Had a recent experience with my B3350SU. The tractor went into a Parked Regeneration mode, after it finished Regenerating it would start all over all by itself. This happened 3 time in a row and it still wanted to do another Regeneration. I shut the Tractor off and waited till the next morning and tried again. When I started the tractor it went into Parked Regeneration and preformed 3 more Regeneration cycles all by itself and then I shut it off and called the Dealer. I took the tractor the the Dealer the next day. The tractor sat in the back lot before the Dealer could get a look at it. It rained off and on for the time it was in his back lot. The mechanic hooked the tractor up to the computer and it verified the tractor had gone through 6 unsuccessful Regeneration cycles. The mechanic then tried a forced Regeneration and the computer indicated the Diesel Particulate Filter was clogged and needed to be replaced. Dealer Called Kubota and they sent a person out to look at the tractor. They took one look at the tractor and said you have water in the fuel, new Diesel Particulate Filter would not be covered under warranty. No one know how water got into the fuel. The Dealer drained the fuel tank, filled with fresh fuel. Started the tractor and Regenerated with no problem. It did take over an hour to complete the Regeneration. We had more rain before I could pick the tractor up from the dealer. All this time the tractor had been sitting on the trailer I used the get my tractor to the dealer. When I got home I drove the tractor off the trailer and got about 30 feet and the tractor engine died. It would not restart. I looked at the fuel filter and the site glass was full of water. I drained over a cup of water from the fuel tank. Tractor stated up and has been working great since and Regenerating without a problem. Where did the water come from.
The only thing me and the dealer could think of was when it rained the fuel tank cooled and as the water from the rain ran over the fuel cap, the water was sucked up the vent and into the fuel tank. My tractor has always been under cover and was never out in the rain until I took it to the dealer. A few weeks after this all happened I deliberately left my tractor out in the rain. You guessed it, when I stated the tractor water quickly replaced the fuel in the fuel filter bowl. Somehow when it rains water is getting sucked up under the fuel cap. The dealer called today and they ordered me a new fuel cap to see if that solves the problem. The fuel tank was pressure tested and no leaks were found.
The only thing me and the dealer could think of was when it rained the fuel tank cooled and as the water from the rain ran over the fuel cap, the water was sucked up the vent and into the fuel tank. My tractor has always been under cover and was never out in the rain until I took it to the dealer. A few weeks after this all happened I deliberately left my tractor out in the rain. You guessed it, when I stated the tractor water quickly replaced the fuel in the fuel filter bowl. Somehow when it rains water is getting sucked up under the fuel cap. The dealer called today and they ordered me a new fuel cap to see if that solves the problem. The fuel tank was pressure tested and no leaks were found.