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Ford 9N, 2N & 8N Discussion Forum
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Re: 1939 Ford 9N Hyd. Question

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Casey Keele

06-30-2013 18:57:13

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anyone also got a trick for hooking the control valve up between the forks. it might just be me and my gotilla hands but that is a real pain doing it through the inspection holes. I got it after 45 minutes of grunting and cursing but was thinking i am doing something wrong.

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07-01-2013 06:29:21

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 Re: 1939 Ford 9N Hyd. Question in reply to Casey Keele, 06-30-2013 18:57:13  
I have found in my old age that the easiest way to reconnect the control valve arms is through the drain hole with needle nose and screwdriver or what ever it takes. Use safety goggles to keep oil from dripping in your eye.

Are you sure you didn't put the valves in wrong or maybe the gaskets backwards in the champers?

Gasket on the pump base with the pressure hole in the wrong place?????


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Casey Keele

07-01-2013 18:15:50

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 Re: 1939 Ford 9N Hyd. Question in reply to ZANE, 07-01-2013 06:29:21  
Thanks for the info Zane. I did put gaskets on right and I took it apart and rechecked thinking either the gaskets were blocking holes or something was blocking the tube running up to the cylinder. Everything was good. I did a good clean and flush of the sump area and soaked and cleaned the pump while i had everthing apart and out. I am going to try the control spring that Jason Suggested it is so looses i can move it around. unfortunalty it was rusted on so i will torch it and adjust it and see if that works

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07-01-2013 18:58:18

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 Re: 1939 Ford 9N Hyd. Question in reply to Casey Keele, 07-01-2013 18:15:50  
I don't think the looseness of the big draft spring is going to be your problem with it not lifting. The draft linkage can't go back any further than the anchor plate under that spring no matter how loose it is.

I would look at the spring that connects between the front of the ram cylinder and the center (Knee) section of the control arms. If that spring is weak it will not allow the control valve to be pushed forward with any pressure.

First thing I would do is to reach in and push those control legs forward with the PTO running making sure the control valve goes all the way forward.

One other thing I've run into a couple of times is the intake port in the control valve bushing being blocked by some foreign material. It that little hole is blocked it never will lift till it is cleared.

Did you remove the control valve bushing from the housing?

When the control valve spool is moved forward it opens the intake port and when it is moved backwards it opens the exhaust port. Intake port is toward the back of the bushing and the exhaust is toward the front of the bushing.

I have encountered times when the lift would not go down and found that the exhaust port was blocked with some sort of plastic like from an oil container.


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Casey Keele

07-07-2013 06:02:51

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 Re: 1939 Ford 9N Hyd. Question in reply to ZANE, 07-01-2013 18:58:18  
Did as you suggested and it is the spring that is not strong enough to pull back on the knee of the forks. Running into a problem finding a spring to replace it. I did get one at the hardware store but it has too much tension. Apparently these must not go bad often because i have searched high and low and no one carries a replacement.

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07-01-2013 05:57:57

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 Re: 1939 Ford 9N Hyd. Question in reply to Casey Keele, 06-30-2013 18:57:13  
no magic unfortunately. it's just like you said. and if ya got big paws. yep.. it can be a fight.

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Casey Keele

07-02-2013 19:13:36

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 Re: 1939 Ford 9N Hyd. Question in reply to soundguy, 07-01-2013 05:57:57  
Ended up being the spring that goes from the hydrualic cylinder to the control fork. i put in a new spring and the lift started working. goes up and down just fine....has a little jerky motion to it but will lift 500 lbs with no problem and no noises.

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07-03-2013 05:49:19

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 Re: 1939 Ford 9N Hyd. Question in reply to Casey Keele, 07-02-2013 19:13:36  
it should lift way more than that. probably 800 befor ehte front end gets light.

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