Relief valves dripping

[daewoo 220lc-iii]

Hello 3rd time posting with no replies, got a excavator that drips hydraulic oil from all relief valves and seeping from a few oring locations on control valve, rear pump and swing motor, orings replaced still leaking 1gal/hr. Machine runs great just leaks bad.
What would cause the relief valves to drip oil from the adjuster screw/nut on the end?
Have been notified someone has messed with settings on pump/regular/proportional solenoid. Could this be overpressure issue?
Included pics of reliefs, leaking swing motor, pump regulator and solenoid that were changed and put back to original position

 

[Dave Neubert]

they need resealed

 

[uffex]

Good day
That side of the relief valve is hooked to return to tank, if the leak is only one valve I would suspect some disturbance, if a number of the valves leak check the tank line pressure.
Kind regards
Uffex