GREAT PLAINS 1510HDP, Руководство оператора

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1525P and 1510HDP Table of Contents Index Adjustments
Great Plains | 118-949M | 2018-07-03 Table of Contents Index 73
25P Series Down-Pressure
Refer to Figure 103 and Figure 104
Row unit springs provide the primary down pressure
necessary for row unit disks to open a seed trench. The
weight of the row units themselves contributes about
145 pounds (66 kg) of the total force.
The springs allow the row units to float down into
depressions and up over obstructions. Springs also
provide down force on coulters when using optional row
mounted coulters, and provide the primary down force on
row cleaners (optional), seed firmers (optional) and
press wheels.
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 30 inch or 70 cm
rows.
Refer to Figure 105
Use only enough down pressure to cut the seed trench
and maintain proper soil-firming over seed. Excessive
row unit down force will lead to premature wear on row
unit components, uneven seed depth and gauge wheel
slippage.
Refer to Figure 104 (shown at cam setting 1),
Refer to Figure 105 and Figure 106
To adjust down pressure, use a 1
1

8
inch (29 mm) open
end wrench or the tool 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. 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.
Cam Notch Pounds Kilograms
zero (out of notch) Maintenance Only
one 345 156
two 370 168
three 400 181
four 450 204
five 500 228
six 550 249
tip Do Not Use
Figure 103:
25 Series:Row Unit Springs
25118
2
1
1
Figure 104
25 Series Row Unit
Spring Adjustment
25268
2
3
5
4
6
2
Figure 105
Row Unit Minimum Cam (1)
27065
3
4