Great Plains 606NT Operator Manual - Manual (Page 38)

34 3P605NT, 3P606NT, 605NT & 606NT Table of Contents Index Great Plains Manufacturing, Inc.
151-061M Table of Contents Index 2014-02-10
Opener Spring
Opener springs provide the down pressure necessary for
opener discs to open a seed trench. The springs allow
the openers to float down into depressions and up over
obstructions.
Each opener spring can be adjusted for down pressure.
This is useful when planting in tractor tire tracks.
If coulter depth is altered for a row, the spring
pre-compression needs to be changed to compensate
for the change in row unit operating height.
Refer to Figure 34 and Figure 35
To adjust the pressure, remove “W” clip at bottom of
spring. Place “W” clip in a higher hole in spring rod for
more pressure or in a lower hole for less pressure.
Use this adjustment only for a few rows, typically in tire
tracks.
Do not set row force higher on all rows. Instead use
coulter adjustments (page 31) and frame weight
adjustments (page 30).
Re-check drill level (page 17) after adjusting row force.
Figure 34
Minimum Force
12102
“W”
Figure 35
Maximum Force
12103
“W”