H1 - Slewing supply inlet element
H2 - Slewing control element
H3 - Equipment supply inlet element
H4 - Boom control element
H5 - Intermediate boom control element
H6 - Bucket control element
H7 - Dipper control element
H8 - “Additional functions” control element
H9 - Pressure limiter (calibration 225 bar)
H10 - Pressure limiter (calibration 400 bar)
H11 - Pressure limiter (calibration 420 bar)
H12 - Pressure limiter (calibration 180 bar)
H13 - Pressure limiter (calibration 280 bar)