490e John Deere excavator Hydraulic problem? Starts and runs fine with plenty of power, After 25-30 minutes hydraulic starts boging, and shutting motor down, will rev back up when you let off control, been told it could be a hydraulic relief valve, any info helpful?? Thanks
Welcome to HEF southern ! A machine serial number would be a good place to start. You sure after 30 minutes it is still not an engine issue? Restriction in the fuel system? Fuel pressure good? Boost pressure good?