Slow moving front loader

[Nickelpickel]

My 2yr old Kubota L3901 intermittently has very slow raising of loader arms. It’s warmed up it’s set on pto speed rpms yet still is raising loader arms very slowly.

 

[Dave M7040]

My 2yr old Kubota L3901 intermittently has very slow raising of loader arms. It’s warmed up it’s set on pto speed rpms yet still is raising loader arms very slowly.

Check you do not have a rear remote control valve that has not returned to neutral. These valves can be draining off the hydraulic pressure making the FEL work slowly.
Dave m7040

 

[Citydude]

Next time it happens, lower the 3PH. See if that makes a difference. I had an L2501 that if the 3point hitch was fully raised, it would go into bypass. It was intermittent as well.

 

[LD1]

Any resolution?

What was mentioned above has happened on a few kubotas I have owned and worked on. Its a slight mis-adjustment of the feedback linkage for the 3PH.

Your 3PH lever is raised all the way up, as in physically out of travel.....but the feedback rod is still telling it to pump oil to the cylinder cause it dont think its quite all the way up yet. Kinda like dumping your loader bucket all the way...and then holding the lever to try and make it dump more even though it cant. This robs hydraulic flow and slows everything down.

Another thing to try I didnt see mentioned yet is try disconnecting and reconnecting all the loader quick couplers. Sometimes one can become partially unseated and cause some strange things to happen when using the loader