Great Plains YP2425A Operator Manual - Manual (Page 110)

106 YP2425A Table of Contents Index Great Plains Manufacturing, Inc.
401-626M Table of Contents Index 2014-02-10
Erratic gage wheel behavior, such as wandering back
and forth in the field, or failing to rotate fully into place
while folding, are signs that the fold cylinders need to be
bled.
Fold Cylinder Bleeding
Refer to Figure 137
1.
Begin with planter raised and lift cylinder locks
installed.
2. Un-pin cylinder rod ends. Orient cylinders so that rod
ends may extend without striking planter parts.
3. Loosen the JIC fittings , at the base end of all
cylinders.
4. Extend the circuit until liquid (non-foamy) appears at
the loosened fittings and cylinders are fully
ex-tended. Set circuit to Neutral and secure fittings.
5. Loosen the JIC fittings , at the rod end of all fold
cylinders.
6. Retract the circuit until fluid appears at all fittings. Set
circuit to neutral and secure fittings.
7. Extend cylinders and re-pin cylinder rod ends.
Lift System Bleeding
Normally the lift hydraulics are bled at the factory before
shipping, and bleeding should not be required other than
to raise fully and hold lever on for one minute or until all
cylinders extend fully.
Lift Cylinder Bleeding
Refer to Figure 136
1.
Unfold and lower planter.
2. Un-pin rod ends of all lift cylinders. Position cylinders
so that rod ends may extend without striking
machine parts.
3. Loosen the JIC fittings at the base end of each
master lift cylinder.
4. Extend the circuit until fluid appears at the loosened
fittings. Set circuit to Neutral and secure fittings.
5. Loosen the JIC fittings at the base end of each
slave lift cylinder.
6. Extend the circuit until fluid appears at the loosened
fittings. Set circuit to Neutral and secure fittings.
7. Re-pin rod ends.
Figure 136
Lift Bleed
25227
1
2
1
2
1 2
3 4
Figure 137
Fold Bleed 29577
3
1
2
4
1
3
2
4
1
2