IH 240 hydralics

judesson · Aug 20, 2015

1958 IH 240 hydralic problem

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I have a IH 240 that sat for 2 years and the hyd fluid leaked out from the cylinder in the back. Before sitting for 2 years the lift was very strong although it did leak a little at the back cylinder. Now the lift will not operate , the back cylinder is in the raised extended position. I have added more hyd fluid and worked the lever back and forth , I have also tried this is a downhill position -- no movement . I read in the operators manual about a control valve pin to switch from single or double action
I was told it sounds like it got switched to the single action? I cannot find this on the tractor , I see it in the oper man photos but no luck on the tractor . Any help finding this would be most helpful or any other ideas to bring this lift back to life.

thank Judesson
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K-Mo · Aug 21, 2015

Judesson,
I assume the rear cylinder you are talking about is for the OEM 2-Pt/3-Pt. The control valve is on the left side of the hydraulic valve bank. The hitch valve will not have a single/double selector.

The hitch cylinder valve requires feedback cancellation. When you move the control lever it activates the valve to move the hitch. There is a feedback mechanism that tells the valve when the hitch has reached position and stops. Early version used a troublesome feedback cable that ran from the left side of the hitch rockshaft to the valve. The valve on this version has two levers on the valve one connected to the control lever and the other connected to the feedback cable. The feedback was later changed to a mechanical cancellation in the control linkage. This version only has one lever on the control valve.

Simply put, the Control Handle, Valve and Cylinder all have to "talk" to each other. If yours has the feedback cable, it may have seized up after sitting for 2 years and is not providing feedback to the valve. If this is the case, move the control lever to a midpoint. disconnect the feedback cable from the valve and manually move the feedback lever. The hitch should move. If you have a defective feedback cable, I don't think there is any replacement available. On mine, I fabricated mechanical feedback linkage based on OEM linkage and use the two lever valve by anchoring the valve feedback lever in a neutral position.

This may not be the answer to your problem, but would be the first I would checkout. This is all referenced to my IH 240U w/Tela-Depth.

If you have a two lever control valve you may have an internal issue with the beveled gears. Here's a picture. http://partstore.caseih.com/us/parts-search.html#epc::mr56560ar843169

If your hydraulic system stays under high pressure, it would be an indication of a feedback problem.

Good Luck
K-Mo

judesson · Aug 21, 2015

(quoted from post at 04:44:29 08/21/15) Judesson,
I assume the rear cylinder you are talking about is for the OEM 2-Pt/3-Pt. The control valve is on the left side of the hydraulic valve bank. The hitch valve will not have a single/double selector.

The hitch cylinder valve requires feedback cancellation. When you move the control lever it activates the valve to move the hitch. There is a feedback mechanism that tells the valve when the hitch has reached position and stops. Early version used a troublesome feedback cable that ran from the left side of the hitch rockshaft to the valve. The valve on this version has two levers on the valve one connected to the control lever and the other connected to the feedback cable. The feedback was later changed to a mechanical cancellation in the control linkage. This version only has one lever on the control valve.

Simply put, the Control Handle, Valve and Cylinder all have to "talk" to each other. If yours has the feedback cable, it may have seized up after sitting for 2 years and is not providing feedback to the valve. If this is the case, move the control lever to a midpoint. disconnect the feedback cable from the valve and manually move the feedback lever. The hitch should move. If you have a defective feedback cable, I don't think there is any replacement available. On mine, I fabricated mechanical feedback linkage based on OEM linkage and use the two lever valve by anchoring the valve feedback lever in a neutral position.

This may not be the answer to your problem, but would be the first I would checkout. This is all referenced to my IH 240U w/Tela-Depth.

If you have a two lever control valve you may have an internal issue with the beveled gears. Here's a picture. http://partstore.caseih.com/us/parts-search.html#epc::mr56560ar843169

If your hydraulic system stays under high pressure, it would be an indication of a feedback problem.

Good Luck
K-Mo

judesson · Aug 21, 2015

K-mo I have added some pictures although not as "clean" as I wanted to include in my reply the lever in the background moves by the lever at the
side of the tractor seat. the lever in the forgound does not move and it is confusing to be because it looks like a mech lever on crank case side but in the picture of the axel it looks more like a fluid line?? And is this where the control valve is switched from single to double action? As stated in my earlier post the lift was working strong
before it sat and leaked off. I did not mention that I had cleaned and repainted the tractor and I am not sure if it worked after that. Could the cylinder at the lift be struck because of paint or degreaser? thanks for the help Judesson

K-Mo · Aug 22, 2015

Your feedback cable can be seen in the picture next to the "D" handle and runs to the foreground lever on the valve. The one that is anchored to the bracket below the valve.
Move the Control lever to a mid position. Loosen the cable from the anchor bracket and manually move the foreground valve lever. The hitch should move.

The hitch valve doesn't have a single/double action selector. If you look at the forward end of the remote valves you should see a roll pin through the end of valve spool held in selected position by a spring clip. Turning the end of the valve spool changes from single to double action operation.

It's not likely painting would effect the cylinder, but possibly could have "glued" the feedback cable at the end near the valve.

I hope I'm not leading down a blind alley, but the feedback cable was problematic. I believe IH had produced a field change kit to replace the feedback cable with a single lever valve and mechanical linkage.

judesson · Aug 22, 2015

(quoted from post at 04:47:21 08/22/15) Your feedback cable can be seen in the picture next to the "D" handle and runs to the foreground lever on the valve. The one that is anchored to the bracket below the valve.
Move the Control lever to a mid position. Loosen the cable from the anchor bracket and manually move the foreground valve lever. The hitch should move.

The hitch valve doesn't have a single/double action selector. If you look at the forward end of the remote valves you should see a roll pin through the end of valve spool held in selected position by a spring clip. Turning the end of the valve spool changes from single to double action operation.

It's not likely painting would effect the cylinder, but possibly could have "glued" the feedback cable at the end near the valve.

I hope I'm not leading down a blind alley, but the feedback cable was problematic. I believe IH had produced a field change kit to replace the feedback cable with a single lever valve and mechanical linkage.

thanks again k-mo as far as the blind alley goes you know a lot more about this 240 than I do and all you help is very helpful I will follow your advise and repost in a day or two thanks again Judesson

judesson · Aug 22, 2015

(quoted from post at 08:12:39 08/22/15)

(quoted from post at 04:47:21 08/22/15) Your feedback cable can be seen in the picture next to the "D" handle and runs to the foreground lever on the valve. The one that is anchored to the bracket below the valve.
Move the Control lever to a mid position. Loosen the cable from the anchor bracket and manually move the foreground valve lever. The hitch should move.

The hitch valve doesn't have a single/double action selector. If you look at the forward end of the remote valves you should see a roll pin through the end of valve spool held in selected position by a spring clip. Turning the end of the valve spool changes from single to double action operation.

It's not likely painting would effect the cylinder, but possibly could have "glued" the feedback cable at the end near the valve.

I hope I'm not leading down a blind alley, but the feedback cable was problematic. I believe IH had produced a field change kit to replace the feedback cable with a single lever valve and mechanical linkage.

Click to expand...

thanks again k-mo as far as the blind alley goes you know a lot more about this 240 than I do and all you help is very helpful I will follow your advise and repost in a day or two thanks again Judesson

K-mo your advise on the feedback cable was spot on, I worked the cable free and the lift started to work Their was a lever at the back of the tractor that would move this cable also?
Anyway thanks for all the help, guys like you make this forum what it is. have a good one Judesson

IH 240 hydralics

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