Great Plains YP625PD Operator Manual - Manual (Page 54)

50 YP625PD Table of Contents Index Great Plains Manufacturing, Inc.
401-754M Table of Contents Index 02/23/2011
An adjuster cam sets down pressure individually for
each row unit. This is useful for penetrating hard soil and
planting in tire tracks. For best results always adjust
tractor tires so they are not ahead of 110 cm rows.
Refer to Figure 48
Use only enough down pressure to cut the seed trench
and maintain proper soil-firming over seed. With a full
seed load, the force on each row is up to 54 kg higher at
start of planting.
Excessive row unit spring force causes premature wear
on row unit components and uneven seed depth. If all
rows are set to cam 6, some lighter planter
configurations could be lifted out of ground contact.
Refer to Figure 47 (shown at cam setting 2),
Figure 48 and Figure 49
To adjust down pressure, use a 29 mm open end wrench
or the tool
stored at the left end of the planter.
1. Raise the planter. Although this adjustment can be
made with the planter lowered, the springs will be in
tension, and will require more effort. The extra force
required may also damage tools.
2. Install lift cylinder locks.
3. Put tractor in Park and shut it off.
4. Position wrench on the fixed nut near or slightly
forward of vertical.
5. Pull upper spring link back.
6. Move the adjustment cam to the new setting on
the spring adjust bar .
Note: Do not set all rows higher than notch four. Using
high settings across all rows causes uneven
planting. Individual rows may be set higher if
running in tire tracks.
Null4:
Figure 47
25AP Series Row Unit
Spring Adjustment
31034
3
5
2
2
Cam Notch Pounds Kilograms
zero (out of notch) Lock-Up & Maintenance
one 255 115
two 265 120
three 285 130
four 315 145
five 345 155
six 375 170
tip Do Not Use
Values are down force with hoppers empty 31947
Figure 48
Row Unit Minimum Cam (at 1)
27065
4
6
3
Figure 49
Row Unit Maximum Cam (at 6)
27065
4
5
2
6