We slide them around on plastic ski's and soapy water..(my wife's idea)..works great..I've moved a 60 ton Iron worker this way..(it didn't weight 60 tons..more like 3 tons).
You just use a pry bar and some blocks to get it high enough to slip the ski's under and away you go..
These are available at any snowmobile shop..the thin plastic ski covers work best..
Or you could make some out of UHMW PE ..and just heat the ends to form a curved tip and tail...about 4 to 6 inches wide and the length of the machine base..
The weight of the machine keeps them under it..a little soapy water and one guy can push the machine any place he needs to..that is if the floor is ever close to smooth..now a heavy broomed concrete floor might pose problems..
Kind of the same thing as those plastic "Furniture Movers"
As Seen On TV 
Linky:
http://www.thesnowmobilestore.com/ac...8217&CATID=308