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Great Plains
| 401-647M | 2019-06-11
Table of Contents
Index
52
3PYPA
Table of Contents
Index
Operating Instructions
Marker Operation (Option)
Overhead, Crushing and Shearing Hazards:
Do not allow anyone to stand near or beyond the end of the
wings during marker operations. There is risk of serious injury
or death for anyone in the path of a marker. Marker arms are
heavy, are under tremendous hydraulic power, and may move
suddenly if the hydraulic system is damaged or needs bleeding.
Marker discs may be sharp.
The planter markers have two operations, which are only
performed when the wings are unfolded (page 36):
1.
Tilt
(forward/up and backward/down)
Markers are tilted up prior to marker unfold/fold.
Markers are left tilted up for field operations.
Markers are tilted down prior, to wing fold, for
transport and storage.
2.
Fold
(down/out and up/in)
Markers are unfolded for marking.
Markers are folded for turns and prior to alternate
side unfolding.
If markers are installed, but not required for the next field
operations, they may be left folded and tilted up or down.
CFM and Marker Switch Priority
Refer to Figure 60
The Wing Fold switch must be OFF during all marker
operations. When the Wing Fold switch is ON, marker
switches ( / ) are disabled.
The Tilt operation is performed before the unfold
operation. The Tilt switch must be OFF during marker
fold operations.
When the Marker Tilt switch is ON, the Marker Fold
switch is disabled.
Before Operating Markers
•
Make sure cylinders are properly bled. See “
Marker
Maintenance (Option)
” on page 119.
•
This section presumes correct marker extension for
your pass spacing. If this has not been set, or needs
to be changed, see “
Marker Extension
” on
page 170.
•
This section presumes a factory marker chain
configuration.
•
If your chain has been replaced, or stretched, adjust
the links to the correct slack length. See “
Marker
Chain Length Adjustment
” on page 119.
•
Markers are equipped with an automatic sequence
valve that controls which side activates, as well as
marker deployment speed. Marker folding speed is
adjusted via set screws on the sequence valve body.
Excessive folding speed may damage markers. Set
speed prior to first field operations. See “
Marker
Speed Adjustment
” on page 169.
Figure 59
Marker Tilted Down
29890
Marker Fold
Marker Tilt
FRAME
Wing Fold
Right
CLUTCH
Center
Left
MASTER
Figure 60
CFM: Switches for Markers
29891
1
2
3
3
1
2
1
1
2
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