Have I commited a sin?

[samleeds]

If you dump your water, leave the van empty, dont take the wife and spread the load from front to back by loading the passengers side and some between the seats, you should be able to load at least 500kg and if its only a short trip you wont bottom out the sprigs, so 3 or 4 trips max. The payloads are guides for longer trips as long as your inside the GVW you will be ok. These chassis are designed to take a hell of a lot ore than you think. Look at vans in the likes of India and the African nations, they are always well over laden. You just need to be carefull of the traffic police and drive inside your capabilities so as not to be dangerous.

 

[mariesnowgoose]

If you dump your water, leave the van empty, dont take the wife and spread the load from front to back by loading the passengers side and some between the seats, you should be able to load at least 500kg and if its only a short trip you wont bottom out the sprigs, so 3 or 4 trips max. The payloads are guides for longer trips as long as your inside the GVW you will be ok. These chassis are designed to take a hell of a lot ore than you think. Look at vans in the likes of India and the African nations, they are always well over laden. You just need to be carefull of the traffic police and drive inside your capabilities so as not to be dangerous.

:lol-049::lol-061::rolleyes2:

Can I do the reverse and not take t'other half instead?!

I've often used all manner of vehicles over the years to cart heavy stuff to and fro, you just use common sense and, like Sam says, spreading the load is a useful tip.

I've never been overly precious about vehicles, they get their fair share of knocks & wear & tear like the rest of us.

We had a distant southern Irish cousin who went out and got himself a brand new soft top Porsche.
The following week he went off to a cattle auction with 2 of his pigs strapped into the back of it.

So no, Beemer, I don't think you've committed any sin whatsoever. It's your vehicle, so you do whatever you want with it.

By the way - you did a grand job of cleaning the garage up afterwards, wish my other half was as tidy minded!

 

[Deleted member 12539]

Now I have had time to calculate:

I eventually done three trips.

I roughly counted 140 stones, an average stone weight of 11KG (bigger ones counting as two), means a total 1,540KG.
Divide that by three = an average of 513.3KG per trip.


This is a rough estimate of course.

 

[Deleted member 12539]

Which Clown recommended 80 psi all round. :lol-061:

And before you criticise me, I have been driving Tag Axle Motorhomes for a long time.

Euromobil

 

[Deleted member 12539]

Which Clown recommended 80 psi all round. :lol-061:

And before you criticise me, I have been driving Tag Axle Motorhomes for a long time.

Quoting the ALKO amc Handbook provided with the Euromobil:


215/75R16C Camping 5.5bar front and 4.7bar rear on vehicles over 4000kg (mine is 4.5t)

5.5bar = 79.7psi

4.7bar = 68.1psi

 

[Deleted member 12539]

Photos from the ALKO amc Handbook:
Although the tyre pressure table states 3.5bar for the rear, the Information on the following page (as I understand it) says air pressure on the rear axle must be increased to 4.7bar.
I have only been driving this vehicle for 4.5 years, and had the tyres at 80psi all round when fully loaded, with no apparent problems of handling or undue tyre wear.

 

[samleeds]

Now I have had time to calculate:

I eventually done three trips.

I roughly counted 140 stones, an average stone weight of 11KG (bigger ones counting as two), means a total 1,540KG.
Divide that by three = an average of 513.3KG per trip.


This is a rough estimate of course.

thats bag on, well done

 

[Canalsman]

You say you are using 80psi all round. This contradicts the confusing recommendations however they are interpreted.

I would expect the rear axle pressures to be quite low. This is because the rear axle load is spread over four tyres rather than two. The tyre pressure required in any given situation is determined by the load that the tyre is expected to bear.

The correct way to ascertain the pressures is to either use this web page:

Motorhome Tyre Inflation Pressure Advice | TyreSafe - Promoting UK Tyre Safety and Driver Awareness

Or, in my opinion, the better option is to refer to the tables in this document:

https://www.tyresafe.org/wp-content/uploads/2015/12/motorhome-leaflet.pdf

Whichever way you do this you need to weigh the vehicle to ascertain the axle loads.

