Great Plains 3P1006NT Operator Manual - Manual (Page 41)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 37
2011-12-20 Table of Contents Index 151-144M
Opener Adjustments
Opener Down Pressure
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.
Refer to Figure 28
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 32) and frame weight adjustments
(page 34).
Re-check drill level (page 16) after adjusting row force.
Disc Scraper Adjustment
To keep opener discs turning freely, dirt scrapers are
mounted between discs to clean as the discs rotate. As
field conditions vary, scrapers may need to be adjusted.
In damp conditions, scrapers may need to be lowered. If
openers are not turning freely, scrapers may need to be
raised.
Refer to Figure 29
To adjust scrapers, loosen
3 ⁄
8
inch bolt and move
scraper as needed.
The standard scraper is shown. Optional spring-loaded
carbide scrapers are available (see page 60). They
require no adjustment.
“W” Clip Hole
Row Down Force Added
Pounds kg
Highest +60 +27
Middle +30 +14
Lowest Factory Setting
Maximum Pressure
12103
Minimum Pressure
12102
Figure 28
Opener Down Pressure Adjustment
“W”
“W”
Figure 29
Disc Scraper Adjustment
18647
1
1