3rd function valve overheating not functioning properly

DilworthTractorService

New member

Equipment
Kubota L3560, Kubota L3240
Jul 10, 2022
1
0
1
charlie1!!
Hi
I hit a stump and ripped off my 2 hydraulic lines feeding the 3rd function valve coming off the power beyond. After replacing the lines the grapple claw didn’t work properly. I swapped the lines and it worked but was overheating. I swapped the lines back and the claw function was reverse of normal, bleeding down quickly, and still overheating. I swapped the lines back yet again and the claw functions properly yet the claw still bleeds down and hydraulic unit is super hot. I can only assume I have the lines hooked up correctly at this point. Fluid level is just a little over full. What would be causing this over heating issue? Thank you for any help!
 

Attachments

Last edited:

johndeerebones

Member

Equipment
B7200 HST-D RC-60-72, L4200 GST MFWD with FEL
Aug 17, 2020
106
14
18
USA
It has to be open center meaning hydraulic flow has to be complete at all times. Whether it's through use or while not using. If it's pushing hydraulic pressure over the relief valve it will heat the oil. If you raise or lower the loader to its stopping point and keep holding it does the same thing. Engine note changes. OR if you turn the key off while running the engine should "coast" to a stop. If the hydraulics are under load it will stop with no "coast".