Great Plains 2525P Operator Manual - Manual (Page 34)

30 2020P/2025P and 2520P/2525P Great Plains Manufacturing, Inc.
118-231M 2013-05-10
Adjusting 20-Series Down-Force
Refer to Figure 25
An adjuster cam sets row unit spring down pres-
sure individually for each row unit. This is useful for pen-
etrating hard soil and planting in tire tracks. For best
results always adjust tractor tires so they are not ahead
of twin rows.
Refer to Figure 26 and Figure 29
To adjust down pressure, use the spring adjustment tool
(part 198-810H) stored under the walkboard.
1. Raise the drill. Although this adjustment can be
made with the drill lowered, the springs will be in
tension, and will require more effort. The extra force
required may also damage tools.
2. Put tractor in Park and shut it off.
3. Position tool in the hole .
4. Pull upper spring link back.
5. Move the adjustment cam to the new setting on
the spring adjust bar .
Note: Do not set all rows higher than notch two. Using
high settings across all rows causes uneven plant-
ing. Individual rows may be set higher if running in
tire tracks.
Cam Notch Pounds
zero (out of notch) Maintenance Only
one 100
two 165
three 225
tip Do Not Use
1
2
Figure 25
20 Series Row Unit Springs
18273
1 2
Figure 26
20 Series Row Unit
Spring Adjustment
18409
1
3
5
4
3
4
Figure 27
Row Unit Minimum & Maximum
12104
6
5
1
6