Hardi COMMANDER TWIN FORCE Instruction Book page 31

3 - Description
Open centre hydraulics
The open centre hydraulics block is necessary if the tractor uses open
centre hydraulics and/or load sensing. For adjustment see "Open centre
hydraulics (optional)" on page 44.
SafeTrack
On sprayers with SafeTrack steering this hydraulic block manages
hydraulic pressure for the steering functions.
AutoHeight UC5
On sprayers with AutoHeight this hydraulic block manages hydraulic
pressure for the automatic boom height control functions.
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