution is correct. ? I don't want a repeat performance.


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#2

RE: Inexperience !

in Anything Eriba-related Sat Sep 10, 2016 7:37 pm
by eribaMotters | 5.601 Posts

The only time I have ever experienced a wiggle as you had was with my 552Gt. I had set the tyres at book pressure and suspected they were wrong. Upon my return to the UK I contacted Hymer who admitted the tyre pressures advised in the handbook were wrong.
The problem is eriba can and have been fitted with car, commercial and reinforced tyres. All require different pressures.
Since then I have used the attached document to determine caravan my tyre pressures. I have a copy printed off and kept in the van.

Colin


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caravan tyres document_tyresafe.pdf caravan tyres document_tyresafe.pdf

eribaless at present, 4th eriba, a 2017 430 on order.
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#3

RE: Inexperience !

in Anything Eriba-related Sat Sep 10, 2016 7:53 pm
by hob (deleted)
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It will depend on what type of tyres the last owner fitted, I have fitted light commercial tyres to mine as the normal ones in the manual are too close to the weight limit, another thing to consider is the weight limit of the van a normal troll will have an axle limit of 1000Kg an uprated one will have a 1200Kg axle.

Forget the manual and check the vin plate for weight to determine if standard or uprated and check the tyres to see what is fitted (probably not those listed in the manual) also look for a max load rating and max pressure limit

then this calculator will give a better idea of the required pressure

http://www.tyresafe.org/check-your-pressures/caravan-pressure-calculator/

With the tyres I have my Triton should run at 52psi on the tyres that I fitted (1000Kg axle)


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#4

RE: Inexperience !

in Anything Eriba-related Sat Sep 10, 2016 8:22 pm
by hob (deleted)
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Zitat
Since then I have used the attached document to determine caravan my tyre pressures. I have a copy printed off and kept in the van.

Colin



The chart in your PDF does not cover light commercial tyres when used in conjunction with a 1000Kg axle (unless I missed it but I don't think so)


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Last edited Sat Sep 10, 2016 8:37 pm | Scroll up

#5

RE: Inexperience !

in Anything Eriba-related Sat Sep 10, 2016 8:31 pm
by Randa france | 13.283 Posts

Hi Lily.

Is this the Hymer chart you've been using? It's the most recent one we've seen. Tyre Pressure Chart

Randa


1999 Eriba Troll 530 pushing a VW Touran 2L TDi Match


Last edited Sat Aug 05, 2017 10:25 pm | Scroll up

#6

RE: Inexperience !

in Anything Eriba-related Sat Sep 10, 2016 8:59 pm
by eribaMotters | 5.601 Posts

That is the data Hymer sent me in 2008.
The pressures in the pdf attachment I posted above are more comprehensive and those that I use.

Colin


eribaless at present, 4th eriba, a 2017 430 on order.
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#7

RE: Inexperience !

in Anything Eriba-related Sat Sep 10, 2016 9:37 pm
by Deeps (deleted)
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Quote: Lily wrote in post #1

My question (eventually) is, what pressure should I have in the caravanne tyres, and how do I know if the weight distribution is correct. ?


Lily - I've highlighted the above quote from your post as it's a part that hasn't been replied to as yet. The handbook gives a figure of 100kg as the maximum weight that should be applied to the tow hitch. Correctly loading the caravan to this figure is generally considered to be the aim for achieving reliable stability. That said, the maximum figure given for your cars towball may well be more although more often than not - less than the figure quoted for the caravan. If the figure for the towball is in fact less - say 88kg as it is for my own vehicle - then this is the figure that you should aim to achieve. If the figure for the cars towball is higher then you should not under any circumstances exceed the 100kg figure quoted by Hymer for the hitch. There are a variety of ways in checking this following the loading of the caravan with some users preferring to use a set of bathroom scales whilst other purchase and use a nose-weight gauge manufactured by Milenco which is certified as having been calibrated http://www.milenco.com/products/noseweight-gauge/ . That said, as you have already mentioned, the Eriba is usually quite stable and your problem may well lie in a combination of things and not exclusively insufficient noseweight.

