Unfolding, continued – Great Plains YP2425A Operator Manual User Manual
Page 29
Great Plains Manufacturing, Inc.
Operating Instructions
25
2014-02-10
401-626M
Unfolding, Continued
…
7.
Raise tractor 3-point hitch or extend planter hydraulic
tongue until tongue wing locks
rise and
disengage.
Machine Damage Risk:
Raise hitch before unfolding. If hitch is not raised, wing locks
remain in transport hooks. Wings cannot unfold, and machine
damage is possible.
8.
Activate (normally Retract) tractor hydraulic circuit to
unfold wings.
Refer to Figure 22
9.
Operation is complete when to tongue lock engages.
Machine Damage Risk:
Do not operate planter when unfolded unless tongue lock is
engaged. When unlocked, the pull bar system experiences
excess loads. The openers may be damaged by not tracking
straight forward.
10. When fully unfolded, set Marker/Fold hydraulic circuit
to Neutral.
11. Disable lock valve solenoids by setting CFM
Marker/Fold switch to Marker.
Note: Set switch to “Marker” even if markers are not
installed.
12. For imminent lowered operations, remove lift cylinder
locks (see “Lift Cylinder Lock-Up” on page 30).
Refer to Figure 19
13. For operations across hillsides, engage caster locks.
Set wire handles to FIELD. Casters will lock into
straight trailing position during operation.
14. Set hitch height to planting position
(“Raising/Lowering Tongue” on page 18).
Machine Damage Risk:
Unfold and fold slowly. Adjust hydraulic flow to take a
minimum of 60 seconds to unfold or fold. Wings are massive,
and damage can occur if they reach the end of travel at high
speed. At lower speeds you also have time to check for hose
pinching or kinking, as well as react to anything unexpected in
the sweep arc.
Figure 20
Unfold: Wings Locked
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8
8
Figure 21
Planter Unfolding
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9
8
Figure 22
Tongue Lock Engaged
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