Great Plains 3N-4020 Operator Manual - Manual (Page 93)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 89
2013-10-29 Table of Contents Index 196-359M
20 Series Press Wheels
Attached to the rear of each row-unit is one of several
press wheel options.
To provide consistent seed firming, the press wheels are
free to move downward from their normal operating posi-
tion. This system maintains pressing action even if the
row-unit arm is lifted when the disks encounter obstruc-
tions.
Refer to Figure 137
Press wheels are attached to each row-unit body. The
press wheels close the seed trench and gently press soil
over seed.
An adjustable spring in the press wheel mechanism cre-
ates the down pressure needed to close the seed trench.
The amount of force needed will vary with field condi-
tions.
To adjust, move adjustment handle.
• For less down pressure, move handle forward toward
planter.
• For more down pressure, move handle back away
from planter.
Note: Increased press wheel spring force may require in-
creased row-unit down force to maintain depth.
Note: The factory setting on the press wheel is staggered
to achieve optimum residue flow.
Refer to Figure 138
To adjust press wheels between staggered to even,
remove
5 ⁄
8
in nut and inside lock washer . Remove
press wheel, keeping spacer , outside lock washer
and bolt with wheel. Move wheel to other mounting
hole and re-secure.
If one press wheel is running in the seed trench or the
wheels are not centered over the seed trench, adjust the
press wheels by adding or removing spacers
.
Figure 137: 20 Series:
Press Wheel Adjustment
21948
More Down
Pressure
Less Down
Pressure
Figure 138: 20F: 20 Series:
Press Wheel Stagger
27464
4
2
3
2
1 1 2
3 2
4
3