Additional functions (quick coupler,proportional rotation function (boom swing) etc. for several Hitachi excavators

Hydraulic functions for several Hitachi’s (2x ZX19, 1x ZX26 en 1x ZX85):

-Quick coupler system (ZX19U-6, ZX26U-5, ZX85USB-6)
-Proportional rotation function (boom swing) (ZX19U-6, ZX26USB-6)
-Expand existing rotation function with mowing bucket function (ZX85USB-6)
-To make the existing extra function in foot pedal operable in joystick (ZX85USB-6)