 

[Deleted member 12539]

You say you are using 80psi all round. This contradicts the confusing recommendations however they are interpreted.

I would expect the rear axle pressures to be quite low. This is because the rear axle load is spread over four tyres rather than two. The tyre pressure required in any given situation is determined by the load that the tyre is expected to bear.

The correct way to ascertain the pressures is to either use this web page:

Motorhome Tyre Inflation Pressure Advice | TyreSafe - Promoting UK Tyre Safety and Driver Awareness

Or, in my opinion, the better option is to refer to the tables in this document:

https://www.tyresafe.org/wp-content/uploads/2015/12/motorhome-leaflet.pdf

Whichever way you do this you need to weigh the vehicle to ascertain the axle loads.

The recommendations were quoted from the AL-KO amc Handbook, and it seemed quite clear to me, although I am always willing to take advice (not abuse) on board, and I will certainly read the links Chris, thank you.


The axle loads quoted in the AL-KO book state MAXI 4500 Permitted front axle load 1850kg and Permitted rear axle load 2 x 1500kg. I read that as 3000kg rear axle load.

One day I will get to a weigh station and find out just how much we do weigh, but I am aware that this vehicle is well under weight for a tag axle.

I don't know of any other tag axle motorhome that is less than 7m long (someone else may know though), ours is 6.9m with less than a metre overhang at the back, obviously designed to take weight.

 

[Canalsman]

Based on the maximum axle loadings you quote these are the pressures suggested by Tyresafe are:



This indicates that you are over-inflating your tyres by a big margin. Furthermore the actual axle loadings will be lower so the pressures will be lower still!

 

[maingate]

Quoting the ALKO amc Handbook provided with the Euromobil:


215/75R16C Camping 5.5bar front and 4.7bar rear on vehicles over 4000kg (mine is 4.5t)

5.5bar = 79.7ps

I have the same AlKo chassis with 225/65R16CP tyres, motorhome rated at 4.5 Tonne MAM. After putting it on a weighbridge to get the axle weights I run it at 50 psi Rear and 65 psi Front (which is still above the pressure quoted in the Tyresafe guide but a compromise between comfortable driving and long stationary periods). Anything higher gives a very uncomfortable ride and you must bear in mind that when the tyres warm up the pressure will increase by at least 5 psi. Torsion Bar axles are different to Cart Spring axles and Tyre Pressure is much more important to get a comfortable ride.

The AlKo handbook (I have one as well) might give theoretical figures but in the real World they are not practical and should be ignored. If you put your maximum axle weights (1850 and 2 x 1500) into the tyresafe guide in the link, you will find that you are running at far too high pressure. You might think me abusive but if you never try it, you will never find out.

 

[Deleted member 12539]

Based on the maximum axle loadings you quote these are the pressures suggested by Tyresafe are:

View attachment 65624

This indicates that you are over-inflating your tyres by a big margin. Furthermore the actual axle loadings will be lower so the pressures will be lower still!

As I see.. according to Tyresafe…….. however AL-KO states different.




It clearly prints the Maxi Camping as requiring 5.5bars for the front axle which is 79.77psi, and the rear at 3.5bars which is 50.7psi, and then the info I mentioned in a previous post regarding the increase in air pressure for over 4ton, to 4.75bars (68.8psi).

I think an email to Euramobil may be in order to sort out what air should be in the tyres.

To date I have had no tyre issues and very impressed with the way the vehicle can corner and its behaviour in high side winds.

 

[Canalsman]

By all means ask Euramobil.

However to establish the correct pressures is just a matter of Physics. The tyre's ability to carry a given load is determined by how much it is inflated.

You will find a huge difference in ride comfort by reducing the pressures to the optimum for their load ...

 

[wildebus]

Based on the maximum axle loadings you quote these are the pressures suggested by Tyresafe are:

View attachment 65624

This indicates that you are over-inflating your tyres by a big margin. Furthermore the actual axle loadings will be lower so the pressures will be lower still!

