Great Plains 3N-4025P Operator Manual - Manual (Page 118)

114 3N-40P Table of Contents Index Great Plains Manufacturing, Inc.
196-538M Table of Contents Index 2014-01-29
20P Series Press Wheel Adjustments
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
position. This system maintains pressing action even if
the row-unit arm is lifted when the disks encounter
obstructions.
Refer to Figure 160
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
creates the down pressure needed to close the seed
trench. The amount of force needed will vary with field
conditions.
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
increased 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 161
To adjust press wheels between staggered to even,
remove
3 ⁄
8
inch 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 160: 20 Series:
Press Wheel Adjustment
21948
More Down
Pressure
Less Down
Pressure
Figure 161: 20F: 20 Series:
Press Wheel Stagger
27464
4
2
3
2
1
1 2
3
2 4
3