L3350DT hydraulic problems

[Troy sisk]

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]

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]

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]

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]

Yes, I changed the filters It to be full of fluid, and used MFA’s best hydraulic fluid

 

[TheOldHokie]

Yes, I changed the filters It to be full of fluid, and used MFA’s best hydraulic fluid

What you have done is thrown a lot of parts at it with no diagnosis. Does the loader work?

Dsn

 

[Troy sisk]

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.

 

[TheOldHokie]

Buy a pressure gauge and test hydraulic pressure at the loader.

Dan

 

[Troy sisk]

See

Buy a pressure gauge and test hydraulic pressure at the loader.

Dan

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.

 

[TheOldHokie]

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]

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

 

[TheOldHokie]

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

Hydraulic shuttle shift I believe. It msy be as simple as a dirty strainer. He needs to do a little structured testing to narrow things down.

Dan

 

[whitetiger]

Does this tractor have a in-line screen?

No, your tractor has no screen or strainer, just the spin-on filter.
Is the Forward & Reverse shuttle on the LH fender or on the dash, left of the steering wheel?

 

[North Idaho Wolfman]

Hydraulic shuttle shift I believe. It msy be as simple as a dirty strainer. He needs to do a little structured testing to narrow things down.

Dan

AWWWW my confusion was my own doing, I read B3350, way different beast.

 

[TheOldHokie]

AWWWW my confusion was my own doing, I read B3350, way different beast.

BTDT.

Dan

 

[Troy sisk]

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

It has a manual shuttle ship transmission that has to have hydraulic or plumbing through it to the best I know. I really wish I had somebody to tell me whether or not that had an screen in the hydraulics somewhere that would be the answer I would Ann

 

[Troy sisk]

No, your tractor has no screen or strainer, just the spin-on filter.
Is the Forward & Reverse shuttle on the LH fender or on the dash, left of the steering wheel?

It is on the left left-hand fender

 

[Troy sisk]

It is on the left left-hand fender

I apologize it is on the left of the steering wheel.

 

[North Idaho Wolfman]

I apologize it is on the left of the steering wheel.

First: I would start with confirming that the linkage is working the valve properly.
Usually when something falls on it's face instantly there is a reason, like a linkage that has come out of adjustment or broken in some fashion.

 

[North Idaho Wolfman]

It has a manual shuttle ship transmission that has to have hydraulic or plumbing through it to the best I know. I really wish I had somebody to tell me whether or not that had an screen in the hydraulics somewhere that would be the answer I would Ann

@whitetiger already gave you the answer:
There is no screen in that system

No, your tractor has no screen or strainer, just the spin-on filter.
Is the Forward & Reverse shuttle on the LH fender or on the dash, left of the steering wheel?