Hydraulic Help Needed

[Farmer62]

I have an L 2250 and just put in a brand new clutch. After reassembly, I decided it was a good time to change all my fluids. Two things happen. 1. I installed the wrong hydraulic fluid. 2. After installation of the wrong fluid, my tractor has power steering, but nothing for the three-point hitch or bucket.
I have read online that I need to drain the wrong fluid, install the correct fluid and run the tractor for 10 minutes and then repeat. I also read online that I should check the sump screen. I would do that if I knew where to locate it. I can’t imagine that the incorrect fluid is what is causing my three-point hitch not to raise in lower. Just an FYI the three-point hitch worked fine before I drained all the fluids.
For some reason online, I cannot figure out where the screen on the sump is. If somebody could help me out with this, I would greatly appreciate it. I am also wondering if the system is air bound as we pretty much drained fluid from everything. If this is the case, does anybody know how I get rid of all the air?

 

[Russell King]

As far as I see from the illustrated parts list there is no screen only a screw on filter.
See the illustrated parts lists at this site.

Kubota Tractor Corporation - Illustrated Parts List

- K-PAD - Parts Lists - Illustrated Parts Lists - diagrams

apps.kubotausa.com

Older tractors did use a filter screen but no other filter. There may have been a few years with both a screen and a filter.

You do not need to worry about air in the system, it will eject any air out by using it. Just move all cylinders in and out a few times to get rid of any air.

I have to guess that since you split the tractor you removed the FEL and disconnected all the hoses between the tractor and the FEL. That makes me think that the hoses are not connected properly now. The fact that you have power steering means the pump is working (unless your tractor has separate (stacked) pumps). The usual suspects are that the power beyond hose and the tank return hose are reversed. If you don’t know how to hook them up to verify they are connected correctly, you need to mark the hoses as A, B, C hoses (both ends of one hose with A…) and take pictures at the FEL valve and also at the connection to the tractor block.

If there is some type of selection valve on the connector block, you need to be sure it turned to the correct position. (I don’t think you have that type of selection valve but am not 100% sure).

What fluid did you put in it?

 

[North Idaho Wolfman]

This is all the same info as @Russell King said:

You have a line to the FEL either not connected or not connected properly.

You would have to have put some really wrong fluid in it to do any damage.

There is no filtter screen on that model.

 

[Farmer62]

As far as I see from the illustrated parts list there is no screen only a screw on filter.
See the illustrated parts lists at this site.

Kubota Tractor Corporation - Illustrated Parts List

- K-PAD - Parts Lists - Illustrated Parts Lists - diagrams

apps.kubotausa.com

Older tractors did use a filter screen but no other filter. There may have been a few years with both a screen and a filter.

You do not need to worry about air in the system, it will eject any air out by using it. Just move all cylinders in and out a few times to get rid of any air.

I have to guess that since you split the tractor you removed the FEL and disconnected all the hoses between the tractor and the FEL. That makes me think that the hoses are not connected properly now. The fact that you have power steering means the pump is working (unless your tractor has separate (stacked) pumps). The usual suspects are that the power beyond hose and the tank return hose are reversed. If you don’t know how to hook them up to verify they are connected correctly, you need to mark the hoses as A, B, C hoses (both ends of one hose with A…) and take pictures at the FEL valve and also at the connection to the tractor block.

If there is some type of selection valve on the connector block, you need to be sure it turned to the correct position. (I don’t think you have that type of selection valve but am not 100% sure).

What fluid did you put in it?

I put in Travelers Premium 32, and was supposed to put in travelers Universal. Only two small steel hoses going to the back of the tractor that are bent and away, but they can only hook to the pump one way and there is one bigger hose. The FEL lines are done in such a way that you can’t mix them up. My power steering is runoff a different part of the pump.

 

[Russell King]

Okay. On the fluid that was just a hydraulic type fluid and would not harm the hydraulic system and (probably) not hurt the tractor in short term use. I would get the proper fluid in is sooner than later though. I personally would not worry about changing it twice, just let it drain well and put the correct fluid in and call that good. It won’t hurt anything to change it twice if you don’t mind the extra expense.

Okay then you will need to do some diagnostics to see what is going on. Start by removing the hose out of the tractor into the P port of the FEL valve. Remove it from the valve end only not at the tractor end. Then put it into the transmission fill port if it can reach or into a five gallon bucket. Crank the tractor to see if oil is ejected through the hose. If the tractor starts that is okay but don’t let it run very long or it will pump the sump empty and damage the pumps.

If no fluid is pumped that is a problem to resolve. I would recommend you then make sure fluid is getting to the pump inlet. Or verify that the hose is actually connected to the correct port at the tractor end.

If the pump is moving fluid then hook the FEL hose back to the P port and get a 3000 psi gauge, fittings and a disconnect half to match a valve outlet to the FEL cylinder. Connect the gauge to the outlet and start the tractor and idle it. Activate the valve to feed the port you are connected to and see if you see some pressure, then rev engine to full rpm and see if the pressure increases (hold the FEL lever to the same position).

If you get pressure increases the range of 2000 psi then everything should be working.

 

[TheOldHokie]

I put in Travelers Premium 32, and was supposed to put in travelers Universal. Only two small steel hoses going to the back of the tractor that are bent and away, but they can only hook to the pump one way and there is one bigger hose. The FEL lines are done in such a way that you can’t mix them up. My power steering is runoff a different part of the pump.

Does the FEL work?

Dan

 

[North Idaho Wolfman]

I put in Travelers Premium 32, and was supposed to put in travelers Universal. Only two small steel hoses going to the back of the tractor that are bent and away, but they can only hook to the pump one way and there is one bigger hose. The FEL lines are done in such a way that you can’t mix them up. My power steering is runoff a different part of the pump.

Sounds like you have simply cavitated the pump.
All you need to do is fill the tractor with the proper fluid, no need to flush out what was left in there, it's not going to hurt anything on that model of tractor.
Then run the tractor at an idle then cycle the three point control and FEL control till either works.

 

[Farmer62]

Thank you for all the help. I ended up taking the hydraulic block off and cleaning it. When the tractor was split, a small amount of dirt must’ve gotten him somehow. Clean the pump added new fluid and it works like a charm.