Marker unfolding, Marker unfold (one side) – Great Plains YP4025F-1670 Operator Manual User Manual
Page 44
40
YP4010HD/YP4025/F
Great Plains Manufacturing, Inc.
401-571M
2014-09-08
Marker Unfolding
Electrocution Hazard:
Beware of overhead electrical lines. If the markers contact
lines, the tractor, raised planter and any cart can become
“hot” with no indication. A person standing on the ground and
touching equipment can complete the circuit. Serious injury or
death is likely. At higher voltages electrocution can occur
without direct contact.
If your YP40 planter has markers, unfolding of the
markers is performed only after unfolding the wings.
The Marker/Aux valve on the left wing must be set to
“Marker”. See “Auxiliary Hydraulics” on page 52.
Before operating markers, make sure cylinders are
properly bled. See “Bleeding Hydraulics” on page 96.
This section presumes correct marker length for your
pass spacing. If this has not been set, or needs to be
changed, see “Set Marker Extension” on page 145.
Dual markers are equipped with an automatic sequence
valve that controls which side activates, as well as
marker deployment.
Folding speed of dual markers is adjusted via set
screws on the sequence valve body. Excessive folding
speed may damage markers. See “Dual Marker Speed
Adjustment” on page 172.
Marker Unfold (one side)
Refer to Figure 32 and Figure 33
1.
If the Auxiliary Hydraulic circuit has been used
recently, confirm that the manual Marker/Aux valve
on the left wing is set to “Marker”.
2.
On the DICKEY-john
®
Clutch Folding Module
(CFM), set “Marker/Fold” switch
to Marker (up).
The LED above the switch illuminates steadily for
normal operation.
3.
Move tractor hydraulic control (lever or switch) for
the marker circuit to Extend. Hold until marker is
completely unfolded. Do not leave tractor control in
detent.
4.
If the marker side operating is not the desired side,
let it unfold part way, and move the tractor’s circuit
control to “Retract”. When the marker is folded, move
the circuit control to Extend to activate the other side.
On the CFM, leave the “Marker/Fold” switch in “Marker”
during normal field operations.
Overhead Hazard:
To prevent serious injury or death, do not allow anyone to
stand near or beyond the end of the wings during marker
operations. Marker arms are heavy and marker discs may be
sharp.
Figure 31
CFM: Marker Operation
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1
Figure 32
Marker Unfolding
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1
Figure 33
One Marker Unfolded
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