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dirtgeezer
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Discussion Starter · #1 ·
I had been working my 2006 L3400 for about 15 minutes did some dirt pushing with FEL just a couple of minutes for a neighbor 1/4 mile over and back, decided to pull some gravel back on the road from sholder with the rear blade at home. I was working on a slope left side high, decided to cross road (blade raised) and when I went down in ditch Left side down I heard a racket like something in a cylinder, white smoke came out of the exhaust and engine acted like it was chokeing down and wanted to die, backed up decided to limp back home, but after several feet the engine picked up and ran fine back to house. I killed the engine, couldn't find anything different and oil was still full. got back on and engine started up and ran fine.

Question: What the heck happened?
Maybe I got some water in the injectors from the fuel or what?

I think the time is close for an oil change and fuel filter cleaning, anything I need to look at real close? Thanks,
 

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White smoke's a sign of unburnt fuel/oil, the racket you heard was the excess fue/oill in the cylinder. Any chance you could have been at such an angle that you started sucking in engine oil into the intake somehow?. It's scary because that's a good possabality of a runaway (def. http://tinyurl.com/7z5yzob ), if so, you're lucky it choked rather that accelerating....Mike
 

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dirtgeezer
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Discussion Starter · #3 ·
Thanks for the reply Mike
Yes, it could have been the fast turning back to the left and dropping down as I crossed the ditch, because that is when it happened. The crankcase was up to the full mark. and maybe it choked down because I was in 3rd gear and a fairly slow engine speed, I let off the foot feed as I turned.

Back a lot of years ago I watched an 8 cylinder stationery Cat engine blow up after it threw a governor weight and ran away, cutting the fuel line didn't help. the mechanic said it began sucking crankcase oil into the cylinders and running on it, till it blew up scattering parts all over.
 

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How much fuel did you have in the tank? I'm wondering if it was low enough to slosh to one side and pick up some air. I would check for water in the filter when you drain it. It would take a lot of water in it to cause a problem. I don't see a Kubota getting oil in the intake. I wouldn't rule out any thing though. Strange things can happen.
 

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dirtgeezer
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Discussion Starter · #6 ·
How much fuel did you have in the tank? I'm wondering if it was low enough to slosh to one side and pick up some air. I would check for water in the filter when you drain it. It would take a lot of water in it to cause a problem. I don't see a Kubota getting oil in the intake. I wouldn't rule out any thing though. Strange things can happen.
I didn't have quite a half tank of fuel. I will change out the fuel filter.

Do you reckon I dodged the bullet and the engine probably didn't suffer permanent damage?

BYTW if if fill the filter up with fuel when I put it back on will I still need to bleed the fuel line and injectors, as per the Kubota manual?

Thanks for the replies, I haven't ever owned a Kubota before this one, it is a heck of a powerful little tractor, much more than the old Ford 8N my Dad had, and the Fergesons that I grew up with.
 

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dirtgeezer
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Discussion Starter · #7 ·
...Well since that one big burp the tractor seems to be running normally.
 

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BYTW if if fill the filter up with fuel when I put it back on will I still need to bleed the fuel line and injectors, as per the Kubota manual?
There's a cut-off in the fuel system that sorta stops flow when you remove the bowl. I just changed my fuel filter on an L3700 (virtually the same engine) and even though I lost a pint or so in a bucket when the bowl was off, after replacing empty, it quickly filled and started first time without bleeding.

Be careful with the O rings. One on the OD of the filter bowl is obvious but there's a tiny one at the center which takes a pin prick to remove and if you don't get this back in place, you got problems. New O rings do NOT ship with the new element.

Best of luck discovering your problem.....
 
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