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To minimise weight an Al-Ko chassis is very flimsy so I would only use this sort of device under the axle plate and not the chassis. The problem is the caravan wheel hides the axle plate somewhat and makes the operation very difficult.

Land Rover on SORN so not towing anything for a while

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On 19/10/2019 at 00:56, onewheelonmywagon said:

To minimise weight an Al-Ko chassis is very flimsy so I would only use this sort of device under the axle plate and not the chassis. The problem is the caravan wheel hides the axle plate somewhat and makes the operation very difficult.

 

As said caravan chassis are very thin material be they have strengthening plate where the axle meets the chassis to spread the strain . This plate is slightly thicker and can be used if you can get under it but usually it is covered by the movers . Lifting under the chassis can crush the chassis in the immediate area or the strain can twist the chassis or body and open seals .

 

Only garanteed safe area to lift is under the axle .

 

 

Dave

Edited by CommanderDave

Jeep Commander 3. 0 V6 CRD

Isuzu D- Max Utah Auto

Elddis Crusader Storm 2000 Kgs, Unipart Royal Atlas Mover .

 

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20 minutes ago, Bolingbroke said:

 

What do you mean by the axle plate?

 

What I call the axle plate is at each outer end of the axle tube. The suspension/wheel hub slots into it and the chassis is bolted to it.

The picture below shows an axle taken out of a chassis. The axle plate is the flat end with holes in it.

 

Renovated-IRS-Axle.jpg

 

Edit: With thanks to Fraser Brown Engineering for the photo.

Edited by onewheelonmywagon
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Land Rover on SORN so not towing anything for a while

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They have now started to produce a newer chassis now under some caravans that is even lighter and full off lightening holes  and even weaker .

 

 

 

Dave

Jeep Commander 3. 0 V6 CRD

Isuzu D- Max Utah Auto

Elddis Crusader Storm 2000 Kgs, Unipart Royal Atlas Mover .

 

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42 minutes ago, CommanderDave said:

They have now started to produce a newer chassis now under some caravans that is even lighter and full off lightening holes  and even weaker .

 

 

 

Dave

 

Apparently these new lighter chassis are made in Switzerland...

 

 

swiss_cheese.jpg

Edited by Guest
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29 minutes ago, CommanderDave said:

They have now started to produce a newer chassis now under some caravans that is even lighter and full off lightening holes  and even weaker .

 

 

 

Dave

I doubt its any weaker, in fact it is likely to be stronger if anything. They have removed the overlapped and bolted joint between the 'C' section and the 'A' frame and that's good.  In a single move that has reduced weight considerably at no detriment to the performance. They obviously now have the ability to make the tapered  'A' frame and 'C' section in one go.  Al-Ko are likely to be using Finite Element Analysis and other forms of solid modeling with real stress data, techniques which improve accuracy of the design process a lot. The existing design was done 'donkeys years ago' when these techniques were rarely used other than for Aero Engineering. No doubt this change was motivated by reduced manufacturing cost so good luck to them.   

Ern

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On 20/10/2019 at 12:20, LeadFarmer said:

 

Apparently these new lighter chassis are made in Switzerland...

 

 

swiss_cheese.jpg

 

Now that I've got rid of the ants, mice are gonna be the next problem.

 

Dave

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