2610d 3 point hydraulic lift position control

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LZeppelin513
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2610d 3 point hydraulic lift position control

Postby LZeppelin513 » Mon Jan 23, 2017 9:06 pm

Does the 2610d 3 point lift have position control? The lift lever only has any action on the top 2 inches of travel and it behaves like a progressive on/off switch rather than a position control.

I tried playing with some of the controls that have something to do with how the lift operates but couldn't get position control working. The knob under the seat facing towards the front of the tractor is a hydraulic fluid shut off valve i believe, so i have that all the way open. There is a very small lever sticking out of the left side of the hydraulic valve assembly that controls the rate of the 3 point arm decent. It seems like rotating it all the way forward or all the way back stops the decent and straight up is full decent...

Anyway, does the 2610d have position control? If so, any guesses why mine isn't working?

Thanks!

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Re: 2610d 3 point hydraulic lift position control

Postby LZeppelin513 » Mon Jan 23, 2017 9:23 pm

Just as I posted this, Aaron posted this picture on different thread.

Image

This appears how mine is set up.

winston
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Re: 2610d 3 point hydraulic lift position control

Postby winston » Tue Jan 24, 2017 6:31 am

Yes, it has position control. Something wrong with linkage or control valve if you have none.

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Re: 2610d 3 point hydraulic lift position control

Postby LZeppelin513 » Tue Jan 24, 2017 1:08 pm

Ok, any guesses what to try to do first?

winston
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Re: 2610d 3 point hydraulic lift position control

Postby winston » Tue Jan 24, 2017 2:17 pm

I would look and see why the hydraulic valve is not being actuated when the lever is in a lower position. Thinking yours in very similar to the 2000, does it look like this? http://www.hoyetractor.com/CTGY/20003PTCONTROL.htm

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Re: 2610d 3 point hydraulic lift position control

Postby LZeppelin513 » Tue Jan 24, 2017 5:17 pm

It appears to be very similar but not exactly the same.

I circled a linkage that looks like it should perhaps be connected to something and is not.
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winston
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Re: 2610d 3 point hydraulic lift position control

Postby winston » Tue Jan 24, 2017 6:46 pm

The double nutted rod going back the the rockshaft is the feedback rod. When your lift reaches maximum height that stops it from trying to lift higher. Have you removed or looked under the little cover over the valve rod watching to see lever position when contacted?

I am not sure but I believe the connection not being used might be for a draft control that would be hooked up with a cable going back to a tiller. In other words, you don't need it hooked up.

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Re: 2610d 3 point hydraulic lift position control

Postby LZeppelin513 » Tue Jan 24, 2017 8:19 pm

When the 3 point lift handle is all the way down there is about 1/8" of space between the linkage arm and the hydraulic valve rod. When I move the handle about 1 inch up, the linkage arm contacts the valve rod. As i continue moving the handle up the linkage arm engages and moves the valve rod but the lift does not raise. At about 2/3 the way up the handle guide, the 3 point lift moves. Even if i stop moving the handle at the same moment the 3 point lift begins to move, it continues to lift about half way up. The remaining third of the handle travel seems to work more like (but still quirky) a position control.

If i pull on the spring moving the linkage arm into contact with the valve rod when with the lift handle all the way down, most of the handle travel will get action from the three point lift....but its still a bit quirky, difficult to explain.

At this point im thinking about shortening the spring to increase its tension on the linkage, but before I deform the spring, any other ideas?
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Re: 2610d 3 point hydraulic lift position control

Postby LZeppelin513 » Tue Jan 24, 2017 8:30 pm

Here is a pic labeling the parts with the words i was using. Hopefully it helps clarify what i was saying. I'm sure I wasn't using the official names of the components.
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winston
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Re: 2610d 3 point hydraulic lift position control

Postby winston » Wed Jan 25, 2017 5:10 am

Control valve possibly sticking? According to parts shown here the control valve is the same as the one shown for the 2000. I attached the parts drawing for it a few posts back. It shows a breakdown of the valve. Many people have taken these apart for inspection and cleaning and I don't believe much more than an o-ring can be replaced. With the tractor not running move the control valve handle back and forth noting the movement of the valve. Does it appear to move smoothly?

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Re: 2610d 3 point hydraulic lift position control

Postby LZeppelin513 » Wed Jan 25, 2017 12:50 pm

The control valve goes in and out smoothly.

I would guess that there is not supposed to be a gap between the valve rod and the linkage arm, but i don't know. Because that gap, the control valve handle can move about 1/4 or so of its travel before it engages the valve rod. I'm thinking that there may be something wrong with the linkage. I am going to try and take a video of how it operates and post it.

winston
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Re: 2610d 3 point hydraulic lift position control

Postby winston » Wed Jan 25, 2017 6:04 pm

The lift handle shaft has a cam built on it which is part of what actuates the lever that pushes the control valve. The feedback rod also has a round collar with a pin welded on it that pushes the control valve. Assuming both these are working smoothly with no binding?

It does sound as though your spring might be weak. Might be worth a new one. Not positive this is the correct one, just guessing. http://www.hoyetractor.com/PROD/194151-47440.htm

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Re: 2610d 3 point hydraulic lift position control

Postby LZeppelin513 » Wed Jan 25, 2017 6:38 pm

Do you know if the lever should be in contact with the valve even when the handle is all the way down, or if the gap when the handle is down is normal? A much stronger spring would likely take up the gap space, but i'm not sure what correctly working looks like.

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Re: 2610d 3 point hydraulic lift position control

Postby LZeppelin513 » Wed Jan 25, 2017 6:40 pm

winston wrote:The lift handle shaft has a cam built on it which is part of what actuates the lever that pushes the control valve. The feedback rod also has a round collar with a pin welded on it that pushes the control valve. Assuming both these are working smoothly with no binding?


Yes they work smoothly. I wasnt sure at first if something was loose inside the lever or if there was a cam inside. Thanks for that clarification.

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Re: 2610d 3 point hydraulic lift position control

Postby winston » Thu Jan 26, 2017 5:57 am

I can find nothing in any material I have stating the recommended gap between the lever and the control valve plunger but my opinion would be that it should be touching when the control valve handle is in the down position. Your testing indicates that gives quicker action on the lift when you start raising the lift handle.


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