Marker unfolding, Marker unfold (one side) – Great Plains YP3025 Operator Manual User Manual
Page 48
44
YP3010HDP/3020P/3025
Great Plains Manufacturing, Inc.
401-703M
2013-09-09
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 YP30 planter has markers, unfolding of the mark-
ers 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 36.
Before operating markers, ensure cylinders are properly
bled. See “Bleeding Hydraulics” on page 90.
This section presumes correct marker length for your
pass spacing. If this has not been set, or needs to be
changed, see “Marker Extension” on page 167
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 165.
Marker Unfold (one side)
Refer to Figure 44 and Figure 45 (depicting identical opera-
tion on model YP40)
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 com-
pletely 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.
Figure 43
CFM: Marker Operation
26119
1
Overhead Hazard:
To prevent serious injury or death, do not allow anyone to
stand near or beyond the end of the wings during marker oper-
ations. Marker arms are heavy and marker discs may be
sharp.
Figure 44
Marker Unfolding
29285
1
Figure 45
One Marker Unfolded
29286