3-Point Hitch CK30HST - 3 Point hitch stuck in up position - not the seat valve speed adjustment

[ereilly]

My hitch has become frozen in the full up position. I know about the speed control knob below the seat. It makes no difference when I turn it.
The speed control knob stops at both the left or right after about four turns of almost no resistance between. Is this the normal behavior?
I can look underneath the metal body parts and barely see the shaft turning. It appears to make contact with whatever valve assembly is in there.

Is there any way to somehow bleed off the pressure?

I have a Farmi winch on the three point so it has significant weight. My wife and I have tried jumping up and down on it. No movement.

Help me out folks!
Thanks a lot for your ideas.

Ed

 

[wallace]

Ed
Were you able to raise and lower the winch prior to this happening?
Or did you just mount the winch and raise the 3 point and now it wont go down?

 

[wallace]

Couple of ideas here...
If you have a auxliary remote, make sure it is in the netural position.
I have also had the sway bars do this exact same thing. If you can rock the winch side to side and remove your sway bar pins, take both of them out and see if it will go down.
Make sure you have the lever in the up position before you try it.

 

[Coyote machine]

My hitch has become frozen in the full up position. I know about the speed control knob below the seat. It makes no difference when I turn it.
The speed control knob stops at both the left or right after about four turns of almost no resistance between. Is this the normal behavior?
I can look underneath the metal body parts and barely see the shaft turning. It appears to make contact with whatever valve assembly is in there.

Is there any way to somehow bleed off the pressure?

I have a Farmi winch on the three point so it has significant weight. My wife and I have tried jumping up and down on it. No movement.

Help me out folks!
Thanks a lot for your ideas.

Ed

Is there a lock-nut just behind the knob which you can tighten to allow the knob to fully turn the shaft going to the valve, from fully closed to fully open?
How did you get the winch to full up in the first place?
Do you have the PTO switch engaged when trying to lower the 3PH?

 

[ereilly]

The three point has worked fine recently. I did have a chipper on for a few weeks with it in the up position the last few days doing loader work. The chipper lowered fine when I went to change implements from the chipper to the winch. Winch was on the ground when mounting it. I did raise it almost all the way up, then tried to set it down. It would not go down. I tried up just a little more and it became stuck all the way up. I then tried the valve to increase the lowering speed.

I mounted the winch using the retractable arms. I then back up slowly to click the lower arms in place, then put the top link and sway bar pins in.
Is it possible that there is tension on the arms in some way that is causing resistance? When it gets light out (west coast) I will try removing the sway bar pins.

 

[ereilly]

OK

Stuck 3-pt is not the sway bars. They were loose.

I took off the seat to check on the mechanism. The shaft is operating properly. It is attached into a grey pump housing (I think it is a pump).

The shaft is attached to a brass threaded piece. I was able to turn it completely until it came out. It does not appear to be broken or stressed.

*Does this part some how relieve pressure? It does not appear that there is any internal connection to this threaded part.
Perhaps the pump seal is broken.

I called my local dealer and he had some ideas but did not seem to have direct experience with this failing.

I have added a photo - there is a plastic shroud over the entry point into the pump. I have it peeled back in the photo - the brass part I talked of goes in and can completely be removed


I don't have a trailer - dealer is 75 minutes away. I could remove the pump and keep things clean and take it in to him.

Ideas?

 

[kiotiken]

Do you happen to have a backhoe or did the machine ever have one? Apparently they used to plumb them in a way that when the valve was set to operate the backhoe, the 3pt wouldn't work. If there's something like that on your tractor and it was hit by accident...

 

[dfkrug]

I took off the seat to check on the mechanism. The shaft is operating
properly. It is attached into a grey pump housing (I think it is a pump).

That is the 3-pt position control valve, not a pump. Made by Mita Oleodynamica
of Italy.

Your symptoms seem to point to a problem with it, so you may need to remove
it. Consult your service manual for repairs.

Before removing it, clean that area up well. Photos are of one I removed on
a CT230 (same unit).

 

[ereilly]

Dave, thanks for the pix of the control valve. I have looked at this again and I believe part of the problem is the attachment of the shaft onto the control valve. There is a 'ring' that the brass screw threads into. In the blurry picture I posted, you can see a split in it. It has about 5 splits around the edges. I am not sure if this was crimped on in some way. Since I have been working on this, the speed control now can be tightened all the way in but when turning the other direction it completely comes loose and separates from the valve. I put the seat back on so I can't take a photo. My valve looks a little different then you photo.

Anyone understand how the shaft attaches and what actually turns in the valve to increase/decrease speed? Maybe the crimped part was a stop so you can not turn it too far out. I may have split it by turning too far with a wrench.

I guess the next step is to remove the valve. I do have service manual but it is of limited help on this part.

I don't care much about the speed control but I do need to raise and lower the three point. BTW, I have one lever for the three point not two as some models use.

Is there any pressure build up to be concerned about when removing the valve?

Is it possible that the valve just needs cleaning or is it likely a replacement?

Thanks again.

Ed

 

[Coyote machine]

FWIW the valve is a POSITION CONTROL Valve, it is not so much for speed as it is for helping to control the position of the 3 point assembly, arms, etc. Therefore if it is 'locked' closed the 3PH will not move in a downward direction, hence your current stuck 'up' state.
If I'm understanding what your stating: the valve's knob & shaft will allow you to turn the shaft all the way clockwise until it will go no further, correct?
When you try to OPEN the valve by turning it COUNTER- clockwise it will not turn at all?
If that is indeed the case your PCV is not working.
Please verify the above questions.