vwbeetle
New member
The UFO cylinder "leaks" down when I have the lift arms up and an implement attached. Any ideas on why and how to fix? Thanks.
Beetle
Beetle
UFO Problems
- Thread starter vwbeetle
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MJPetersen
Veteran Member
VW,
You need to update your information -- in your profile you state that you have no tractor, but in some of your posts you mention that you bought a YM 2002.
Some more info would be helpful. I am not absolutely positive what you mean by UFO, but if that is referring to the 3 point lift then on Yanmars, I believe, there are 2 valves under the seat that control how the 3 point behaves. One controls how fast it drops when placed in the down position and the other closes off the circuit so that the arms will stay up like for transport or when using the FEL or other such reason.
You can use these valves to trouble shoot exactly what the problem is. If the second valve is closed then the problem is in the lift cylinder itself and can only be rectified by rebuilding the lift cylinder with new seals. If with the second valve closed it does not leak down then the problem is in the valve body and that may be a seal problem or it may be a wear problem.
Now it could be that I do not know what I am talking about with your model. If I am talking about the right thing then good if not then just ignore this post and go about your business.
Mike
You need to update your information -- in your profile you state that you have no tractor, but in some of your posts you mention that you bought a YM 2002.
Some more info would be helpful. I am not absolutely positive what you mean by UFO, but if that is referring to the 3 point lift then on Yanmars, I believe, there are 2 valves under the seat that control how the 3 point behaves. One controls how fast it drops when placed in the down position and the other closes off the circuit so that the arms will stay up like for transport or when using the FEL or other such reason.
You can use these valves to trouble shoot exactly what the problem is. If the second valve is closed then the problem is in the lift cylinder itself and can only be rectified by rebuilding the lift cylinder with new seals. If with the second valve closed it does not leak down then the problem is in the valve body and that may be a seal problem or it may be a wear problem.
Now it could be that I do not know what I am talking about with your model. If I am talking about the right thing then good if not then just ignore this post and go about your business.
Mike
mark777
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I have to agree with Mike...
You might also check, when your draft control lever is in neutral, that the attached linkage is not making contact with the small detente ball on the valve.
The UFO is usually electric/mechanical control and linkages that operate an attached implement (most often a rototiller).
Mark
You might also check, when your draft control lever is in neutral, that the attached linkage is not making contact with the small detente ball on the valve.
The UFO is usually electric/mechanical control and linkages that operate an attached implement (most often a rototiller).
Mark
YanmarFever
Elite Member
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Beetle,
If your cylinder has gone bad, we have 2 or 3 used ufo cylinders on the shelf.
I would check the hoses for pin holes & tighten your fittings on the cylinder.
Also change the hyd. fluid & clean your screen filter (if needed)
Ernie
If your cylinder has gone bad, we have 2 or 3 used ufo cylinders on the shelf.
I would check the hoses for pin holes & tighten your fittings on the cylinder.
Also change the hyd. fluid & clean your screen filter (if needed)
Ernie
Mickey_Fx
Veteran Member
For those that do not know what the UFO is, it is a control system to help automate the adjmt of the 3 pt lift and specifically to raise, lower and adj the tilt of the 3 pt. It's purpose is to control the depth of the tiller used in the rice paddies. The newer systems can be adj and then used during at the end of a row to raise and lower the tiller. Press a buttom and the tiller raises and push another button and it lowers to the preset position. Ernie could tell you more than I know about the later designs and all the things they can be used for.
This thread has to do with the hyd cyl on the right lift arm which controls the tilt. This cyl replaces the normal manual operated right arm normally found on most tractors. The tilt can be adj't from the drivers seat via the controls mounted on the right fender.
Taking a look this AM, I don't see where this cyl can be rebuilt which it too bad. If that is the case, you need to find a used one like Ernie has mentioned. Ernie, you holding one for me?
This thread has to do with the hyd cyl on the right lift arm which controls the tilt. This cyl replaces the normal manual operated right arm normally found on most tractors. The tilt can be adj't from the drivers seat via the controls mounted on the right fender.
Taking a look this AM, I don't see where this cyl can be rebuilt which it too bad. If that is the case, you need to find a used one like Ernie has mentioned. Ernie, you holding one for me?
Attachments
MJPetersen
Veteran Member
OK now I am informed. And understand better what is happening. Glad someone who knows what they are talking about came into the picture.
