User guide

SEEDHAWK®30SERIESOPERATOR’SMANUAL106
5.11 BLEEDINGTHEHYDRAULICSYSTEM
Theseeddrillhydraulicsystemdoesnotneedtobebledduringdailyuse.Howeverthesystem
mustbebledafterithasbeenserviced,e.g.afterchangingseals.
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5.11.1 LOWERINGWINGCYLINDERS&MARKERARMCYLINDERS
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Bleeding of the wing cylinders and marker arm cylinders is done by operating them to their
fullyextendedandfullyretractedpositionsseveraltimes.
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NOTE:Donotstandintheareaswherethewingsectionsandmarkerarmsareloweredwhile
bleedingisbeingperformed.
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5.11.2 OPENERSHANKCYLINDERS
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If hydraulic servicing has been carried out on an opener shank cylinder, its hydraulic circuit
mustbebled.Thisisdonebycarefullyslackeningtheseeddrillunithydraulicconnectionthat
is furthest out in the circuit while the lifting/lowering circu it has hydraulic pr essure applied.
Whenalltheairhasbeenbledoutofthesystemthecouplingistightenedagain.
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NOTE:Warningofpiercingoiljet.Ifthereisairintheseeddrillunit'shydrauliccircuit,thiswill
affecttheoperationoftheentiremachine!
FIGURE5.13 