agracat 2920 3pt hitch problem-hydraulic : Jinma Farmpro Agracat  -- Chinese Tractors Discussion Forum and Review agracat 2920 3pt hitch problem-hydraulic : Jinma Farmpro Agracat -- Chinese Tractors Discussion Forum

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Discussion Boards > Active Subjects > Messages as Posted > Jinma Farmpro Agracat Forum

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 03-25-2009, 14:27 Post: 161388
my82cam



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 agracat 2920 3pt hitch problem-hydraulic

i have an 05 2920 4wd agracat. i'm having a problem with the 3pt not lifting anything at all. when it is running it will drip fluid out of the vent tube but when it is shut off, after it sits, there is nothing on the dip stick. is there a valve that is stuck or filter that is plugged? i havent found a spin on type filter. the tractor sat for the last 6 months and i'm just now getting it going again. any advice would be awesome! thanks, brian. feel free to call 615 429 2196






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 03-25-2009, 15:15 Post: 161392
my82cam



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 agracat 2920 3pt hitch problem-hydraulic

a little side question...when i'm checking to fluids is it when the dipstick is screwed in all the way or just unscrew wipe it off than stick it in until the bottom of the threads touch the housing or what?






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 03-25-2009, 15:41 Post: 161395
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 agracat 2920 3pt hitch problem-hydraulic

On Asian equipment - when the dipstick is threaded - you don't screw it back in to check levels. Unthreaded, push it all the way back in to check.

If your dealer changed out the Chinese fluids for proper AW32 hydraulic fluid, it's as clear as water when clean. I can't see mine on the dipstick either. So I use a clean rag. Rag in one hand, remove dipstick with other. Lay dipstick flat on rag, the wet spot will indicate where the fluid level was on the dipstick

Fluid coming out the vent usually means
1. overfull sump
2. air in the system
3. you've just gone up a steep slope

The fact it doesn't lift could be many things;
1. insufficient fluid
2. air leak
3. divertor valve in the wrong position
4. defective lift valve
5. bad cylinder
6. bad pump
7. clogged suction filter
8. and the list goes on

//greg//






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 03-25-2009, 16:11 Post: 161399
my82cam



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 agracat 2920 3pt hitch problem-hydraulic

where would the suction filter be? i was really hoping that the problems were connected to each other. since i havent gone up any big hills i would have to say it might be air or over full. i think i mihgt drain and refill and see what happens. if the divertor valve is stuck is it rebuildable? or just replace? is that the valve by my right foot?






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 03-25-2009, 17:26 Post: 161405
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 agracat 2920 3pt hitch problem-hydraulic

the dipstick looks like it has been broker and than welded back onto the cap of the 3pt check-fill. the stick is about 2inches. do you know how long a normal one is? i have all 4 books but they don't seem to help that much. i think the chinese to english isnt the best translation.






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 03-25-2009, 20:11 Post: 161409
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 agracat 2920 3pt hitch problem-hydraulic

Suction filter is inside the sump. There's a steel line that goes into the sump from the top. I think it's held in place with a triangular piece and 3 bolts. The suction screen is below that. You may find that it's collapsed. That occurs either when it's irreversibly dirty, or has sucked too much water - or both. If it's not collapsed, you can soak it in diesel fuel. If you have an air compressor, blow dry it from the inside. If not, just let it drip dry. If it's collapsed, replace it.

Divertor valve - if yours is even equipped - is either a hex head fitting on the left side of the sump, or integrated with the flow control valve below the seat front. The lift control valve is on the right side, but not by your foot. I'm not sure what that would be.

2" is about right for the dipstick. Mine only has one line on it, I consider that the full mark. I don't top up the sump until the dipstick is dry.

I have four books too, hopefully similar. Can you point out in one of them what you're calling a valve by your right foot?

//greg//










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 03-26-2009, 08:40 Post: 161415
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 agracat 2920 3pt hitch problem-hydraulic

thanks for all the information. talking to you has been more helpful than reading the books for 2 hours! Laughing out loud according to the manuals it is just called a valve(behind the brake pedal on the right by my foot) but it has 2 lines that go over to the steering valve, the return line from the 3pt goes to the valve before it goes back to the hydraulic pump. i'm going to try to change the fluid and clean the sump screan. thanks for all the help!






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 03-26-2009, 09:22 Post: 161416
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 agracat 2920 3pt hitch problem-hydraulic

Ok, that's the priority valve. It has a different job than the diverter valve I mentioned earlier. Never saw one in the location you describe, usually it's underneath the right side of the fuel tank. Turning the steering wheel activates that valve to divert fluid to the steering controller. When you stop turning the steering wheel, full flow returns through the main loop (which in your case is the rear lift). One test of a dirty priority valve is if the rear lift only works when you play with the steering.

Not saying this is your problem, it's very seldom reported. But there's a remote chance that all the fluid is being looped through your steering - and none getting to the lift cylinder. The priority valve itself is pretty simple to remove for cleaning. But based upon your descriptions so far, that would be low on my own troubleshooting list.

As part of your fluid change, I would strongly recommend a kerosene flush. Diesel fuel will work too, but kero leaves less residuals. Drain as much hyraulic fluid as possible, clean the suction screen and replace. Fill sump (to the mark on the dipstick) with kerosene. Start the tractor and drive in figure 8 a few times. Raise and lower the rear lift at the same time. Shut down the tractor and drain the kero. Strain what comes out through a cheese cloth or screen. You can examine the big chunks as they come out, and make up your mind whether to run the kero through for another flush. When you're satisfied, clean or replace the suction filter again, refill with AW32 hydraulic fluid. Go through the figure 8 thing again, check the level, top off fluid if required.

//greg//






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 03-26-2009, 10:26 Post: 161418
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 agracat 2920 3pt hitch problem-hydraulic

that sounds like a good plan of attack on the tractor, thanks. how do i get all the kero out of the hydraulic system? if i just drain it, it wont get it all out, is it ok to leave some in there? do i take a line off and pump it out of the hyra system? i have been thinking about selling it when i get it all fixed. i don't have much need for it. i have a koyker 160 FEL a 5ft box blade and a 5ft bush hog. tractor has less than 75 hours on it and was $13K+ when it was new. tractor is in good shape, what would be a good asking price for everything together? 8500? more, less? i don't really know what it's worth.






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 03-26-2009, 13:12 Post: 161419
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 agracat 2920 3pt hitch problem-hydraulic

The reason I recommend kero is twofold; (1) the specific gravity is heavier than both diesel and hydraulic fluid, so it's right there when you remove the drain plug. And (2) it's more volatile than diesel, so what little is left under drain level will evaporate faster than would diesel.

So you drain and refill with AW32. Work the system to thoroughly mix the remaining kero with the AW32. Park the tractor overnight. The kero and AW32 will separate in the sump, with the kero at the bottom. I'm sure you can take it from there.

As far as resale value - in the current economy - it's a buyer's market. Don't be disappointed at offers less than $8500. I say this, because AgraCat obviously saw you coming. If there was nothing else involved except tractor/loader/bb/mower, that package used to go for under $10k

///greg//






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Discussion Boards > Active Subjects > Messages as Posted > Jinma Farmpro Agracat Forum

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