Great Plains YP2425F-2470 Operator Manual - Manual (Page 94)

90 YP2425 & YP2425F Table of Contents Index Great Plains Manufacturing, Inc.
401-406M Table of Contents Index 2014-07-14
Bleeding Hydraulics
Bleeding Lift Hydraulics
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.
If it is necessary to further bleed lift system, see “Lift
Cylinder Bleeding” on page 90 below.
Bleeding Fold Cylinder Hydraulics
Normally the fold hydraulics are bled at the factory before
shipping, and bleeding should not be required other than
to fold fully and hold lever on for one minute or until all
cylinders reach the end of their stroke.
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.
If it is necessary to further bleed fold system, see “Fold
Cylinder Bleeding” on page 91.
Lift Cylinder Bleeding
Refer to Figure 119
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 119
Lift Bleed
25227
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Machine Damage Risk:
Do not fold or unfold without first raising planter completely.
Machine Damage Risk:
Bleed lines only at:
JIC (Joint Industry Conference, 37 ° flare) or
NPT (National Pipe Thread, tapered thread) fittings.
Never bleed at:
ORB (O-Ring Boss) or
QD (Quick Disconnect) fittings.
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