Does anyone know the size of the transmission drain plug on the B2920? It came off while mowing along with all the hydraulic fluid and now the tractor will not move. I think I will have to retap and larger drain plug. I had a thread about this a while ago and thought I had fixed it with a new drain bolt but obviously that didn't work. Any help would be much appreciated. Will probably try to call Kubota tomorrow but if anyone knows the size I thought I would ask.