L3350DT hydraulic problems

Troy sisk

New member

Equipment
L3350DT Kubota tractor
Jan 31, 2026
6
0
1
58
southeast mo
My l3350 tractor was working fine and then just quite pulling, i bought a pump on line and changed it out. I bleed the air out and replaced all of the o rings .But now it will move and then hesitate and then move again ,but wont work properly .I could seriously use some help.
 

PoTreeBoy

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L35 Ford 3930
Mar 24, 2020
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WestTn/NoMs
My l3350 tractor was working fine and then just quite pulling, i bought a pump on line and changed it out. I bleed the air out and replaced all of the o rings .But now it will move and then hesitate and then move again ,but wont work properly .I could seriously use some help.
Please clarify. What 'quit pulling', the loader, 3ph, PTO, or travel?

I was about to say the DT is a gear drive, but I see it was available with manual or hydraulic shuttle. Which is yours?

Have you changed the hydraulic filter, is it full, and what fluid did you use?
 

Troy sisk

New member

Equipment
L3350DT Kubota tractor
Jan 31, 2026
6
0
1
58
southeast mo
Please clarify. What 'quit pulling', the loader, 3ph, PTO, or travel?

I was about to say the DT is a gear drive, but I see it was available with manual or hydraulic shuttle. Which is yours?

Have you changed the hydraulic filter, is it full, and what fluid did you use?
Sorry, I did not get back to you sooner, yes I changed the fluid. I changed the hydraulic filter put all new O-rings in new hoses and bought a pump off-line still doing the same same thing just got finished replacing the hydraulic relief valve. No change. it will only go a few feet and then stop altogether. I could as I’ve exhausted my resources.
 

Troy sisk

New member

Equipment
L3350DT Kubota tractor
Jan 31, 2026
6
0
1
58
southeast mo
Sorry, I did not get back to you sooner, yes I changed the fluid. I changed the hydraulic filter put all new O-rings in new hoses and bought a pump off-line still doing the same same thing just got finished replacing the hydraulic relief valve. No change. it will only go a few feet and then stop altogether. I could as I’ve exhausted my mechanical resoures the bucket will not raise, and it will not travel very far without stopping
 

Troy sisk

New member

Equipment
L3350DT Kubota tractor
Jan 31, 2026
6
0
1
58
southeast mo
What you have done is thrown a lot of parts at it with no diagnosis. Does the loader work?

Dsn
No, the loader does not as it should. This morning I put the old pump back on it and it does exactly the same thing as the new pump but I got it to go for 500 feet and then hesitate for a moment and go some more I am believing that the problem is not the pump. Does this tractor have a in-line screen? I have looked in all the lines and in the belly of the tractor, but have not found one. I do not know if someone else has took it out.
 
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TheOldHokie

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Apr 6, 2021
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Myersville, MD
windyridgefarm.us
See

Yes, I think that’s my next move, it acts like it’s cavitating like there is something that is restricting the fluid and then it gets some for a little while and then restricts again.
You can easily observe the flow - no guessing involved.. All it takes is a length of 3/4" clear tubing from your local box store. Or cut up an old garden hose.

Dan
 

North Idaho Wolfman

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I'm really not understanding why you think the hydraulics have anything to do with the tractor movement.