feeding loader valve with remote valve

[MJPetersen]

I strongly believe that that the line just above the pressure line from the pump (T) is the feed from the pump and the line (N) is the PB returning from the loader valve. The floppy looking hose (whose letter designation is covered up) is the sump return line. Lines "R" and "L" are work ports and "D" and "U" are the other set of work ports. (Where did they come up with these letter designations? What language were they speaking?)

The "manifold" is an addition that re-directs the flow to the loader valve and returns it to the 3 pt, therefore, connecting the 2 ports with the loader valve out is the right thing to do. In fact is is the thing that you MUST do if you do not want to severely damage your pump or something else.

Hyd oil is not compressible and running it with the line to the loader valve plugged does not allow the oil to go anywhere and the pump will stop. If the pump stops and the engine does not then something must give. Usually that is the pump shaft, the key or splines on the shaft, or the pump housing. In your case I suspect that the splines or key is sheared already. It is slipping when you try to get any real pressure, but still has enough friction to give prodigious flow at low pressure. That is my first guess from a distance.

Maybe worth what it cost!

Mike

 

[case685]

Thanks Guys Although the loader would not work initially it did sort of work after a hyd oil & filter change. If I pushed the joystick up to the left or down to the right (not normal positions) the main arms would lift with what seemed to be plenty of strength. As a result I figured the pump was okay but maybe not. I think I will pull off the 3pt housing and give the 3pt valve a closer look. If thats not it then I guess I'll give the pump a closer look. Gerry