Great Plains 3PYP Operator Manual - Manual (Page 109)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 105
2014-09-09 Table of Contents Index 401-312M
Bleeding Marker Fold Hydraulics
Refer to Figure 135 and Figure 136.
Normally the marker 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.
1. Consult complete tilt circuit hydraulic diagram for
your planter:
“Wing Fold with Markers (all s/n)” on page 128
(partially repeated here for reference)
2. Check that tractor hydraulic reservoir is full.
3. Unfold the wings. See “Unfolding The 3PYP” on
page 28 Turn the wing switch Off and leave it (and
the marker fold switch) Off during this bleed.
4. Leave the markers tilted down.
5. Disconnect rod ends of both marker fold cylinders.
6. Retract the marker fold circuit.
7. Loosen the JIC fittings at both marker fold cylinder
base ends
.
8. Set marker fold circuit to Extend until fluid emerges.
9. Neutralize the circuit and secure the fittings.
10. Extend the tilt rods.
11. Loosen the JIC fittings at both marker fold cylinder
rod ends .
12. Set tilt circuit to Retract until fluid emerges.
13. Neutralize the circuit and secure the fittings.
14. Re-attach the rod ends to the markers.
Figure 135
Marker Fold Cylinder Location
25420
1
Figure 136
Marker Fold Cylinders
25062
L
R
2
2
3
3
2
3
2