perhaps implying that several jacks share the total load? and put them on each other - this smacks of a madhouse 
and if in parallel - in principle it should work. in real life, you can do - just find a way to synchronizes their work, but if you think about it, nothing is impossible.
maybe it would be nice to provide for such a scenario. to a person in the inventory or adjacent units was 10 jacks to 3 tons each. and the total force - will succeed
BUT
lucky you - you just have to change the wheel.
and I need to move the whole machine. assort - machine is very large. Fortunately, this is not a tank 
and I-boom crane, unfortunately, not an assistant.
and I do not know what to think of.
loader - also did not help.
It may be there for me for a decision?
maybe the game has such a pleasant thing as a winch?
Well, not winch, let it be a tow rope.
well at least the rope for towing in the game have?
stretch road blockages can make it.