..........If you don't have/don't want the purpose built brackets and jack then I would advise you get a low profile trolley jack so you can get it under the axle as close to the wheel as possible.
Agreed, and if your spare wheel is carried on the Alko under slung wheel carrier ( terrible piece of kit) you do have to drive up one of the ramps as trying to withdraw the wheel carrier when the van is on a jack is a safety hazard.https://forums.practicalcaravan.com/threads/caravan-jacking.63985/post-544093
IMO.....a bottle jack is best for lifting a caravan.
Most caravanners carry ramps so in the event of a caravan flat tyre that tyre can be hauled up a ramp to obtain the necessary clearance for the bottle jack.
That's standard advice but every AWS technician and mobile tyre fitter I've used has done just that.DONT ever jack on just tge chassis rail, it will bend and break the galvanising.
My AWS tech does the same, but he has a rubber block between the Jack and the chassis rail.That's standard advice but every AWS technician and mobile tyre fitter I've used has done just that.
It’s called GSI! Get Someone In🤪On the occasiosn when the technician has had to change a caravan tyre, they have used either a bottle jack or hydraulic jack under the axle. Luckily now if we need a wheel change we do not require a jack.
It replaces the front and rear steadies and has jacks in the centre to raise the wheels. Standard fit on our caravan.The E and P system, where does it attach to the van , we are told don't try and jack your caravan with the Steady stays, which I agree with. So the E&P system must have extra support,? How is it done.
I made the mistake in getting a trolley jack. The problem was that it was only a 2 tonn (2000 kilo) Trolley Jack and full the caravan weighed 1575 and with the trolley jack pushed underneath the axle the jack lever was still quite a way underneath the caravan and it took an enormous effort to push down the 2 inches of travel to lift it. So I bought a 7.5 Tonn Bottle Jack for about £15 off eBay and its very good.There is specific jack, along with brackets for Bailey's. DONT ever jack on just tge chassis rail, it will bend and break the galvanising. If you don't have/don't want the purpose built brackets and jack then I would advise you get a low profile trolley jack so you can get it under the axle as close to the wheel as possible. A bottle jack is fine until you get a flat tyre, at which point it's too tall to fit underneath any other than the chassis rail (see above!)
As for wheel nut size, check tgey are all a standard hexagonal nut, my Bailey (2019) has WSL nuts that need a specific tool and cannot be undone with a standard socket. Earlier ones had a single WSL as an anti theft measure.