Ford 860 Hydraulics

I have an HV4901 hydraulic adapter kit installed on my Ford 860 tractor. I have a Cross, Converta-Valve set up to operate a single acting cylinder on the top link. The implement is light when empty, a concrete mixer.

It is plumbed to power up (retract) and to float down (extend). Up works fine. When the valve is activated down it will start to lower, then raise up, then lower. If I hold the valve in the down position after the implement is down, it will rise up, then go back down repeatedly in a very rhythmic manner.

While investigating, I removed the implement and used a chain between the top link and the hitch on my truck. With the lever in the down position, the tractor easily pulls to extend the cylinder, and will hold it extended with no brake applied. Moving the valve to retract the cylinder, will drag my truck if I apply the tractor brakes.

I don't believe the problem is in the valve or the adapter, but rather in the tractor. It seems like the return line may be pressurized for brief periods sometimes.

I am wondering if there is something wrong withthe hydraulics on my tractor? Maybe the empty mixer is just too light to extend the cylinder and I should switch to a double acting top link?

Thanks,

John

Is your system a true remote valve or a diverter valve?

If a diverter valve, turn the draft control off.

May or may not help depending upon the condition and adjustments of the internal mechanism in the lift cover.

Dean

I am not sure how to respond. I have this adapter installed https://www.yesterdaystractors.com/HV4902_Hydraulic-Adapter-Kit_10640.htm

With this remote valve. https://crossmfg.com/hydraulics/valves/directional-valves/converta

I have never used draft control. I think I have it off. The lever is horizontal, pretty much flush with the top of the case. The hydraulic adapter prevents it from rising above the case, but I can push it down to about 45 degrees. I have not tried the hydraulic with it pushed down, it is raining here, I just now ran outside to check so I could respond.

My 3 point has always lifted fine, but it does "pulsate" a little when it has a heavy load lifted. It drifts down just a little then is lifted back up.

Not familiar with your remote valve-but-draft control is on when the lever is
horizontal, and off when it is vertical. Mark.

So.. I have been running with it on all these years?

Do you push Down to turn it off, or does it have to move UP to turn off?

Read manual instead of listening to unknowns. Lever horizontal is Position control. Lever pointing down (90 deg from horiz) is in Draft mode.

At least that's how an 8n works. Mark.

(quoted from post at 17:35:00 05/21/20) At least that's how an 8n works. Mark.

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Ford 860 isn't a Ford 8N. See that here all the time, where someone just assumes that whatever their experience is will fit whatever the other guy has. Done it myself with front /side mount distributors on 8Ns. Doesn't always work out. What they do have in common in this area is that lever CCW is Position control and CW is Draft control. Also, when moving the lever, if in the direction where you feel the compressing of a spring, then you are moving to Draft control , whereas if you move in direction where you feel a spring releasing and lever tries to jump out of your fingers, then you are moving to Position control.
...and on his 860, just remember the "D"s......lever pointing down is for ground engaging implements (Draft control)
[b:45b971d0fc]D[/b:45b971d0fc]own
[b:45b971d0fc]D[/b:45b971d0fc]raft
[b:45b971d0fc]D[/b:45b971d0fc]irt
[b:45b971d0fc]D[/b:45b971d0fc]evil

I have an update and a new question.

I finally got around to mixing concrete with this set up. The single acting cylinder works ok when there is 500+ pounds of concrete in the drum. But when it gets lighter, the down operation is not consistent and actually dangerous, since it sometimes move up with you tell it to go down.

It seems to be associated with the 3 point hydraulics.

I am going to switch to a double acting top link, I have always wanted one anyway. If that does not work, I will have to get deeper into the tractor hydraulics.

I will ask the question in a new thread.

Thanks for the input on this one.

Just in case someone else has an issue with this. I found the problem with the set up that I have. When the engine is much above idle, there is too much volume from the hydraulic valve to allow to pass easily. If it is running too fast, and I try to slowly activate the valve, back pressures from the bypass, flow backward in the valve causing the cylinder to move the wrong direction. At idle everything works as it should.

I contacted the Cross valve company about it. They told me I have the wrong valve. But the one I have serves my purpose as long as I idle the engine when I need to adjust position of the mixer.

(quoted from post at 03:31:26 05/29/20) I have an update and a new question.

I finally got around to mixing concrete with this set up. The single acting cylinder works ok when there is 500+ pounds of concrete in the drum. But when it gets lighter, the down operation is not consistent and actually dangerous, since it sometimes move up with you tell it to go down.

It seems to be associated with the 3 point hydraulics.

I am going to switch to a double acting top link, I have always wanted one anyway. If that does not work, I will have to get deeper into the tractor hydraulics.

I will ask the question in a new thread.

Thanks for the input on this one.

Click to expand...