Hydraulic drip

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johnthomas
Posts: 20
Joined: Wed Feb 28, 2018 5:55 pm
Zip Code: 19440

Hydraulic drip

Postby johnthomas » Sun Jul 28, 2019 3:24 pm

Changed hydraulic fluid on the 1951 cub. Works fine,but this morning noticed a slow leak/drip under the filler box. I checked past post couldn't find solution.Tractor sat 10 years,everything else with system works fine..When I changed fluid noticed it was low. Thanks for any suggestions.

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Glen
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Posts: 5401
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Hydraulic drip

Postby Glen » Sun Jul 28, 2019 6:16 pm

Hi,
First, look and see if the Touch Control block is leaking from the front, if fluid runs down on the clutch housing. If it leaks from the front of the unit, the Control Valve o ring could be wornout, and need replacing.
The Touch Control cylinder and piston could be leaking, that is higher up than the control valve.
Use a light, and try to see if, or where it is leaking.

Below is a listing at TM Tractor showing a new Control Valve o ring, it is a Case IH part, it says. There is a pic there showing where it is.
The valve pulls out the front of the block. You don't need to remove the Touch Control head to replace the control valve o ring.
You may need to remove the 4 bolts that hold the unit onto the clutch housing, the tubes, and the control lever rod, and turn it to the left to get the valve out. You have to lift it some, the bolt heads for the bottom cover would keep it from turning it to the side. Or you can remove the unit and set it on your work bench.
Drain the system first, like the owner's manual says, remove the filler plug, then the drain plug.

Whenever disassembling a Touch Control, it should be clean. Don't allow any dirt or grit inside the unit.
If you need to replace the o ring, clean the area well, and use plenty of Hy-Tran fluid on the o ring and valve, when putting the o ring on the valve, and when putting the valve into the unit again.
Feel the area around the hole for the valve in the block, be sure it is smooth and clean.
Any roughness can cut the new o ring.

Sometimes people have the engine out of the tractor, and then they don't put in enough fluid in the Touch Control, because they may not know how much to put in it, they just didn't put in enough in the past.

http://www.tmtractor.com/new/hy/674fp.htm

When you get it to work, remember to fill the unit the last time with the arms in the rear or down position, like the Cub owner's manual says. :)

johnthomas
Posts: 20
Joined: Wed Feb 28, 2018 5:55 pm
Zip Code: 19440

Re: Hydraulic drip

Postby johnthomas » Sun Jul 28, 2019 6:24 pm

Thank you.

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Don McCombs
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Zip Code: 21550
Tractors Owned: "1950 Something" Farmall Cub
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Location: MD, Deep Creek Lake

Re: Hydraulic drip

Postby Don McCombs » Sun Jul 28, 2019 6:49 pm

To identify the leak location, spray the lower part the Touch Control unit with something like Simple Green. Rinse with a hose or pressure washer. Let dry. Dust the area with talcum powder or flour. Watch for the location of the leak to appear.
Don McCombs
MD, Deep Creek Lake

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Proud Member of Maryland Chapter 39
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Glen
10+ Years
10+ Years
Posts: 5401
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Hydraulic drip

Postby Glen » Sun Jul 28, 2019 6:50 pm

Hi,
If you take the unit off the Cub, that is a good time to remove the bottom cover, and clean the strainer.
The strainer is visible from the bottom of the unit, but can't be removed that way. It comes out the end, after removing the Touch Control head.
You can also wash out any dirt or goop up in the bottom of the unit.
Sometimes the strainer screen breaks from being old, then it needs a new strainer.
Below is a listing for a new strainer, you can look at the pics. :)

http://www.tmtractor.com/new/hy/918fp.htm

Below are pics of the block.
1st pic shows the Control Valve, at the lower right.
2nd pic shows the bolts holding the bottom cover on.
3rd pic shows inside the bottom, the strainer is not in place.
TM Tractor has a new gasket for the bottom cover.
Attachments
Cub T C 4.jpg
Cub T C 6.jpg
Cub Touch Control 2.jpg

