Jacking up a caravan

The axle. Use a soft block of wood about 1" thick and it will distort enough to grip the axle.

The axle is bolted to the chassis on a large "L" shaped bracket.The best place for a trolley jack is under this bracket.Access can be hindered because a mover or mud flaps are in the way!If a mover has been fitted in front of the wheels enter from the rear!

Says it all, DS 

Tow the wheel up your ramp which will give more space to pump the trolley jack handle.

What nobody has mentioned, only use a trolley jack on a hard level surface, never use it on grass. When you use a trolley jack to raise something, the jack moves on the wheels and if it cannot move, it becomes unstable.

Under the bracket.

I agree, so make sure you carry a strip of 25mm thick wood or such like, 1.25 times longer than the length of the jack.

Far too often in life I come across situations where people make a bit of a rod for their own back. The couple who won't shop in Lidl 'because it's a cheap shop'. My elderly stepmother who refuses to have an email address even if she never uses it. And now we have a member who doesn't really want to buy a proprietary jacking system for their caravan. You can buy a Purpleline kit which includes chassis brackets and a their suitable bottle jack which will stand on a levelling board, if required, for under £85. What price an easy very workable  roadside or field solution in an emergency.

Probably because at £85 the jack system is way overpriced, you can buy a 'normal' bottle jack for £9.99 from quite a number of places. This makes the brackets £37.50 each and as it has been pointed out, you do not really need the brackets.

I agree with both Jennyc & hortimech, but its all down to what the user feels confident to use.

althought I carry the supplied alko jack, if I had the need to change a wheel whilst on the road, I would use the services of mayday. It's part of the service I pay for and they are proficient in changing the wheels in a safe and timely manner.

fortunately, if I want to jack up a wheel on site to fit the wheel lock I can use the onboard E&P levelling system that my caravan has fitted.