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Kubota Diesel Issues..


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#1 skyrydr2 ONLINE  

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Posted February 15, 2014 - 06:07 AM

Well with all this snow my little d600 is getting the workout from hell!! And it does not like it!!!!! First the systems; I have to have the return line from injectors closed off.
Second ; it will stall when left to idle under 1/2 throttle...
Third; it has no power( its getting close to being replaced with a vtwin kohler its so guttless)
4th; I don't think the governor works.... It never responds well to a load....
And the first few symptems started this fall.
Im going to replace the fuelpump today with an electric unit and hope it cures these issues otherwise.... It will find itself in the scrap pile i have no patients for trouble, especially when you need it to work!!!!!!!!!!

#2 trowel OFFLINE  

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Posted February 15, 2014 - 06:31 AM

Wait, wait, hold on, before you chuck it, i am also digging my way out of this snow storm right now.

Let me have a look at it first. I am in Ashfield Mass, not too far from you, PM me.

Will be very busy this weekend with snow removal, if you have another tractor or snow thrower use that for the moment.


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#3 JDBrian OFFLINE  

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Posted February 15, 2014 - 06:37 AM

It sounds to me like you don't have enough fuel pressure and/or volume. I think you are on the right track with a new pump. If the pump is weak the governor will not be able to compensate for load so this may be the root cause of your lack of power.  


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#4 skyrydr2 ONLINE  

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Posted February 15, 2014 - 07:27 AM

This is my first thought as well. I checked fuel delivery at the inlet to the pump and it flows like a you are pouring from a measuring cup!!
So flow from the tank is good. I have been wanting to do this for a long time but never really needed to until now. Trowel thanks for the offer and if this doesnt work I might take you up on the offer.
What stinks is this ia my only front attaching machine. My 125 only has attachments for the rear.

#5 olcowhand OFFLINE  

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Posted February 15, 2014 - 08:22 AM

Sounds much like the John Deere F935 that I bought a while back.  It had good fuel flow, but was also getting air in the suction line.  It would run at high rpm's but with no power.  Drop the rpm's by the throttle or load, and it would fall on it's face & die.  Turned out a bad suction line in the tank, but yours could be pulling air at the mechanical pump too.


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#6 HowardsMF155 OFFLINE  

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Posted February 15, 2014 - 09:14 AM

This is my first thought as well. I checked fuel delivery at the inlet to the pump and it flows like a you are pouring from a measuring cup!!
So flow from the tank is good. I have been wanting to do this for a long time but never really needed to until now. Trowel thanks for the offer and if this doesnt work I might take you up on the offer.
What stinks is this ia my only front attaching machine. My 125 only has attachments for the rear.

I'd say you should check not just flow, but pressure.  I had a gas engine that seemed starved for fuel.  Flowed pretty good, but when I checked pressure, it was not to spec.  I replace the fuel pump and all was good.

 

It does sound like a fuel delivery issue would account for all the symptoms you are describing.


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#7 skyrydr2 ONLINE  

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Posted February 15, 2014 - 12:36 PM

That was the issue !!! Got a brand new tractor now yah who!!!! Thanks for all the support guys.
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#8 KennyP ONLINE  

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Posted February 15, 2014 - 12:37 PM

Glad that fixed it!



#9 HowardsMF155 OFFLINE  

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Posted February 15, 2014 - 01:29 PM

That was the issue !!! Got a brand new tractor now yah who!!!! Thanks for all the support guys.

Sorry, but what exactly was the issue?  Air entering the system, or a pump that lacked either flow or pressue?



#10 Cvans OFFLINE  

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Posted February 15, 2014 - 02:23 PM

Glad you got it fixed :thumbs:  BUT dang dang dang. Thought I was going to get another cheap diesel  :wallbanging:

Seriously good to hear it is up and running again. 


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#11 skyrydr2 ONLINE  

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Posted February 15, 2014 - 03:21 PM

Sorry, but what exactly was the issue?  Air entering the system, or a pump that lacked either flow or pressue?


Lack of fuel volume and preasure, as it would run full throttle with out stalling. Also it would always start. If it was air it would stat and stall. Cost me $63 for the dang thing but it runs awsome now. And i can leave the return linw open now so it circulates warm fuel .
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#12 JDBrian OFFLINE  

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Posted February 16, 2014 - 02:45 PM

Great news Keith. You really need your front blade/blower this winter.



#13 skyrydr2 ONLINE  

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Posted February 16, 2014 - 08:07 PM

How did you folks fair out down east?( that's slang for Nova Scotia) for all the non- NewEnglanders out there.

#14 trowel OFFLINE  

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Posted February 17, 2014 - 07:01 AM

Sounds like you got it :thumbs: sweet.

Glad it worked out, now you get to see what a tough little engine the Kubotas are.



#15 skyrydr2 ONLINE  

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Posted February 19, 2014 - 08:17 AM

Well just a little update; no more fuel issues and the engine runs and sounds great--- BUT I am almost positive that the governor is not working correctly!! Someone was inside the pump and me thinks they didn'tget back together correctly. Going along it will puff black at randome and when you run up to a bank it will run it right down with out any smoke.... Thus leading me to believe its not correct.
Ill get into it some time this spring when i no longer need front attached implements.




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