As we are talking Tyre Pressures now and not stone carrying on this thread, going to ask a question that is associated ....

What is the difference in Tyre Pressure recommendations at the rear for a Dually compared to a Tag Axle? Obviously both have 4 tyres at the back but differently arranged - how (if at all) does that change the tyre pressure recommendations?
I'm wondering if I have my (dually) rears overinflated after reading some comments here?
Running at 70PSI all round on my van which in running 'going away' spec weighs in at around 3900kg (with a GVW of 4600kg). Thoughts?
(I have always taken my vans to get weighed after making any significant alterations as I feel it is very important to know not just you are not overloaded, but what weight you actually are at for tyre pressures - but never had a '6 wheeler' before)

(right now both my fronts actually look a bit low but haven't rechecked the actual pressure yet).


UPDATE:
looking at the PDF, and for my tyres (215/70R15 CP109) with front axle 1750 and rear axle 3200, looks like my pressures should be no more than 58PSI - is that correct?

 

[SteveB48]

Thanks Admin for the links to Tyresafe.
First time I’ve found decent information on pressures for our Transit-based Autohome.
Their recommendations are near to what I’ve been using, but nothing in the vehicle or conversion handbooks gives much help.
On a separate note, I’ve destroyed two tyre inflators getting the rears to 65psi!

 

[shaunr68]

I have the same AlKo chassis with 225/65R16CP tyres

Following this thread with interest as I'm picking up a new to me MH on Friday which has CP tyres and the bottom of the Tyresafe page states:

"CP-type tyre construction enables the use of higher inflation pressures to provide resistance to the difficult conditions of use encountered on motorhomes. Therefore, when CP-type tyres are fitted on the rear axle in a single formation set the inflation pressures to 5.5 bar (80 psi) for all loads"

 

[Trotter]

All the poor sod was trying to tell us was he'd been given some stone, and he wanted to get it home. Agreed or not, he's been a bit of a daft bu**er. What he has done doesn't deserve all this grief.

A little hint, anything Charlie says, is usually just, taking the P. Although I did like the Salmon bit.

A sin, Of course it is. Fortunately, I'm available to take confessions at reasonable rates. Just call me Father. No, I'm not yer Dad

 

[shaunr68]

Yes it enables a higher pressure, but that doesn't make it a good idea. It isn't a good idea.

The concluding sentence is perfectly clear:

"Therefore, when CP-type tyres are fitted on the rear axle in a single formation set the inflation pressures to 5.5 bar (80 psi) for all loads"

I don't have a horse in this particular race and I would have previously have viewed 80 psi as excessively high. However Tyresafe quite clearly state that CP tyres on the rear axle should be inflated to 80psi for all loads.

 

[wildebus]

The concluding sentence is perfectly clear:

"Therefore, when CP-type tyres are fitted on the rear axle in a single formation set the inflation pressures to 5.5 bar (80 psi) for all loads"

I don't have a horse in this particular race and I would have previously have viewed 80 psi as excessively high. However Tyresafe quite clearly state that CP tyres on the rear axle should be inflated to 80psi for all loads.

The tyresafe on-line calculator and the tyresafe PDF vary significantly in the advice for CP tyres - at least the way I read it.

 

[wildebus]

109=1030KG
If your front axle has a load of 1750, each tyre carries 875KG so the pressure should be 875/1030 of the maximum written on the tyre. That may be 65 or it may be 80, or indeed it may be another mumber. But whatever that number is, that's the one to use for this calculation. If it is 80, the correct pressure is 68. If it is 65, the correct pressure is 55psi.

For the rear, either your tyres are overloaded, or you have twin wheels at the back. Assuming twin wheels, for extra safety I'd de-rate the load index to 107 (1000KG) - but you don't have to officially, so each is carrying 800KG out of a max 1000KG, so the pressure should be 800/1000*80 = 64 or it should be 800/1000 * 65 = 52psi

Interesting. Pretty sure the max PSI on the sidewall is 80. And yes, have dual/twin wheels.