a pair of adjustable pliers,isolate the POWER then  isolate BOTH of the WATER SUPPLIES before attempting to undo the H/C connections on the rear of the old machine, when  both pipes disconnected now drain MOST of the water out of the machine by lowering the drain hose into a low bowl container, when stopped  take machine outside.
New machine will come with NEW HOSES If happy reuse the old one  but use new rubber washers,( keep new as spares)
                
 wirecutterman
                
 April 2009