Case 440 front end loader attached, not working

alexw · Mar 28, 2015

I purchased this tractor with a front end loader, and have finally got around to installing it. It came disassembled with no lines, so I plumbed with new ones.

After attaching everything, the loader is not responding. It is plumbed to run off of the same fluid supply as the 3-point hitch.

Is there something I'm missing, or does it take a long time to push the air out of the system?

Thanks,
Alex

Adirondack case guy · Mar 28, 2015

You have it plumbed wrong. The coupling you have Teed into the 3pt hitch should be plumbed to the pipe nipple with the cap on it. Get rid of the Tee and hook 3pt hose to the elbow on selector valve. Now you can select 3pt operation, or loader operation by moving the selector spool. You will have to tie the 3pt lever open to provide hydraulic flow when you are using the loader 2 spool valve.
The OM that I scaned shows a hookup for a tractor with dual remotes and direct hook up to lift cylinders, rather than a 2 spool. That is why when you select loader operation, you have to tie the lever open to supply the spools.
Loren

Adirondack case guy · Mar 28, 2015

After takeing a second look at your pic. of your selector valve and the snap ring grove with no snap ring and no knob, you may also have an issue on the positioning of the spool to allow oil flow to either the 3pt., or 2 spool ldr. valve also.
Loren

L.Fure · Mar 29, 2015

(quoted from post at 20:22:49 03/28/15) I purchased this tractor with a front end loader, and have finally got around to installing it. It came disassembled with no lines, so I plumbed with new ones.

After attaching everything, the loader is not responding. It is plumbed to run off of the same fluid supply as the 3-point hitch.

Is there something I'm missing, or does it take a long time to push the air out of the system?

Thanks,
Alex

I'm wondering if the twin spool hydraulic valve is original to the loader? Could the port you are using for a return port be a power beyond port? Are there anymore ports on the right side of the twin spool valve? Maybe one on the bottom of the valve housing? The reason I'm asking is if your valve has a power beyond port, and also a return port, you won't need the selector valve. You will need a supply line direct from the pump to the twin spool. Then run the power beyond hose to feed the three point hitch, which should have it's own return line. The return port, on the twin spool, is then fed back to the hydraulic reservoir. If your twin spool doesn't have a power return port you can buy one on eBay for a little under $200.00. What I described is the way I have the plumbing hooked up on my IH 340 utility. I know the brand is different, but the hydraulics should be similar.

alexw · Mar 29, 2015

Loren had it. I actually figured it out a few minutes after posting. What was odd to me that the location pictured for the quick disconnect is how it was installed when we bought it.

Moving the disconnect to the right side of the spool and then switching it over worked. In time, I'll eventually do a different type of setup, as it is a bit silly to push the spool forward one notch, tie back the 3-point actuator, then work the loader.

I knew when I bought it that one of the cylinders leaked, but wasn't told which one. I've now discovered that both of the main lift cylinders need rebuilding. Or replacing considering that one of them was converted from a threaded to welded design...

So while they are being rebuilt, I can spend a bit of time clearing out that mess of fittings from the spool unit to the 3-point.

Thanks!
Alex

Adirondack case guy · Mar 29, 2015

The tractor does not have two spool dual hyds. There is only one handle below the seat to control the single acting 3pt. hitch cylinder and the return from the added 2 spool ldr valve is going to the fill plug in the range cover. That 440 is also a 4 spd without hand clutch to stop wheel rotation and providing for the constant running pto, and no dual or tripple range under where the blue hose is plumbed.
Loren

Adirondack case guy · Mar 29, 2015

The way the tractor is plumbed now, one would have to move the lever to raise the 3pt. to the top, disconect the linkage from the arms that cansel out and return the lever to neutral, to back feed the aux loader valve. Not a good idea, as it could destroy the 3pt housing under the seat.
Loren

BarryfromIA · Mar 29, 2015

There is a top casting cover for the hydraulic stack valve on the tractor that lets the pressure flow beyond to your loader valve. It istock on a 210b with a factory loader and pump in the torque tube.

Adirondack case guy · Mar 29, 2015

You will have to tie the lever back to use the loader unless you can find a cover like mentioned below to pull hydraulic flow directly from pump in the torque tube. In the pages from a Case 291 ldr OM that I posted earlier,they show direct hookup to dual spool tractor hydraulics. The boom cylinders were single acting, like 3pt cyl., and the selector valve was installed so you could use the 3pt lever to raise the boom, or the 3pt. and the second lever for double acting remotes that you don't have to operate the bucket. You are feeding the aux ldr. valve with flow designed to raise the 3pt. and just diverting it to your ldr. valve, and returning it to sump with the blue hose. It will work just fine that way, but you won't be able to use 3pt. and loader simultaneously.
Loren

L.Fure · Mar 29, 2015

(quoted from post at 22:32:57 03/29/15) There is a top casting cover for the hydraulic stack valve on the tractor that lets the pressure flow beyond to your loader valve. It istock on a 210b with a factory loader and pump in the torque tube.

Having a power beyond port from the tractors three point valve would be the simplest way to hook up the loader valve. That would give the option of being able to remove the loader if that ever has to happen. A direct hookup from the pump makes this impossible. When you unhook the hose from the pump you will have to hook it back into the system someplace. You won't be able to just plug the pump outlet and not have it working against the pumps pressure relief valve.

alexw · Mar 29, 2015

What do you mean by the tractor not having two spool dual hydraulics?

I'm not sure if the loader twin spool valve has a power beyond port. Where the blue hose is connected is the only port on that side of the valve. So I presume that means it's only a return port. The twin spool did come with the loader. All the plumbing as originally posted was as I received. The loader unit itself and hoses from the twin spool to the cylinders were all I did.

Do you have a part number for the 210b casing?

I'm fine with holding back the 3pt lever at the moment. The valve sticks in the full rear and full forward positions anyway.

Thanks,
Alex

Adirondack case guy · Mar 29, 2015

lfure,
Most of these either single or two spool service valves didn't have the power beyond cover on them. they had a cast plate on top that returned flow to sump controlled by the pilot valves in each valve body, be it one or more, but there was only room for two service valves under the fuel tank, but more could be added with fuel tank mods, and control linkage fabed to operate them. The valve bodies could also be rotated 180* so the ports were either on the RH or LH of the tractor.
The cover refered to would replace the G1232 pn. It may have been used on some 210Bs and in later years when DOM came out on 4-530s-70s it was used to operate the rear mounted draft control 3pt valve mounted under the right side of the seat. This PB cover is not present on the 440 in question.
Do you have a working knowledge of this system, or are you just theroizing??
Loren

casenut1 · Mar 29, 2015

Sure glad I grew up on a 770 with a loader.It is a lot simpler.

L.Fure · Mar 30, 2015

(quoted from post at 02:24:44 03/30/15) lfure,
Most of these either single or two spool service valves didn't have the power beyond cover on them. they had a cast plate on top that returned flow to sump controlled by the pilot valves in each valve body, be it one or more, but there was only room for two service valves under the fuel tank, but more could be added with fuel tank mods, and control linkage fabed to operate them. The valve bodies could also be rotated 180* so the ports were either on the RH or LH of the tractor.
The cover refered to would replace the G1232 pn. It may have been used on some 210Bs and in later years when DOM came out on 4-530s-70s it was used to operate the rear mounted draft control 3pt valve mounted under the right side of the seat. This PB cover is not present on the 440 in question.
Do you have a working knowledge of this system, or are you just theroizing??
Loren

I guess it really doesn't matter. The poster seems to be happy with what he has, and it works for him.

Case 440 front end loader attached, not working

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