B7100 lift unit not working

[newshb_k]

Hi everyone

I have split the tractor to change the reverse gear, and I changed the hydraulic oil, and cleaned the hydraulic filter.

After assembling the tractor, the three point hitch raised and didn’t lower. So I applied some weight on it to lower it, and suddenly it became loose and doesn’t lift any more. I have released air by loosening the control bolt (the one under the chair) but it didn’t fix the issue, and I can see oil pumping when moving the lever (I loosened the bolt in the Hyde line going into the hitch unit) but the arms never move up. I have some videos that might help in assisting the situation

Kubota b7100 3 points hitch not working

youtube.com

Kubota lift not working pt2

youtube.com

B7100 lift not work pt3

youtube.com

 

[North Idaho Wolfman]

You don't have any hydraulic flow.
When you loosened the banjo bolt on the side of the valve, it should just be dumping fluid out at a huge rate.

FYI: You can easily pick up on the lift arms like that even if they are working properly, it's a floating setup.

 

[newshb_k]

You don't have any hydraulic flow.
When you loosened the banjo bolt on the side of the valve, it should just be dumping fluid out at a huge rate.

FYI: You can easily pick up on the lift arms like that even if they are working properly, it's a floating setup.

Thx for the reply

what could be the cause of not having the flow, the pump? I have changed the oil and assured the level is ok….

 

[North Idaho Wolfman]

Check the hose section of this pipe and make sure it's tight.
And when you installed the filter screen did you use new O-rings.

 

[newshb_k]

Check the hose section of this pipe and make sure it's tight.
And when you installed the filter screen did you use new O-rings. View attachment 154634

I will check that part

no, I didn’t change the o-rings on the filter….but one thing to mention is that after I assembled the tractor again, the hitch worked fine but was stuck at the top…once I applied wait it dropped and never raised again

 

[newshb_k]

I

Check the hose section of this pipe and make sure it's tight.
And when you installed the filter screen did you use new O-rings. View attachment 154634

I have checked and it is tight,,,I suspected it could be the piston, and when I opened the cover I didn’t see the piston, is this normal

 

[newshb_k]

I have removed the 3 points hitch and found the piston in the oil

seems I assembled it incorrectly

now issue is fixed

Thx everyone