J.J. I installed the valve on my M.F.1246 loader. When you push the valve handle forward, the loader starts down,but if you push it to far,the loader goes up real fast. Pull back on the handle and the loader goes up. Push the handle to the right and the bucket curls up. Push the handle to the left and the bucket curls down,if you push it all the way to the left,it locks and the bucket floats. any help with this prtoblem I would be thankful.Eddie
Nimco part numbers
- Thread starter jhwentworth
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J_J
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The hoses are installed wrong. You need to switch the hoses so that when you pull back, the lift raises, and when you push the lever fwd or down, the lift goes down.
The curl circuit has regen, and that is when you go to the right most position. There is a detent/bump that tells you are at regen. With curl, you push the lever right to dump/curl down, and if you go past the detent, you are in regen, and the bucket will dump fast.
In curl, you will have full power until you use regen, then you gain speed, but lose power.
If you wanted to raise the front tires off the ground, you would place the bucket on the ground, and push the curl lever right, and the front end should raise. If yu go to regen, you might not be able to raise the tractor.
Push the lever to the left, and the bucket curls up.
https://www.surpluscenter.com/Instruct/I9-7401.pdf
Ob serve the A1, A2, and B1, B2
The curl circuit has regen, and that is when you go to the right most position. There is a detent/bump that tells you are at regen. With curl, you push the lever right to dump/curl down, and if you go past the detent, you are in regen, and the bucket will dump fast.
In curl, you will have full power until you use regen, then you gain speed, but lose power.
If you wanted to raise the front tires off the ground, you would place the bucket on the ground, and push the curl lever right, and the front end should raise. If yu go to regen, you might not be able to raise the tractor.
Push the lever to the left, and the bucket curls up.
https://www.surpluscenter.com/Instruct/I9-7401.pdf
Ob serve the A1, A2, and B1, B2
J_J
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I am assuming that you are talking about this valve.
Surplus Center - 2 SPOOL COMPACT 10 GPM JOYSTICK CONTROL VALVE
The relief on this valve is set at 2000 psi, so if you know your tractor pump pressure, then using a 3000 hyd gage, you can set it to 50 to 100 psi below pump pressure.
Surplus Center - 2 SPOOL COMPACT 10 GPM JOYSTICK CONTROL VALVE
The relief on this valve is set at 2000 psi, so if you know your tractor pump pressure, then using a 3000 hyd gage, you can set it to 50 to 100 psi below pump pressure.
J_J
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Just making sure. Move those hoses to the correct position, and reset the pressure. .
J_J
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wpettit,
Did you get everything working correctly?
Did you get everything working correctly?
JJ, I am sorry I haven't responed to you, but I haven't been on the net. I
haven't got the valve on my tractor fixed yet. I think I am going to take it
to a M.F. dealer as I'm not sure which hoses go where. Again, thanks for all
your help on this matter. EDDIE
haven't got the valve on my tractor fixed yet. I think I am going to take it
to a M.F. dealer as I'm not sure which hoses go where. Again, thanks for all
your help on this matter. EDDIE
J_J
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Save yourself some money, and connect it like in the diagram.
http://www.surpluscenter.com/Instruct/I9-7401.pdf
Fig 2
http://www.surpluscenter.com/Instruct/I9-7401.pdf
Fig 2
Mine is connected like that and it does the same exact thing. You can feel the detent for the bucket curl, but if you push it too fast for lowering the the whole loader, it flies up in the opposite direction and shakes the whole tractor. I have been dealing with it by being very careful while lowering. But it is a pain. I could post a video when its not raining.
DiskDoctr
Platinum Member
Is your joystick sloppy or sticking? The Nimco valve on my tractor had a mechanical failure of the pivot point. This allowed the valve to actuate valves in a non-standard way.
Specifically, if I pushed too far forward, the loader would initially work as expected, but when the pivot point would lift out of place a bit, the rear valves would be pulled up farther than it was supposed to.
I think this somehow interfered with the normal flow of the circuits, causing a rapid reversal of the cylinder.
I'm sure others can explain this better.
You can try pushing the base of the joystick against the valve assembly and take note if it feels like it is slipping or lifting out of place. May feel a resistance (may feel like a detent), hear a clicking noise, or the valve may seem overly stiff or floppy.
If so, pull the boot up off the valve with the bucket fully down and the tractor off. Move the valve around and watch for any parts coming out of place. Make sure the joystick components pivot smoothly and completely.
Hope this helps!
- JC
I replaced my nimco valve because it leaked and the screw was stripped to get at the seals. I replaced it with a cheaper one from surplus?
