Seed Hawk 30 SERIES: 600C & 800C 2013 - Manual (Page 106)

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.
5.11.1 LOWERING WING CYLINDERS & MARKER ARM CYLINDERS
Bleeding of the wing cylinders and marker arm cylinders is done by operating them to their
fully extended and fully retracted positions several times.
NOTE: Do not stand in the areas where the wing sections and marker arms are lowered while
bleeding is being performed.
5.11.2 OPENER SHANK CYLINDERS
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 circuit has hydraulic pressure applied.
When all the air has been bled out of the system the coupling is tightened again.
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