Maintenance
99
Bleeding the
hydraulic system
The hydraulic system for switching the knife groups of the OptiCut 23
HydroProtected is bled when:
•
the cylinders are replaced or
•
the OptiCut cutterbar is modified.
The outlet ports for the hydraulic system are located on the right-hand
side of the pick-up equipment. To do so, you need a hydraulic test ho-
se and a suitable flat catch pan for hydraulic oil.
Proceed as follows:
> Observe the safety instructions »Hydraulics«, page 100.
> Switch off the tractor's PTO shaft.
> Fit the hydraulic test hose to the outlet port of a knife group.
> Hang the end of the hydraulic test hose into a flat catch pan and
secure against unforeseen movements caused by a build-up of
pressure.
> Open both ball valves on the hydraulic manifold for the knife group
switching on the left-hand side of the implement.
> Switch the tractor on.
Switch on the AutoPlus-Pilotbox.
> Press the “ON/OFF” button.
> Press the “INFO” button...
> ...until the “Pick-up/Knives” symbol is displayed.
> Press the “GO” button...
> until the “Pick-up/Knives” symbol is selected on the display.
> Leave the lever on the tractor's control device in the position for
swivelling in the knife for approximately 5 seconds so that the air
can escape from the hydraulic system.
> Remove the hose.
> Check the oil level in the hydraulic tank.
Repeat the whole process for the other knife group.
N
OTE
You can procure a hydraulic test hose from your dealer.
Knife groups outlet ports
drive direction
Open
Open
Hydraulic mani-
fold
Ball valve
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