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620 I Gator - getting fuel in crankcase oil
I have a 620I gator that is getting fuel in the oil. I spoke with a JD tech and he said it is possibly from short trips and not getting it to operating temps. He said the book says to change the oil if the level increases to 3/8" over the full mark. I changed the oil and monitored it. I got around 1/2" over the full mark in 2 hours of operation. Just wondering if anybody has any other ideas. Possibilities - fuel injectors, air temp sensor, pressure sensor??
Thanks for helping
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620 I Gator - getting fuel in crankcase oil
Yes this is a fuel injected gasoline model. The book reference I spoke of is a JD technical bulletin/solution that a JD tech rep read to me. It was not in the owners manual for the machine. Let me know if you have any other ideas.
Thanks
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620 I Gator - getting fuel in crankcase oil
It seems to run alright and does not miss. The only thing I have noticed is that it does not start as quickly as it did in the past. It will turn over just a few times before it starts now. In the past it seems like you just touched the key and it was runnning no matter what the air temp was. It has around 290 hours on it now.
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620 I Gator - getting fuel in crankcase oil
Thanks for the info. It does not show any codes and the JD tech guys are stumped also. The rise in the crankcase fluid/oil is excessive. The original reason we found the problem was when my wife said she had white/blue smoke pouring out of the exhaust. I checked the oil and it was around 1 1/2" to 2" over full. She must have turned on a slope and some oil got splashed into cylinder?? Any how it had around 30 hours on an oil change and I drained out around an extra 3/4 of a quart of fluid. I ironically drained it into a few "Gatorade" bottles that I had in my pickup so I had a pretty good idea of the amount. JD tech guys said to pull injectors and have them checked. If they come back ok it sounded like we would start throwing parts/sensors at it until we fix it. Let me know if you have any more thoughts on this.
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620 I Gator - getting fuel in crankcase oil
Thanks to all for the replies. To answer a few questions - the oil did smell of gas and unfortunatly I did not save it. It went into the used oil barrel. I checked the coolant and it was ok. The oil on the dipstick initially was so clean and thin it was hard to see. It must have cleaned out the crankcase well because the new oil since is still extremely clean. To Gatoraide - Thanks for doing some research. The injectors are being tested today. I hope I don't have to hone the cylinders every 18 months. That sounds like it might get pricey. Is the theory that the cylinders are glazed due to shorts trips/ putting around. Would a leak test indicate this or is it just at top of compression stroke as you said. Maybe I should trade it for a new diesel model.
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620 I Gator - getting fuel in crankcase oil
They are scratching their heads too. I have gotten more information from you (Gatoraider) than them so far. I am still waiting for the verdict on the injectors. I will keep you posted.
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620 I Gator - getting fuel in crankcase oil
Yes I think we figured it out. JD ran several tests on it searching for the problem. They replaced the entire throttle body on it. I have not put that many hours on it since but it seems to have fixed the problem. They said it was possibly an electrical issue with the unit causing the problem.
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