Jack stands should be placed at the mounting plates as well, but that is not how I would do it. It would be alot safer and easier to build ramps out of 2X6's and tow the trailer onto the ramps. Chock the wheels when they are on the ramps and you are set. I have a 2 sets of Lynx Levelers that let me build ramps for leveling when camping. They are lego type blocks and they work great also.
I have recently purchased a 1996 AS 30 Ft Excella. Can anyone assist with the size of pole jack to change a tire? They are sold in 2,4,6,8 ton etc. My GVW is 8300 Lbs. I was thinking of a 6 ton. I am aware of the AS method of using 2X8 boards but wanted to get a jack just in case.
Welcome! Hope that your 'new to you' AS gives you as much joy as nearly everyone here gets out of thier units!
As to jacking, for tire replacement, bearing work, or whatever - be sure to use the 'Search' button in the upper right corner, as there is a LOT to know about jacking AS's, and just as much to know that is WRONG about jacking AS's...!!! Knowing the particulars can save a lot of time, aggrivation and $!!!
I would say that a 6T should easily handle nearly all your AS jacking needs, but then a 8T is only a few $ more, not significantly larger, and can certainly handle anything that the 6 could do and then some..... Not that more is better!?!
Just be sure that you know where to jack and then do it safely! Enjoy.
I would try to test the bottle jacks before you buy. Sometimes they have the same size pump and different size hydraulic cylinders.
This means the larger capacity jacks require a lot more pumping strokes to raise the jack the same distance. That and the fact that the larger jacks are heavier and harder to muscle around leads me to recommend you get the smallest one that will do the job.
Under ideal conditions, I think a 2T will probably work. Get the 4T to be sure.