Loader Hydraulics

History: Several years ago I bought my first tractor, a '54 NAA. I was having trouble with an intermittent starter; thought it was the push button. Found no guidance in the FO-19 manual; asked the local Ford/New Holland dealer if the push button assembly just unscrewed from the top or whether the tranny top plate had to be removed. Was told to just unscrew it from the top. That, of course ruined the push button, dropped the nut and lock washer into the tranny, and began another adventure in my education. I then signed into this site, asked the question, got some great advice including, 'step away from the tractor, put your tools on the floor, and don't move until you know what the heck you are doing!' Harsh, but very good advice! I bought a new push button, fished the nut out of the tranny, replaced the starter (real cause of the intermittent problem) and have been using my favorite (only) tractor since for general maintenance of roads, hay production, and dirt work.

In the intervening years I have been a regular reader of this forum and have a great deal of respect for the knowledge and hands on experience represented here. I have learned alot! So, before I learn the hard way again, I'm asking the question here first. (Won't bother the folks at my local dealership on this one.) I have a 700 Series loader on my tractor with a front pump. The frame of the loader is the fluid reservoir. A dual spool hydraulic valve is integral to the loader with the filter plumbed out the bottom of the valve to a screw on filter. There is a 2nd single spool valve powered out of the first one. The single spool still works and is a Cressen. I'm told that it is no longer made nor supported; no parts available. The dual spool valve body is cracked and leaks like a sieve. My right boot is a different color than the left one and sheds water better, plus hydraulic fluid isn't cheap. Twice, I have removed the valve from the tractor, removed all internal rubber parts to avoid heat damage, and had it brazed by a local welder. Each time, the leak has stopped for awhile and then reappears as the crack extends beyond the brazed repair. Ford no longer supports this valve, and I need to find a replacement.

In choosing an after market valve, what sources do I have? Should I stick with a dual spool with the existing plumbed single spool or bite the bullet now and install a 3 spool valve? Is a filter necessary? If so, where should it be placed? Thank you for your help and I'm standing by with tools on the floor and my hands above my head waiting on your replies.
 
Surplus supply is a good place to get a new valve assembly or Northern Hyds also has them. If the link works that should help you with what you need
Hyd parts
 
(quoted from post at 16:55:09 06/26/15) History: Several years ago I bought my first tractor, a '54 NAA. I was having trouble with an intermittent starter; thought it was the push button. Found no guidance in the FO-19 manual; asked the local Ford/New Holland dealer if the push button assembly just unscrewed from the top or whether the tranny top plate had to be removed. Was told to just unscrew it from the top. That, of course ruined the push button, dropped the nut and lock washer into the tranny, and began another adventure in my education. I then signed into this site, asked the question, got some great advice including, 'step away from the tractor, put your tools on the floor, and don't move until you know what the heck you are doing!' Harsh, but very good advice! I bought a new push button, fished the nut out of the tranny, replaced the starter (real cause of the intermittent problem) and have been using my favorite (only) tractor since for general maintenance of roads, hay production, and dirt work.

In the intervening years I have been a regular reader of this forum and have a great deal of respect for the knowledge and hands on experience represented here. I have learned alot! So, before I learn the hard way again, I'm asking the question here first. (Won't bother the folks at my local dealership on this one.) I have a 700 Series loader on my tractor with a front pump. The frame of the loader is the fluid reservoir. A dual spool hydraulic valve is integral to the loader with the filter plumbed out the bottom of the valve to a screw on filter. There is a 2nd single spool valve powered out of the first one. The single spool still works and is a Cressen. I'm told that it is no longer made nor supported; no parts available. The dual spool valve body is cracked and leaks like a sieve. My right boot is a different color than the left one and sheds water better, plus hydraulic fluid isn't cheap. Twice, I have removed the valve from the tractor, removed all internal rubber parts to avoid heat damage, and had it brazed by a local welder. Each time, the leak has stopped for awhile and then reappears as the crack extends beyond the brazed repair. Ford no longer supports this valve, and I need to find a replacement.

In choosing an after market valve, what sources do I have? Should I stick with a dual spool with the existing plumbed single spool or bite the bullet now and install a 3 spool valve? Is a filter necessary? If so, where should it be placed? Thank you for your help and I'm standing by with tools on the floor and my hands above my head waiting on your replies.

Unless there is some sort of non-standard OEM type hydraulic connection these are simple standard parts - brands don't really matter. You can use 3 single spool valves in parallel, a two spool valve paired with a single spool valve, or a three spool valve. What does matter is what sort of control you need on the individual spools. Are they all double acting? If so I would replace both valves with something like this and never look back:

[u:2f0005f51a]Three spool Prince valve[/u:2f0005f51a]

TOH
 
Thanks for your replies; looking at three spool valves now. What about a filter? Is that necessary or could I plumb up the new system without a filter?
 
(quoted from post at 13:54:22 06/29/15) Thanks for your replies; looking at three spool valves now. What about a filter? Is that necessary or could I plumb up the new system without a filter?

If you can find a way to put it in the circuit a return line filter is an excellent idea. Particulate matter is the number one enemy of hydraulic systems....

TOH
 

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