Great Plains 1525P Operator Manual - Manual (Page 31)

8/14/2006 118-949M
29 Adjustments
HD 10 Series Openers
Opener Down Pressure
Refer to Figure 24
IMPORTANT! Do not back up with openers in the ground. To
do so will cause severe damage and opener plugging.
Opener springs provide the down pressure necessary for
opener disks to open a seed trench. The springs allow the
openers to float down into depressions and up over
obstructions.
You can adjust down pressure individually for each opener.
This is useful for penetrating hard soil and planting in tire tracks.
Use only enough down pressure to cut the seed trench and
maintain proper soil-firming over seed. Excessive opener down
force will lead to premature wear of opener components. Ex-
cessive down force will also cause uneven seed depth.
Refer to Figure 25
To adjust down pressure, use adjustment wrench stored under
the walkboard or a 1 1/8” open end wrench. Position wrench on
the nut and pull down. Move the adjustment cam to the new
setting.
IMPORANT! Always adjust the Opener Down Pressure with
the drill raised and the openers in their completely lowered
position.
Opener spring
Figure 24
Opener Spring
21947
Figure 25
Opener Down Pressure Adjustment
21948