Erratic Hydraulics

[Gary Sweat]

[/QUOTE]Have you played with the position of the 3pt lever such as up all the way, or down all the way, or left in the middle of travel, when using the FEL.

The flow meter with pressure gage will show the flow at any rpm, and the pressure .[/QUOTE]

I usually have the 3pt all the way up when using the loader. I have noticed on the gauge that if I don't back off the 3pt lever just a little the gauge shows around 850psi steady. If I back the lever off just a little when the 3pt is raised, the gauge drops to zero and stays there until the 3pt creeps down and then I see pressure building again on the gauge. I don't know if this is normal or an indication something is not right.

 

[wdchyd]

Gary, You summed it up....."It's never as simple as it seems" .....:laughing:

 

[J_J]

That 3pt pressure appears to be the relief pressure on the 3pt system, and if the 3pt lever is left up, then any pressure above that will bleed off to the tank. If that lever is up, that is putting back pressure back to the FEL valve and reducing the total pressure by half. I think I would boost that FEL relief pressure back to the spec, about 50 to 100 psi below the pump pressure.

Someone mentioned an unloader valve in the 3pt. You might check further on that also.

 

[wdchyd]

Look at that picture of the valve again, the PB sleeve and hose is connected to the straight through path through the valve. The return is using the top outlet

This is where I'm not seeing that.....The PB (plug shown) is inline with the center power core but the PB hose connection to 3ph is not (it's showing the return to tank inline with the power core)......

 

[J_J]

In this picture, I see the steel line attached to the PB sleeve, the return is the 90 degree fitting to the right. The side return port is not used. Both are using steel lines.

 

[J_J]

Maybe you did this, but did you measure the time to lift FEL arms to the max at idle and at max rpm? There should be some difference.

 

[J_J]

Cylinder Speed

Bore Size 2 inches
Rod Diameter 1 inches
Pump Flow 1 GPM

Extension Speed 1.2 inches per second
Retraction Speed 1.6 inches per se


Cylinder Speed

Bore Size 2 inches
Rod Diameter 1 inches
Pump Flow 4 GPM

Extension Speed 4.9 inches per second
Retraction Speed 6.5 inches per second

 

[Gary Sweat]

Maybe you did this, but did you measure the time to lift FEL arms to the max at idle and at max rpm? There should be some difference.

I've got to finish some welding on my box blade to make it match the quick hitch today and I will get the tractor out of the garage and fire it up. The box blade is on the floor behind the tractor right now and the fumes get a little bit much if I run the tractor in the garage. It's a little cold today to keep the doors open.

I will let you know what the times are.

 

[wdchyd]

?? Which are you referring to as PB sleeve.?? the upper left looks like an adapter fitting to me....

 

[Gary Sweat]

In this picture, I see the steel line attached to the PB sleeve, the return is the 90 degree fitting to the right. The side return port is not used. Both are using steel lines.

That is correct. The PB port comes straight out of the valve side and I used the top return port hole and plugged the side return port hole. The side hole would not clear the PB 90degree fitting.

This valve has an internal connection between the PB port and the tank return port unless you install the PB adapter (which it has). Then the connection between the two ports is sealed off.