May not be right but I would lower the front landing gear so the nose is low. Block the rear of the rig up with something suitable that can take the weight up to the frame, then run the landing gear back up. If it has stabilizer jacks I would not use them either, they are to flimsy for that amount of weight. This will take most of the weight off the tires. I would not take the tires completely off...does not sound very safe. You still would want to chock the tires to keep it from moving. You basically are trying to keep them from getting flat spots I assume? As mentioned before if at all possible, tow it a soon as possible to cycle the tires.