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