
Great Plains | 151-144U | 2019/03/14
22
3P1006NT
Operation
To adjust all coulter height:
1.
Determine the desired coulter depth. With new
coulter blades, the axle holes provide the
following depths:
2. Raise the drill until the spindle can be adjusted
any distance.
3. Loosen the chain idlers.
4. Remove the wheel bolts and move the spindle to
the desired hole. Reinstall the wheel bolts.
5. Engage the chain idlers and check the overall
depth.
Coulter Depth - Individual Rows
Adjusting the height of a small number of coulters
may be useful for rows in tire tracks.
Do not adjust the bar height of all coulters.
Use the tractor 3-point lift arms and front
gauge wheel to set group coulter height.
Adjust individual coulters as follows:
1.
Determine the new desired coulter depth, and/or
the difference between that and the current
depth.
2. On level ground, raise the drill until coulters just
touch the ground. The press wheels are
supporting some weight at this point.
3. Measure the current spring bar length from the
bottom of the tool bar to the bottom of the spring
bar. For reference, the factory setting is
approximately 31.8 mm.
4. Determine the new bar length required and
loosen the clamp bolts (1).
5. Using a rubber mallet, tap the spring bar (3) up or
down to reach the desired level.
6. Tighten the clamp bolts.
7.
Lower the drill and pull forward 10 m (30 feet).
8. Check the coulter blade to opener blade (furrow
centerline) alignment.
Coulter Down Pressure
The maximum down force at the coulters depends
on:
empty drill weight,
extra weights added,
down-force consumed by the opener disks
ranging from 22 kg to 68 kg, and
the current material loading (which declines to
zero during planting).
The drill configurations typically are too light to reach
the factory down-force of 181 kg at all rows. The table
below shows typical forces available. Do not increase
coulter spring forces drill-wide unless weight is
available.
Hole
Coulter Depth (mm)
1
89
2
73
3
60
4
48
5
35
6
22
7
10
8
6
2
3
4
6
8
7
18509
5
1
i
Drill Configuration
Empty
Drill
Drill with Full
Weight Kit
Standard Drill
79 kg
114 kg
Drill w/Fertilizer
89 kg
124 kg
Drill w/Native Grass
87 kg
123 kg
Drill w/Small Seed
81 kg
116 kg
Fertilizer and Small Seed
91 kg
126 kg
NG and Small Seed
97 kg
132 kg
1
10300
2