Correctly loading the caravan so that heavy items are low down and over the axle as much as possible. Equally important of course is an equal distribution of weight across the caravan i.e. the weight on both wheels being as equal as possible. Again it is possible to check this following loading of the caravan by purchasing drive-over scales produced by the company Reich. This video demonstrates there use. https://www.youtube.com/watch?v=CRp8GUDrvJc

I won't offer an opinion regarding tyre pressures because this is a minefield of a subject with some members having fixed opinions borne about by experience, whilst others follow various formulas that can be found on the internet. I myself tend to go along with the caravan manufacturers recommended pressures although even here there can be confusion. My own caravan came with a printed tyre pressure chart that was fixed to one of the bulkheads in the gas locker although the stated pressure for the commercial tyres fitted to my caravan were at odds to those given in the user manual. It has taken several emails and letters to Hymer head office to get a resolution to this conflict with the advice now given (in writing) that in effect what is stated in the manual should be strictly adhered to whilst not only should the label in the gas locker be ignored but will also be removed by the dealer when the caravan next goes in for it's annual test.
My advice in this area is to consider and judge all the opinions given and then you'll finally have to make your own choice.



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Last edited Sat Sep 10, 2016 9:41 pm | Scroll up

#8

RE: Inexperience !

in Anything Eriba-related Sun Sep 11, 2016 1:25 pm
by Deeps (deleted)
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Quote: hob wrote in post #3
......a normal troll will have an axle limit of 1000Kg an uprated one will have a 1200Kg axle.



Just for information purposes but what is printed in the 2016 brochure before me states that for the Troll series of vans one has a choice of either a 1300kg axle or a 1400kg axle. Our Troll is coming with the 1300kg axle which is more than enough for us.


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#9

RE: Inexperience !

in Anything Eriba-related Sun Sep 11, 2016 1:41 pm
by hob (deleted)
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Thanks Alan, not sure where my original info came from now.

This chart is from a 2004 manual

weights.JPG - Bild entfernt (keine Rechte)

And says 1200Kg

Guess they change things from time to time


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#10

RE: Inexperience !

in Anything Eriba-related Sun Sep 11, 2016 1:56 pm
by Taffy (deleted)
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That must have been scary, however it is advised to not hit the brakes in the circumstances and not speed up but to slow down to eliminate the snaking. I have only experienced this once or twice and very slight ant nothing like you mentioned as I felt it as soon as it started and my reason was to light in the nose as I had left me gas bottle run to and what I usually carried just inside the door I had removed. As soon as I packed it differently and had a heavy gas bottle all was well, but I found that with it being wrongly packed after 50-55mph she started to sway.

Also was told when I had my tyres changed on the Eriba to not go by the pressure not he tyre sidewall but to always follow the manual of the vehicle/caravan.



Last edited Sun Sep 11, 2016 1:57 pm | Scroll up

#11

RE: Inexperience !

in Anything Eriba-related Sun Sep 11, 2016 3:02 pm
by hob (deleted)
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Zitat
always follow the manual of the vehicle/caravan.



But only if you have the same tyres mentioned in the manual and only then if the manual is correct to start with (Eriba got it wrong a few years back)

The manual is about 15 psi too low for my light commercial tyres


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#12

RE: Inexperience !

in Anything Eriba-related Sun Sep 11, 2016 3:19 pm
by Taffy (deleted)
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Thanks Hob, I will go and check what I had fitted, as they were the same as what came off it, so will look. How long ago was the manual wrong I have looked in my 2008 manual and on an English version I downloaded.


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#13

RE: Inexperience !

in Anything Eriba-related Sun Sep 11, 2016 3:22 pm
by hob (deleted)
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Randa posted a link further up to the latest chart (courtesy of the French forum)


Tyre pressure chart from a 2004 Triton manual .......... note the escape clause I highlighted underneath (not sure if those are wrong or not?)

pressures.JPG - Bild entfernt (keine Rechte)


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Last edited Sun Sep 11, 2016 4:10 pm | Scroll up

#14

RE: Inexperience !

in Anything Eriba-related Sun Sep 11, 2016 4:45 pm
by Taffy (deleted)
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I have checked and I had 185/70R13 and inflated them to 35psi. When I was looking at tyres, I cam across the info that aid usually the tyres wall strength is loaded and usually is around or just over half of the axle weight making both tyres add up to around the load.

The tyres I have do have a maximum load of 530kg and my Triton is a 1000kg chassis.


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#15

RE: Inexperience !

in Anything Eriba-related Sun Sep 11, 2016 4:50 pm
by eribaMotters | 5.601 Posts

Ideally the combined max load rating of the two tyres should be 10% higher than the max axle load.
Also it is inadvisable to go much over the 10% as you are relying on some flex in the tyre wall to aid suspension, ie give a little.

Colin


eribaless at present, 4th eriba, a 2017 430 on order.
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