Ok guys here is what I have come up with,
The cheaper valve is backwards compared to the nimco. The float for the boom will be to the left. Right now I have it straight up. As in up and down control boom and left to right control bucket. But the cheaper one from surplus is opposite. There is a:
First Spool Regen -
Fourth position allows for rapid
extension of cylinder.
This is supposed to be for the bucket not the boom. I will swap the working ports and post back the result.
-Tim
The cheaper valve is backwards compared to the nimco. The float for the boom will be to the left. Right now I have it straight up. As in up and down control boom and left to right control bucket. But the cheaper one from surplus is opposite. There is a:
First Spool Regen -
Fourth position allows for rapid
extension of cylinder.
This is supposed to be for the bucket not the boom. I will swap the working ports and post back the result.
-Tim
J_J
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How about some pictures.
Instead of mounting the valve horizontal, try mounting it vertical or sideways, and see if the levers are correct.
Instead of mounting the valve horizontal, try mounting it vertical or sideways, and see if the levers are correct.
will do. I am about to go and switch the working ports and use it for now backwards rather than fab something up. But before I do that I will take a video of how the valve works currently. Also a few pics. :thumbsup:
As promised here is a video and some pictures:
Original Leaky Nimco Valve (old picture I have previously taken):
new surplus valve:
new surplus valve 2:
new surplus valve 3:
working ports 1:
working ports 2:
J_J
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Maybe this will help as to the position of the levers and operation of the valve.
Just for reference. Third page .
http://www.surpluscenter.com/Instruct/I9-7401.pdf
Which ever way you have to mount the valve to get it to work like the illustration on page three.
Just for reference. Third page .
http://www.surpluscenter.com/Instruct/I9-7401.pdf
Which ever way you have to mount the valve to get it to work like the illustration on page three.
Troysie
Member
Hi Folks
Currently my loader is operating slower than it should, the CV432 control is first after the pump and before the remotes and 3pt hitch hydraulics, however there is a flow divider block in the pressure line just before the CV432 valve.
Is the Nimco CV432 an open circuit valve ?
Does it have an internal PRV, when I look at the valve on my tractor and compare to the same valve on the Nimco website the valve on the site has an external PRV showing just above the cable connection points, mine appears to be just a threaded in plug ?
I would like to remove my flow divider but I want to be sure that the CV432 control valve I have is going to bypass the pressure when my loader reaches the end of cylinder travel.
Thanks
Troy
Currently my loader is operating slower than it should, the CV432 control is first after the pump and before the remotes and 3pt hitch hydraulics, however there is a flow divider block in the pressure line just before the CV432 valve.
Is the Nimco CV432 an open circuit valve ?
Does it have an internal PRV, when I look at the valve on my tractor and compare to the same valve on the Nimco website the valve on the site has an external PRV showing just above the cable connection points, mine appears to be just a threaded in plug ?
I would like to remove my flow divider but I want to be sure that the CV432 control valve I have is going to bypass the pressure when my loader reaches the end of cylinder travel.
Thanks
Troy
J_J
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Zoom image Request Brochure
CV432
The CV432 is designed for medium to large loaders and for open center and series flow operation with minimum spool leakage.
Flow Range 100 Lpm or 26 Gpm
Pressure 320 bar or 4600 psi
Port Size BSP ｽ or SAE 10
Control Manual, Hydraulic or EHP
Option HPCO, Quick Coupler Unit
The valve is open center.
I believe there is a relief valve in the bottom left of the picture by the spool control.
That is a 26 GPM valve.
What is the pump size in GPM on this machine.
If your relief on your valve is a threaded plug, then they are using the relief on the hyd block for the protection to the circuit.
Why so you want to remove the flow control from the circuit?
Can you show another picture of the whole loader valve, and all sides of the hyd block with relief valve in it?
CV432
The CV432 is designed for medium to large loaders and for open center and series flow operation with minimum spool leakage.
Flow Range 100 Lpm or 26 Gpm
Pressure 320 bar or 4600 psi
Port Size BSP ｽ or SAE 10
Control Manual, Hydraulic or EHP
Option HPCO, Quick Coupler Unit
The valve is open center.
I believe there is a relief valve in the bottom left of the picture by the spool control.
That is a 26 GPM valve.
What is the pump size in GPM on this machine.
If your relief on your valve is a threaded plug, then they are using the relief on the hyd block for the protection to the circuit.
Why so you want to remove the flow control from the circuit?
Can you show another picture of the whole loader valve, and all sides of the hyd block with relief valve in it?
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