Hydraulics partially not working at high RPM

[NYlumberman]

From your description I suspect the issue is in the valve. Because the “lift” works fine and the problem migrated to the trailer. Most of the advice on here is good, confirming pressure and flow at different points will eventually reveal the issue. My “start with the last thing you touched” troubleshooting philosophy would lead me toward the spool you changed or the “carry over sleeve” (power beyond to us)….maybe. I believe this has a positive displacement pump so the oil is going somwehere.

 

[Th french mechanic]

Hello
The hydraulic works better than before, when i increase the rpms the loader and the lift work a little faster than at idle. I think some of the stuff stuck on the filter might have gone off. Anyways, i ordered the pto's gasket and seal, to be sure that i won't create more leaks when checking the suction filter. You have to take of the pto shaft.
Bye