Finding point of failure - diverter valve or FEL control valve

[ljplum12]

Straight off the pump.

 

[Leejohn]

Then there is only 3 things left. A real bad valve, relief stuck part way open, then the cyls as was said before. Now if the pump can only build 1500psi after the others are checked and the relief is set then you have a bad pump.

 

[ljplum12]

How do I properly set the relief?

 

[Leejohn]

I think you said you have been turning on it. If you don't know the turns you did, then I'm not sure.

 

[ljplum12]

Ok, I think I figured out what to do. I turned the adjustment on the pressure relief valve (on the FEL) in until the gauge read ~2000psi when I tried actuating the lift. The bucket seems to be working a lot better, but it's hard to say because the lift still won't go up.

 

[ljplum12]

One of the lift cylinder pistons may have come off of the rod.

How do I go about determining if this has happened?

 

[Xfaxman]

One of the lift cylinder pistons may have come off of the rod.
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How do I go about determining if this has happened?

Put the bucket on the floor or ground, remove the pin from the rod end of both lift cylinders. See if you can move the rod in or out by hand without the rod on the other cylinder moving the opposite direction.

Edit: After more thought, you may have to remove the hoses from the other end of the cylinder, so air can enter to allow the loose rod to move.

I have never had it happen to my loader, I am trying to remember what I have read about it in the Hydraulics Forum.

Hopefully someone with more experience will comment.

 

[erj]

ljPlum,
Before start tearing into it, let's check a few things:
What is the name and model on your FEL valve?
Is the gauge connected to the pressure line from the pump to the FEL valve?

You said that the bucket is working so now can do some testing:
Set tractor RPM at about 1200.
Now curl the bucket till it stops. When it can move no further (mechanically), the relief valve should open. This should be at 2000psi. If it is not, adjust relief valve so that it is (2000psi should be a safe setting for testing).
Now open the bucket till it stops. Relief valve should open at 2000psi.

Now press the lever to raise the FEL. Tell us specifically what happens and what the gauge shows.

 

[ljplum12]

ljPlum,
Before start tearing into it, let's check a few things:
What is the name and model on your FEL valve?
Is the gauge connected to the pressure line from the pump to the FEL valve?

You said that the bucket is working so now can do some testing:
Set tractor RPM at about 1200.
Now curl the bucket till it stops. When it can move no further (mechanically), the relief valve should open. This should be at 2000psi. If it is not, adjust relief valve so that it is (2000psi should be a safe setting for testing).
Now open the bucket till it stops. Relief valve should open at 2000psi.

Now press the lever to raise the FEL. Tell us specifically what happens and what the gauge shows.

Ok, the tach isn't working (gauge cluster is on my to-do list, so I guestimated). Opening the bucket until it stops puts it in the 1400-1500 psi range, it's around 1000 as the bucket is moving. Does this mean I need to tweak the pressure relief upwards?

 

[erj]

I will wait until you have responded to the 2 questions and perfomed the tasks:

What is the name and model on your FEL valve?
Is the gauge connected to the pressure line from the pump to the FEL valve?

You said that the bucket is working so now can do some testing:
Set tractor RPM at about 1200.
Now curl the bucket till it stops. When it can move no further (mechanically), the relief valve should open. This should be at 2000psi. If it is not, adjust relief valve so that it is (2000psi should be a safe setting for testing).