Dearborn control valve kit or replacement

I have 2 NAA with FEL Dearborn models 19-22 & 19-23. Both creep. From what I've read thus far on the forums suspect both control valves need rebuilt. I've also noted on the forums that rebuilt kits for these out-of-production models is near impossible to find {Best of luck!}. :shock:

I'm asking any tractor guru out there who can offer suggestions as to where I may find such a kit or hyd shop if it exists; or where I could purchase a suitable alternative (after market) single/dual spool control valves that will install (valve orientation) properly to the FEL mount without much modification.

Kind regards.

(quoted from post at 13:10:56 09/02/14) I have 2 NAA with FEL Dearborn models 19-22 & 19-23. Both creep. From what I've read thus far on the forums suspect both control valves need rebuilt. I've also noted on the forums that rebuilt kits for these out-of-production models is near impossible to find {Best of luck!}. :shock:

I'm asking any tractor guru out there who can offer suggestions as to where I may find such a kit or hyd shop if it exists; or where I could purchase a suitable alternative (after market) single/dual spool control valves that will install (valve orientation) properly to the FEL mount without much modification.

Kind regards.

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Creep is often caused by a leaky cylinder - I'd rule that out first.

The spools in the OEM valves do not have port seals so if they are leaking internally the spools and/or block are worn - e.g. not servicable. The 19-22 uses a single acting one spool valve. The 19-23 is a two spool valve with one single acting and one double acting spool. Either one can be easily replaced using a modern OTS open center valve.

[u:13269f2772]Single Spool Valve[/u:13269f2772]

[u:13269f2772]Two Spool Valve[/u:13269f2772]

They are not going to mount or plumb into the system exactly the same as the OEM valves. You would need to make a few simple modifications - nothing that is rocket science or requires a machine shop.

TOH

(quoted from post at 10:46:51 09/02/14)

(quoted from post at 13:10:56 09/02/14) I have 2 NAA with FEL Dearborn models 19-22 & 19-23. Both creep. From what I've read thus far on the forums suspect both control valves need rebuilt. I've also noted on the forums that rebuilt kits for these out-of-production models is near impossible to find {Best of luck!}. :shock:

I'm asking any tractor guru out there who can offer suggestions as to where I may find such a kit or hyd shop if it exists; or where I could purchase a suitable alternative (after market) single/dual spool control valves that will install (valve orientation) properly to the FEL mount without much modification.

Kind regards.

Click to expand...

Creep is often caused by a leaky cylinder - I'd rule that out first.

The spools in the OEM valves do not have port seals so if they are leaking internally the spools and/or block are worn - e.g. not servicable. The 19-22 uses a single acting one spool valve. The 19-23 is a two spool valve with one single acting and one double acting spool. Either one can be easily replaced using a modern OTS open center valve.

[u:ebf3a1e529]Single Spool Valve[/u:ebf3a1e529]

[u:ebf3a1e529]Two Spool Valve[/u:ebf3a1e529]

They are not going to mount or plumb into the system exactly the same as the OEM valves. You would need to make a few simple modifications - nothing that is rocket science or requires a machine shop.

TOH

Click to expand...

Thank you so much for your reply and your links to the hydraulic control valves. I'm concerned the replacement valves mount horizontally and not vertical as the original config.. This looks like I will require a little engineering for fabricating a bracket and may require new hose & fittings if I were to take a guess. I cannot but feel out of my league. I'm not so creative mechanically. I'm confident enough to rebuild the values themselves however.

You said I should "rule out a leaky cylinder first" I did verify no external leaks at all the cylinders first. I suppose they could be leaking internally however but not sure how to accomplish that test. I did verify that I have external leakage @ both control valves. Really bad on the single vs the dual valve yet the 19-22 seems to creep much slower than the 19-23. The bucket on the 19-23 also creeps full cycle in less than 10 sec.

Don't underestimate yourself about mounting the valve. I use that very same dual spool valve. It can be mounted in either position.
A few bolts and a mounting plate or bracket is all you need.

As for the old spool valves, TOH is correct they are not serviceable aside a few o-rings that are replaceable which will have nothing to do with the leak down, no other part can be replaced. There are no rebuild kits. Once the internal spools wear down, there is nothing that you can do with them.

I run a 19–70 Dearborn loader. Probably drops 8 to 10 inches a minute. I just feather the valve each Time the bucket drops. I never keep the bucket raised unless I am using the loader. I like keeping the old valve for nostalgia purposes.

(quoted from post at 14:46:13 09/02/14) You said I should "rule out a leaky cylinder first" I did verify no external leaks at all the cylinders first. I suppose they could be leaking internally however but not sure how to accomplish that test. I did verify that I have external leakage @ both control valves. Really bad on the single vs the dual valve yet the 19-22 seems to creep much slower than the 19-23. The bucket on the 19-23 also creeps full cycle in less than 10 sec.

Click to expand...

The single acting cylinders cannot leak internally. If there are no external leaks they will hold "forever. The double acting cylinder can leak internally causing the bucket to drift down.

The valves have external seals on the spools. You might be able to match the seals up to a generic oil seal and make replacement gaskets. That might fix external leaks but won't fix any internal leakage between the spool and the body.

Personally I think the OEM valve mounting on both loaders is terrible and not at all operator friendly. I'd put them someplace more user friemdly but I'm a thoroughly Modern Millie ;-) Looking at the parts manual I think I could even find a way to mount the new valve in the same location and orientation as the OEM ones. They both have top as well as side ports for the supply and return lines so they are amenable to just about any position and the levers can also be re-positioned if need be.

If you can handle a valve rebuild the re-plumbing should be a piece of cake. Yes - you will need a number of hoses and hydraulic fittings to do it. The connections are straight forward and if you want I can give you a diagram of how to plumb them in.

TOH

"If you can handle a valve rebuild the re-plumbing should be a piece of cake. Yes - you will need a number of hoses and hydraulic fittings to do it. The connections are straight forward and if you want I can give you a diagram of how to plumb them in." TOH[/quote]

TOH
I would be most grateful & shall take up your offer for a diagram. I didn't realize the levers orientation were amenable, that's a plus. I'll take a closer look at the parts manual & my own set up after work today, then take an assessment of what hardware will be required. Thank you so much for your input. Regards. WLH

Thank you for your vote of confidence and words of encouragement. The NAA is my first attempt at a restoration & I've been learning a lot on this journey. What an awesome machine still today!

I'll take your advice Greywolf224 and TOH's. Thank you both so much!

I've noted when reviewing the forums post's that there are really great mentors (In amateur radio we call them "Elmer's") packed with knowledge and expertise who freely willing to pass it forward.
wlh

(quoted from post at 16:06:33 09/02/14) "If you can handle a valve rebuild the re-plumbing should be a piece of cake. Yes - you will need a number of hoses and hydraulic fittings to do it. The connections are straight forward and if you want I can give you a diagram of how to plumb them in." TOH

Click to expand...

TOH
I would be most grateful & shall take up your offer for a diagram. I didn't realize the levers orientation were amenable, that's a plus. I'll take a closer look at the parts manual & my own set up after work today, then take an assessment of what hardware will be required. Thank you so much for your input. Regards. WLH[/quote]

You can contact me by email or call me "just about anytime" that is a decent hour on the east coast ;-)

TOH

[email protected]
301.655.0631