johnthomas
Posts: 20
Joined: Wed Feb 28, 2018 5:55 pm
Zip Code: 19440

Re: Hydraulic drip

Postby johnthomas » Sun Jul 28, 2019 6:52 pm

Checked the 2 lines from the front to the small block attached to the main fluid source, no leaks. Went around to the right side and noticed a rubber gromlet under the hydralic block or unit that contains the fluid , is a little wet.It seems to me that that whole "hydraulic unit "needs to come out
To replace the seal under it..Thank.you.

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Glen
10+ Years
10+ Years
Posts: 5401
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Hydraulic drip

Postby Glen » Sun Jul 28, 2019 7:04 pm

Hi,
The gasket on the bottom cover could be leaking. The bolts could need tightening, or the gasket might need replacing. Use sealer on a new bottom gasket, it helps prevent leaking.
Yes, the Touch Control has to come off the tractor to tighten the bottom cover bolts, or replace the bottom gasket.
Read my post above, we posted at about the same time. :)

johnthomas
Posts: 20
Joined: Wed Feb 28, 2018 5:55 pm
Zip Code: 19440

Re: Hydraulic drip

Postby johnthomas » Sun Jul 28, 2019 7:05 pm

I just want to xpress my appreciation to all who helped me.It doesn't look that hard to remove that unit? Is it.

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Glen
10+ Years
10+ Years
Posts: 5401
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Hydraulic drip

Postby Glen » Sun Jul 28, 2019 7:12 pm

Hi,
It is easier to remove the Touch Control with the hood off. Someone said lately they removed one with the hood on, not sure which side it went out.
The starter rod, and choke rod probably need to be removed to remove the Touch Control.

Below is a listing at TM Tractor for a new bottom cover gasket, you can see what it looks like. :)

http://www.tmtractor.com/new/hy/471fp.htm

johnthomas
Posts: 20
Joined: Wed Feb 28, 2018 5:55 pm
Zip Code: 19440

Re: Hydraulic drip

Postby johnthomas » Sun Jul 28, 2019 7:16 pm

I think your right the gas tank needs to be removed to get the job done... ...nice Saturday project.
Thanks.

johnthomas
Posts: 20
Joined: Wed Feb 28, 2018 5:55 pm
Zip Code: 19440

Re: Hydraulic drip

Postby johnthomas » Sun Jul 28, 2019 7:17 pm

I MEANT hood...

johnthomas
Posts: 20
Joined: Wed Feb 28, 2018 5:55 pm
Zip Code: 19440

Re: Hydraulic drip

Postby johnthomas » Sun Jul 28, 2019 8:00 pm

Thanks Glenn for the pictures and advice. As I study them It gives me a better understanding of the unit. Will try tighting bottom bolts tomorrow .I am amazed at the engineering of this 68 year old machine..

Gary S.
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Re: Hydraulic drip

Postby Gary S. » Sun Jul 28, 2019 10:35 pm

johnthomas wrote: I am amazed at the engineering of this 68 year old machine..


That's why they are still working to this day- a time before planned obsolescence

User avatar
Glen
10+ Years
10+ Years
Posts: 5401
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: Hydraulic drip

Postby Glen » Sun Jul 28, 2019 11:48 pm

Hi,
If you take off the bottom cover, to clean the strainer, and the strainer screen is torn, then you would need to remove the Touch Control head to replace the strainer. So then, you might as well replace the o rings in the block.
TM Tractor has o ring kits for them. You have to know the block part number to get the right kit. The part number is on the left side of the block.

johnthomas
Posts: 20
Joined: Wed Feb 28, 2018 5:55 pm
Zip Code: 19440

Re: Hydraulic drip

Postby johnthomas » Sun Jul 28, 2019 11:53 pm

Thank you.


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