This idea was brought up by USA#1 in the Repairing a burned Bobcat S250 thread.
I used this chart http://www.tracksandtires.com/skid-steer-tire-sizes.html to get an idea of the wheelbase range that I would need to deal with. It looks like 35" to 50" will cover most anything I would be working with. There are some smaller machines and some larger but they are outside the window that I would be interested in. Some modification could be made to work with the others if that is what you have.
Here is what I have in mind. Hopefully you can see what I am thinking between the description and the picture. If anyone sees something that they think will be a problem bring it up so it can be worked out before it is built so it doesn't have to be redone. The round would bolt to the hub of the machine. It could be cut from some steel plate or be made from an old wheel. The piece coming from the round to the square to stand it off would be 6-8 inches and made from either pipe or square tube, I would use whichever one I had available. The hub would bolt to the square. Between each of these I would run two pieces of pipe or tube that would slide together to keep the hubs squared. They would adjust to whatever wheel base you were dealing with and could be clamped together with a couple T handle bolts, the arrows in the picture.
The hubs could come from trailer axles or rear hubs from a front wheel drive car. I don't think it would have to be extremely heavy duty as this would only be used to load a dead machine on the trailer or to move it into a shop.
I have at least five months before I can even hope to start this so I am open to any thoughts you may have. It has been 30-40 below zero here for the past week and a half so I wouldn't be messing with it now even if I had the stuff to do it. It has warmed up to 20 below tonight but still a long way from messing around outside weather.
I used this chart http://www.tracksandtires.com/skid-steer-tire-sizes.html to get an idea of the wheelbase range that I would need to deal with. It looks like 35" to 50" will cover most anything I would be working with. There are some smaller machines and some larger but they are outside the window that I would be interested in. Some modification could be made to work with the others if that is what you have.
Here is what I have in mind. Hopefully you can see what I am thinking between the description and the picture. If anyone sees something that they think will be a problem bring it up so it can be worked out before it is built so it doesn't have to be redone. The round would bolt to the hub of the machine. It could be cut from some steel plate or be made from an old wheel. The piece coming from the round to the square to stand it off would be 6-8 inches and made from either pipe or square tube, I would use whichever one I had available. The hub would bolt to the square. Between each of these I would run two pieces of pipe or tube that would slide together to keep the hubs squared. They would adjust to whatever wheel base you were dealing with and could be clamped together with a couple T handle bolts, the arrows in the picture.

The hubs could come from trailer axles or rear hubs from a front wheel drive car. I don't think it would have to be extremely heavy duty as this would only be used to load a dead machine on the trailer or to move it into a shop.
I have at least five months before I can even hope to start this so I am open to any thoughts you may have. It has been 30-40 below zero here for the past week and a half so I wouldn't be messing with it now even if I had the stuff to do it. It has warmed up to 20 below tonight but still a long way from messing around outside weather.