1525P and 1510HDP
Adjustments
Great Plains
| 118-949M | 2018-07-03
71
Row Unit Down Pressure
10HDP Series Down-Pressure
An adjuster cam sets row unit spring down pressure
individually for each row unit. This is useful for
penetrating hard soil and planting in tire tracks.
The notes in the left table below are based on a drill
without coulters. About 120 pounds (54 kg) of the
down-force is the weight of the row unit itself. The
additional force is due to the springs lifting against the
mass of the drill.
Test, without seeding, in your conditions, to determine
optimal down-force settings.
To adjust down pressure, use an adjustable or open-end
1
1
8
inch (29 mm) wrench.
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 wrench on hex nut weldment.
4.
Pull upper spring link back.
5.
Move the adjustment cam to the new setting on the
spring adjust bar.
2-Spring 10HD Cam Down-Force Settings
These settings apply to 2009+ drills, or updated older
drills, that have two parallel arm springs per row.
4-Spring 10HD Cam Down-Force Settings
These settings apply to older drills, not yet updated
a
, that
have four parallel arm springs per row.
With 4-spring rows, do not set all rows so high that
planting becomes uneven or gauge wheels lift off
ground.
Figure 100: 10HDP:
Row Unit Minimum (one)
and Maximum (six)
27065
1
6
Cam Notch
Pound
s
Kilo
g
ram
s
zero (o
u
t of notch)
Lock-Up & M
a
inten
a
nce
one
125
55
two
140
60
three
155
70
fo
u
r
1
8
5
8
5
five
215
100
s
ix
245
110
tip
Do Not U
s
e
3
6026
a. Contac your Great Plains dealer for update kit information.
Cam Notch
Pound
s
Kilo
g
ram
s
zero (o
u
t of notch)
Lock-Up & M
a
inten
a
nce
one
250
115
two
275
125
three
3
10
140
fo
u
r
3
70
170
five
4
3
0
195
s
ix
490
220
tip
Do Not U
s
e
3
1452