Mike
And understand better what is happening. Glad someone who knows what they are talking about came into the picture.Mike
blackd
Platinum Member
VWBeetle, mine leaks down also, but I replaced the electric controls with a hydraulic controller several years ago. It is a nuisance when I bush hog, but mostly i just periodically readjust. i was thinking of buying a replacement cylinder from Northern or some other supplier. One of these days maybe, when it becomes a big enough pain in the ...
YanmarFever
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Mickey_Fx said:For those that do not know what the UFO is, it is a control system to help automate the adjmt of the 3 pt lift and specifically to raise, lower and adj the tilt of the 3 pt. It's purpose is to control the depth of the tiller used in the rice paddies. The newer systems can be adj and then used during at the end of a row to raise and lower the tiller. Press a buttom and the tiller raises and push another button and it lowers to the preset position. Ernie could tell you more than I know about the later designs and all the things they can be used for.
This thread has to do with the hyd cyl on the right lift arm which controls the tilt. This cyl replaces the normal manual operated right arm normally found on most tractors. The tilt can be adj't from the drivers seat via the controls mounted on the right fender.
Taking a look this AM, I don't see where this cyl can be rebuilt which it too bad. If that is the case, you need to find a used one like Ernie has mentioned. Ernie, you holding one for me?
Mickey
I have one with your name on it,
But what makes you think that yours will fail,
none of mine ever have, and I use them all the time.
Ern.
Mickey_Fx
Veteran Member
Don't have any expectations of failures but one never knows.
Nice knowing there are a few dealers out there that have knowledge and parts for some of these newer models, F series.
It is a pleasure to be able to adj the 3pt tilt on the fly with a simple movement of a lever close by. Think I'm getting spoiled.
Little disapointed to see the pics I posted have been cropped a little as what I posted showed more of the cyl being discussed. Along with the cyl there is a switch assy that tells the control when the link has the 3pt level.
Nice knowing there are a few dealers out there that have knowledge and parts for some of these newer models, F series.
It is a pleasure to be able to adj the 3pt tilt on the fly with a simple movement of a lever close by. Think I'm getting spoiled.
Little disapointed to see the pics I posted have been cropped a little as what I posted showed more of the cyl being discussed. Along with the cyl there is a switch assy that tells the control when the link has the 3pt level.
I could only find one knob under the seat. By turning it I was able to change the rate at which the lift arms would drop. With the valve all the way off, the UFO cylinder still leaked down. I have fabricated a replacement and secured the hydraulic cylinder off to the side until I can remove it and get it repaired or replaced. Mickey, I am curious what would prevent this cylinder from being rebuilt?
When I disconnect the cylinder, what should I do to the hydraulic lines? Do I cap them off?
Wade
When I disconnect the cylinder, what should I do to the hydraulic lines? Do I cap them off?
Wade
Mickey_Fx
Veteran Member
Looks like I was all wet in saying these cyl were not rebuildable. Went outside and looked again and while all the top end of the cyl is welded together on closer inspection I noted on the lower end it looks like the end is screwed into the cyl and needs a spaner to lock into end cap and unscrew.
Now feeling better about my own unit if it ever started to leak.
Now feeling better about my own unit if it ever started to leak.
Sorry it has been awhile since I visited this thread. I completely removed the UFO unit and disconnected the electrical connections for the joy-stick controller. I was hoping to cure a problem I'm having with my 3ph but it didn't help. My 3ph, when carrying a load like rotary cutter, will not stay up. It will gradually fall down about three inches and then "jump" back up. When the engine is off the 3ph will gradually fall all the way down. The 3ph will stay up when I shut off the valve under the seat (mine only has one valve which controls the rate of fall when the 3ph control lever is pushed down to lower the hitch) even when the engine is shut off. I was hoping that the problem was caused by a leaking seal in the UFO cylinder, allowing fluid to circulate around the 3ph lift cylinder somehow. This, however, was not the culprit. Does this mean the problem is in the 3ph lift cylinder seals/o-rings, or in the shut-off valve , or maybe in the controller valve. I don't know much about tractors but these are the only things left that I can think of. Are there any other possibilities. Thanks
Wade
Wade
MJPetersen
Veteran Member
It is in the 3pt cylinder or the valve, but probably the cylinder.
mike
mike
MJPetersen
Veteran Member
That is as I understand it. But I have never done it. Maybe someone who has will chime in. I do not believe that there is much that you can do with the valve. Maybe a few orings and such but for the most part there is not much "rebuildable." The cylinder should cure it for you.
Mike
Mike
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