Great Plains 3N4010HDA Operator Manual - Manual (Page 25)

Great Plains Manufacturing, Inc. Table of Contents Index Preparation and Setup 21
2013-09-24 Table of Contents Index 196-444M
Marker Setup
If markers were ordered with the drill, they were
factory-installed. If they were ordered separately, install
them now, per the instructions included with the markers.
1. Review “Marker Operation” on page 29.
2. Bleed the marker circuit. See “Bleeding Marker
Hydraulics” on page 61.
3. If you know that your conditions require a specific
marker disk orientation, change it now. See “Marker
Disk Adjustment” on page 49.
4. Adjust marker speed. See “Marker Speed” on
page 62.
5. Set the initial marker extension, below.
6. Fold the markers.
Initial Marker Extension
Marker Extension is the distance from the centerline of
the outboard row unit on each side to the centerline of
the mark left in the ground by the marker.
The 3N-4010HDA is symmetrical, and the values are the
same on each side and independent of next pass
direction. On a dual-marker drill, set each side.
To change marker extension:
If this is not the first adjustment to marker length.
1. Position drill on level ground and lower to planting
position.
2. Fully extend a marker.
3. If you plan to change the marker blade angle or
invert the blade, make that adjustment now (see
page 49).
4. Pull forward several feet to leave a mark.
5. Sighting along a line parallel to a tool bar, measure
the distance from the outside row unit centerline
(opener discs or furrow) to the mark. If the distance
matches the suggested value above, no marker
extension adjustment is needed.
6. Loosen U-bolt nuts securing outer marker tube .
7. Slide the tube in or out to change extension. Secure
the nuts.
8. Pull forward and re-measure new mark. Return to
step 6 if further adjustment is needed.
Figure 13 - Marker Extension
for 7.5in (19.5cm) Rows
20361
253.25 in
643.3 cm
Figure 14
Marker Extension for
10in (25.4cm) Rows
20361
245.0 in
622.3 cm
Figure 15
Adjust Marker Extension
18878
1
2
1 2