I was cutting the grass and the tractor suddenly stopped moving. I checked the engine and it was running fine. I took a look underneath the seat and found out the driving belt was broken. I called up Kubota dealer and was told a new one cost $71. I brought the old belt to Keswick Rental and I got a B84 V-belt for $32 (generic). I disengaged the mower and tried to put the belt one. It was so hard and tight to put the new belt on. Thank God my neighbour Henry saw me and offered help. He is a tool and die professional and is very good on mechanics. Together we fixed the tractor and it was up and running again. What a good experience for me.