New loader valve not working properly

[jd4310man]

I took the machine to my local hydraulics shop and they seem to think that the problem is with the valve itself. All functions cause a strain on the pump except when the loader is raised. The valve has regen mode and when the loader goes into that mode is when it causes that strain. Also I have right angle fittings that come directly off the valve, that are smaller than what they should be. I think that they are 1/4" and the hose is 3/8". Could that cause the back pressure when the valve goes into regen mode? Also this valve has developed a leak from the one mounting hole. Could the valve be over pressurized enough to cause a fracture in the valve body? Even though the relief valve is working? The Valve is a Brand Loader valve and is at least 3 years old but was sold to me as new, so theirs no warranty on so im stuck with it. Im going to try to do a patch weld and hope it will buy me some time. My tractor is a Struck Magnatrac and I have added this valve along with the original one. There is no three point valve installed on machine.

 

[oldnslo]

Is the regen function for dumping the bucket or are you trying to raise the loader with regen?

 

[J_J]

Are you talking about a mono block valve with a crack in it?

If so, I can almost bet that someone deadheaded the valve OUT port or the PB port at some time.

If so, I don't think there is a fix for that.

Can you show a picture of the crack.

 

[jd4310man]

Its a very minute fracture and its right at the one mounting hole. This valve was unused for 3 years and more than likely its a lemon. Im going to order another valve as soon as they become available. This time it will have the manufactures warranty.

 

[jd4310man]

The biggest problem im having other than the loader valve leaking is when I use the valve, it puts a strain on the engine as I open the detentes to the loader. I took the valve apart and found no internal issues. I removed the check valves and it helped to eliminate strain on the down stroke of the loader but not the dump of the bucket. Im posting pics of the valve and its mount. I removed the power beyond plug and extra tank drain hose and that didn't do anything. I have to order a new valve, should I change to a higher gpm valve? I only plan on running 8gpm threw this thing. I also do not want or need a Regen valve. Is there a valve like this that is a plane jane single lever, two spool w float? Any recommendations as I lay out another $250-300 bucks?

 

[jd4310man]

Hear is the pics of the valve setup.

 

[J_J]

Here is a joystick loader valve.

If you don't want regen, don't push the lever to the far right.

2 SPOOL COMPACT 10 GPM JOYSTICK CONTROL VALVE

Two Spool Loader Valves LVT Series | Type 4-way, 4-pos. float LVT VALVE 2 SPL 220-132

What is the relief pressure, and is it working.

Are you sure all the hoses are connected correctly.

You need the PB adapter if there are valves downstream.

Did you install those valves?

I don't see but 6 hoses on the loader valve, so you are not using the PB port like you should.

I also don't see PB port on the remote valve either.

On the remote valve, are you using the one spool for a SA cyl?

 

[jd4310man]

J_J, I believe the system pressure is set at 2000 psi. I did have the PB adapter and extra hose attached, I was experimenting without the PB. The lower valve is what came with the machine. and the upper one is what I added. The lower valve goes strait to tank. I disconnected the upper joystick valve and hooked up the loader hoses to the old valve and the up and down are working properly, but the dump on the bucket is still giving me a problem. Also found out that the one bucket cylinder was causing a resistance. I replaced the seals in it and got a few of them backwards. I repowerd this machine with a Hatz air cooled diesel. I replaced the original two pump system with a bigger one pump system 1.78 cu in CESSNA 25502LSC HYD PUMP. I am using a prince adjustable flow divider 3/8" NPT 30 GPM ADJ PRIORITY DIVIDER VALVE RD537 to split the oil flow into two separate streams. Could running a larger single pump be causing me this problem? The up and down will work fine with the old valve. Im not sure yet but the one bucket cylinder may be the culprit.

 

[J_J]

How much flow is going to the priority circuit, and what does the priority circuit feed?

Did you swap the lift hose with the dump hose, and are the hoses connected correctly?

If using that pump, do you have 36 HP to run that pump at max?

It takes about 21 HP to run the pump at 1800 rpm

1.78 cu in displ/rev
3000 max RPM
Rated GPM at 2500 PSI:
21.3 @ Max RPM
12.5 @ 1800 RPM

 

[J_J]

Hear is the pics of the valve setup.

Looking at the upper valve, which hose is the hose from the pump/flow divider, the one with the blue stripe?

Which hose is the return hose from the upper valve?

The PB should be going to the lower valve IN port with the relief valve close by.

Here is the PB adapter for that valve.

BRAND POWER BEYOND KIT