After I replaced the unit's
models setting from
Oil_Pump to
Fuel_Depot, the sound was gone at last.
Unfortunately, the map still had plenty Radar Stations with another grinding sound that is now audible instead...
It wouldn't be so annoying if such sound belong to
Weather & Ambient Sounds option to rather turn off than all together with
Sound Volume.
I'd still gladly see them being removed from the models completely, pretty please!
Excerpt of my last wishes before the game goes under.