Ym2000 loader working but three point won’t raise

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Bkfym2000
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Ym2000 loader working but three point won’t raise

Postby Bkfym2000 » Sat Feb 15, 2020 10:47 am

I have a ym2000. The loader works but the three point system will not raise. I figure the pump is not the issue since the loader is working and I have already checked and made sure the valve under the seat is backed all the way out and still nothing on the three point. Is there another diverted vale that I’m not aware of ?

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Re: Ym2000 loader working but three point won’t raise

Postby Aaron » Sat Feb 15, 2020 4:09 pm

Did you get it this way or did it just start doing this?

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Re: Ym2000 loader working but three point won’t raise

Postby Bkfym2000 » Sat Feb 15, 2020 7:38 pm

I got it this way. I loosened the the hose that Goes from the joystick control valve to the three point system and there is fluid coming out of it but it doesn’t seem like it’s coming out as quickly as maybe it should? Also I noticed that the hoses on the control valve/joystick are super hot even when I’m not using the loader. The loader works but it moves super slow. I also loosened the attachment point of the hydraulic hose from the joystickTo the top of the valve for the three point and there is fluid coming out of that as well.

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Re: Ym2000 loader working but three point won’t raise

Postby winston » Sun Feb 16, 2020 6:13 am

Is your loader plumbed with 6 hoses? That would be plumbed without power beyond which seems to be most common. 7 hoses would be plumbed with power beyond. The valve should not be hot. Are there markings on the openings on the valve? Not the loader cylinder valves, just the inlet, outlet and power beyond? Pictures possible?

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Re: Ym2000 loader working but three point won’t raise

Postby Bkfym2000 » Sun Feb 16, 2020 12:55 pm

So it has six lines coming out of the loader control valve body. I attached a diagram and some photos of how it is currently set up. Last night I took apart the three point control valve, very thing was moving and nothing stuck, no internal rust. I also to the three point cylinder partially apart and the piston moved back and forth, however I ddI not pull the piston out (was unable to push behind it to get it out of the cylinder). I the fluid I drained was a little milky but only slightly. Also I went to check the hydro screen. When I took the triangular cover off I found that the whole filter assembly is missing. So basically it’s just the cover and nothing else.
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Bkfym2000
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Re: Ym2000 loader working but three point won’t raise

Postby Bkfym2000 » Sun Feb 16, 2020 12:57 pm

Additional photos
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winston
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Re: Ym2000 loader working but three point won’t raise

Postby winston » Sun Feb 16, 2020 1:15 pm

Your last picture you are saying top hose from loader goes to this, does the hose go to this or does it go through the steel line we can see in the picture?

Is there a name and or a model number on your valve? I feel confident your cylinder hoses are ok but still have to wonder about the inlet/outlet/power beyond.

This is what you should have behind your triangle cover. https://www.hoyetractor.com/PROD/HS-4150.htm

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Re: Ym2000 loader working but three point won’t raise

Postby Bkfym2000 » Sun Feb 16, 2020 1:36 pm

the top hose on the valve attached to the steel line via an elbow connector circled in the picture. I don’t see any identifying marks on the valve, but it looks original. Missing the filter wouldn’t cause this issue correct?
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winston
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Re: Ym2000 loader working but three point won’t raise

Postby winston » Sun Feb 16, 2020 2:33 pm

I have never heard of anyone running without the strainer. Just looking at the strainer it would appear there is an area right inside the transmission housing that is sealed off with an o-ring on the strainer housing. I doubt it possible but would wonder if enough sludge could get in that area to cause fluid blockage? From your fluid description it would not sound like that is your problem.

I am still confused about the top loader hose. Maybe I am misreading but thinking you initially said it went to the 3 point valve and last post have circled the high pressure line coming from pump.

There should be some kind of marking on the valve like inlet, outlet, tank, pb, or just something. I would also think you should have one more opening that probably has a plug in it.

who manufactured the loader? Does it have a tag or name?

You could temporarily do this: 1. Follow the high pressure steel line coming from pump and going to loader valve. Take in loose at loader valve. 2. Unscrew and remove the fitting where the high pressure line was cut and is headed back to the 3 point valve. 3. Attach the hose you took loose at the loader valve to the high pressure line going back to the 3 point. Your plumbing will then be back to how it was original without a loader. If your 3 point works then you will know something is not right with the loader valve. Hope this makes sense.

Do this with engine off. You will loos a little fluid, you would be able to keep loader raised, just don't use loader controls once you loosen hoses, that is if you want to move tractor.

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Re: Ym2000 loader working but three point won’t raise

Postby Bkfym2000 » Sun Feb 16, 2020 6:22 pm

Thanks Winston that makes since you by pass the loader and just verify the three point works. The loader is a bulldog 285. Also this is the route that top loader loader hose. I traced the line and labeled it for you. Someone else also mentioned the relief valve could be opened too far and there’s not enough pressure in the system.
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winston
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Re: Ym2000 loader working but three point won’t raise

Postby winston » Sun Feb 16, 2020 7:05 pm

Yes, or possible trash in the relief valve. I would just try by passing the loader, see what happens, then go from there.

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Re: Ym2000 loader working but three point won’t raise

Postby Threeweight » Wed Feb 19, 2020 6:32 pm

If I am understanding your problem (loader works fine but 3 point won't raise)...

Can you lift the 3 point arms with your hands, or is it fully stuck/frozen?

When I got my YM1500, the 3 point was stuck up and would not go down at all. When I tore into it I found that at some point in it's life the rear axle seals had been compromised and allowed water to get into the tranny/hydraulic fluid, which then caused rust and corrosion, which ultimately froze piston that operates the 3 point. Previous owner had left the tractor parked for 2 years w/ the arms raised.

My filter screen was still there, but torn and covered in a mess of goo/rust flakes. I tore my rear end all the way down to clean up the insides, replace seals, and get the 3 point piston moving again. It was a mess inside, and a lot of work first w/ carb cleaner and rags, then draining and refilling it over and over to flush as much crud out as possible. If you run the fluid through a funnel w/ a screen you can re-use it in the flushing process.

My fluid also just looked "a little" milky on the dipstick... my guess is because the water that had been sitting in there for years had mostly already formed a sludge in the bottom of the transmission.

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Re: Ym2000 loader working but three point won’t raise

Postby Bkfym2000 » Thu Feb 20, 2020 1:01 am

The arms raise freely by hand. They are in the down position.

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Re: Ym2000 loader working but three point won’t raise

Postby Aaron » Thu Feb 20, 2020 8:40 am

Raising the arms by hand does not move the internal lift piston.

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Re: Ym2000 loader working but three point won’t raise

Postby Bkfym2000 » Tue Feb 25, 2020 9:15 pm

Ok guys, sorry to keep asking questions but I put a pressure gauge on the hydraulic system and found that the system is only pushing 1000 psi. Is this indicative of the pump failing or is there something else I can do to dial up the pressure ?


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