/ Kubota catastrophic engine failures #51  

farmerdaleh

New member
Joined
Nov 13, 2017
Messages
2
Location
lincoln ,delaware
Tractor
massey 471,283,1085
I know of 2 Kubota skis steers that have jumped time and knocked holes in the pistons now whether the fuel pump drive caused it cannot say 1 had 250 hour and one 700 Kubota refused warranty on both till lawyers were presented
 
   / Kubota catastrophic engine failures #52  

Hay Dude

Super Star Member
Joined
Aug 28, 2012
Messages
10,452
Location
The Corrupt Rust Belt
Tractor
Case-IH MX-270, Massey Ferguson 7495, Challenger MT535B, Kubota M126XTDC, Kubota F3680 & ZD331 Ram 5500 Cummins
Oh that's indeed a fun one. I guess Kubota thought it was a good idea to get rid of the strainer on the fill neck?

My only fuel storage is only a 8 Gal container that serves both my tractor and homemade backhoe. Being a somewhat low storage volume, I don't get fuel sitting too long and any trash on the fuel typically sits on the bottom since it has a ball valve about an inch or so from the bottom. Even if it did, the strainer on the tractor would've caught it. The smaller stuff gets caught by the filter.

On this tractor with the the fuel tank by the steps, makes it very easy to fuel. Just put it on the floor and open the ball valve. Of course that doing this way only works for comically small operations like mine. It's not pratical at all for some actual farming with lots of equipment.

View attachment 753591

Being Portuguese, have you ever visited Brazil?
I hear its amazing.
 
   / Kubota catastrophic engine failures #53  

ultrarunner

Super Star Member
Joined
Apr 6, 2004
Messages
19,912
Location
SF Bay Area-Ca Olympia WA Salzburg Austria
Tractor
Cat D3, Deere 110 TLB, Kubota BX23 and L3800 and RTV900 with restored 1948 Deere M, 1949 Farmall Cub, 1953 Ford Jubliee and 1957 Ford 740 Row Crop, Craftsman Mower, Deere 350C Dozer 50 assorted vehicles from 1905 to 2006
So when did the hyper sensitive fuel systems come into being?

Is is tied into a position tier?

In other words tier 3 no and tier 4 yes?
 
   / Kubota catastrophic engine failures #54  

ptsg

Elite Member
Joined
Apr 3, 2013
Messages
4,713
Location
Portugal
Tractor
Branson F36Rn
Being Portuguese, have you ever visited Brazil?
I hear its amazing.
It sure is. I have not though but given the last 5 years or so, I'm almost living in Brazil, since anywhere I look, there a Brazilian person there. My hometown is particularly worse in that regard.

My dad did spend a couple months there tuning, adjusting and teaching them on how to run the machines that would assemble the cassettes way back when cassette was a thing.
 
Last edited:
   / Kubota catastrophic engine failures #55  

Gregster613

Platinum Member
Joined
Apr 19, 2009
Messages
553
Location
Southern Ca. halfway up a mountain in rural Ramona
Tractor
273 TYM. 2009 //Yardmachines 7 Speed Shift-on-the-goScotts L2048
So when did the hyper sensitive fuel systems come into being?

Is is tied into a position tier?

In other words tier 3 no and tier 4 yes?
Good question ultrarunner, I'm interested in the actual answer also! I'm willing to bet that you already nailed the answer though!
 
   / Kubota catastrophic engine failures #56  

sd455dan

Elite Member
Joined
Oct 23, 2012
Messages
3,429
Location
North Idaho
Tractor
Rhino 554, Ford 550 TLB (JD X500, MTD, Gilson riding mowers) Ford 3000-Sold
I know of 2 Kubota skis steers that have jumped time and knocked holes in the pistons now whether the fuel pump drive caused it cannot say 1 had 250 hour and one 700 Kubota refused warranty on both till lawyers were presented
That sure sounds like the injection pump solid roller cam failure where the lifter turns in its bore and then destroys the timing gears which also allows piston to valve contact.
 
   / Kubota catastrophic engine failures #57  

MinnesotaEric

Elite Member
Joined
Feb 4, 2014
Messages
4,754
Location
Nevis, MN
Tractor
Kioti NX6010
Why don't YOU read your warranty, rather than accept the dealer's take? I believe the engine and drive line have a six year warranty.

Because the OP is out of his warranty period. But the OP is trying to collect data to see if his type of failure is a common failure or not.

Throttle back.
 
   / Kubota catastrophic engine failures #58  

eagle628

Bronze Member
Joined
Feb 14, 2014
Messages
69
Location
VT
Tractor
Deere/Case IH
Good question ultrarunner, I'm interested in the actual answer also! I'm willing to bet that you already nailed the answer though!
Not really, Tier 4 brought exhaust aftertreatment into the picture. Tier 3, and to some extent even earlier, represented what engineers could do within the cylinder, which is more relevant to the fuel discussion. If you want a rule of thumb, the better one is probably solenoid actuated common rail systems versus mechanically timed injection.
 
   / Kubota catastrophic engine failures #59  

ultrarunner

Super Star Member
Joined
Apr 6, 2004
Messages
19,912
Location
SF Bay Area-Ca Olympia WA Salzburg Austria
Tractor
Cat D3, Deere 110 TLB, Kubota BX23 and L3800 and RTV900 with restored 1948 Deere M, 1949 Farmall Cub, 1953 Ford Jubliee and 1957 Ford 740 Row Crop, Craftsman Mower, Deere 350C Dozer 50 assorted vehicles from 1905 to 2006
When was mechanical timed injection replaced?
 
   / Kubota catastrophic engine failures #60  

Reddogs

Platinum Member
Joined
Jan 14, 2022
Messages
501
Tractor
John Deere 790 / Kubota L3301
So when did the hyper sensitive fuel systems come into being?

Is is tied into a position tier?

In other words tier 3 no and tier 4 yes?
That would be my question, as the tier 4 revs up when doing the regen much higher than usual.
 
 
Top