LX3310 Out of control rpms even after shut off

lugbolt

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ZG127S-54
Oct 15, 2015
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they call that a runaway

about only a few things can cause it. It's getting artificial fuel, or runnin on it's own oil.

best way to shut one down is to cut off it's air supply, via your hand over the filter inlet, or collapse the rubber intake tube like what Iv'e had to do in the past.

something that always bothered me about more modern diesels. The epa doesn't like crankcase fumes to get into the atmosphere so most diesel engines re-route the crankcase vent back to the air intake, either pre-turbo on the forced induction engines or in the intake manifold on most of the naturally aspirated ones. But there's a problem with that. If for some reason the engine is overfilled with oil, or is rolled over, oil can enter the intake and due to the design of the engine it will run on it's own oil. Thus, say, you're mowing a hillside or whatever, tip the tractor over and you're throwed out of the seat. The bush hog blades are now capable of spinning mach jesus because the engine is running on it's own oil and will NOT shut off unless it's air supply is cut. Seat switch won't do a bit of good, key don't work, only thing that works is shutting off it's air or waiting til it runs out of it's "fuel" (or oil)...or the engine self-destructs. Whichever comes first.

I've seen it happen a few times, too. One was a loader operator that had the load way up the air and tumped the tractor on it's side (straight gear transmission), and it went into runaway, and just keps trying to run the guy over until it finally kicked rods out of the block and killed itself.

always hated that style CCV, needs a separator to keep oil out of the intake to prevent runaways.
 
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scottparrish

Member

Equipment
LX3310 hst, Pete’s quick hitch, tiller, boxblade, grapple, rake,
May 4, 2024
41
13
8
Parrottsville TN
they call that a runaway

about only a few things can cause it. It's getting artificial fuel, or runnin on it's own oil.

best way to shut one down is to cut off it's air supply, via your hand over the filter inlet, or collapse the rubber intake tube like what Iv'e had to do in the past.

something that always bothered me about more modern diesels. The epa doesn't like crankcase fumes to get into the atmosphere so most diesel engines re-route the crankcase vent back to the air intake, either pre-turbo on the forced induction engines or in the intake manifold on most of the naturally aspirated ones. But there's a problem with that. If for some reason the engine is overfilled with oil, or is rolled over, oil can enter the intake and due to the design of the engine it will run on it's own oil. Thus, say, you're mowing a hillside or whatever, tip the tractor over and you're throwed out of the seat. The bush hog blades are now capable of spinning mach jesus because the engine is running on it's own oil and will NOT shut off unless it's air supply is cut. Seat switch won't do a bit of good, key don't work, only thing that works is shutting off it's air or waiting til it runs out of it's "fuel" (or oil)...or the engine self-destructs. Whichever comes first.

I've seen it happen a few times, too. One was a loader operator that had the load way up the air and tumped the tractor on it's side (straight gear transmission), and it went into runaway, and just keps trying to run the guy over until it finally kicked rods out of the block and killed itself.

always hated that style CCV, needs a separator to keep oil out of the intake to prevent runaways.
Yeah. Scary for sure. I was thinking something might blow in the engine and go through me but I felt I had to try to shut it down.
now I know it doesn’t matter key on or off.
tomorrow I’ll go to the big city for errands and stop into kubota and see what they say. I think I’m running out of warranty years.
I’ll have to read the fine print of our “extended” warranty
 

North Idaho Wolfman

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Jun 9, 2013
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WOW, that is the first run away Kubota I've ever seen, they are definitely not know for that.

How many hours are on it?
Are you using it for commercial use?
Did you buy it new or used?

The sad part is that not only is the engine going to have issues from it doing that, the emissions system will be a total loss and need replaced.
 
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#40Fan

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Jul 21, 2022
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That sucks, but the "new regen process" line was hilarious.
 
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scottparrish

Member

Equipment
LX3310 hst, Pete’s quick hitch, tiller, boxblade, grapple, rake,
May 4, 2024
41
13
8
Parrottsville TN
WOW, that is the first run away Kubota I've ever seen, they are definitely not know for that.

How many hours are on it?
Are you using it for commercial use?
Did you buy it new or used?

The sad part is that not only is the engine going to have issues from it doing that, the emissions system will be a total loss and need replaced.
I bought it new in 2021? I think.
It’s just our homestead tractor not commercial
Off the top of my head I believe just over 500 hours.
Kubota did $5000 in warranty engine repairs last year due to a no engine horse power issue. Replacing injectors and a bunch of stuff they called the “top end” which a moderator said was not a top end job when I posted the last issue here
I’ll post what they say tomorrow but I don’t think I’ll have any definitive information until it gets picked up and diagnosed which will be a while I’m sure. It’s hay season
 

scottparrish

Member

Equipment
LX3310 hst, Pete’s quick hitch, tiller, boxblade, grapple, rake,
May 4, 2024
41
13
8
Parrottsville TN
I went to Kubota today showed them my video.
they said they’ll get it tomorrow and a new engine shortly after
 
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whitetiger

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Kubota tech..BX2370, RCK60, B7100HST, RTV900 w plow, Ford 1100 FWA
Nov 20, 2011
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Kansas City, KS
Kubota did $5000 in warranty engine repairs last year due to a no engine horse power issue. Replacing injectors and a bunch of stuff they called the “top end” which a moderator said was not a top end job when I posted the last issue here
I think you stated that it had an "engine overhaul". See your post below.

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