GREAT PLAINS 3N-4010HDA Посібник - Сторінка 5

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Frame height (#1) is measured from the bottom of the opener tool bar
(the largest of the tool bars), and is measured with the drill lowered in the
field position. The recommended height depends on your field
conditions, and whether unit-mounted coulters are installed.
For no-till conditions, a 26 in. height allows the opener parallel arms to run
parallel to the ground giving the opener maximum upward or downward
flotation. In loose or conventional planting conditions, a frame height above
26 in. helps keep the no-till spring forces from burying the openers.
Note: Setting the frame above the 26 in. limits the opener downward
flotation.
Note: Running with the frame below 26 in. limits opener upward flotation
and could cause opener damage especially at the center of the drill.
The hydraulic lift system includes an adjustable stop valve (see Step #5) to
fix the height of the opener frame when the drill is lowered. Make sure the
drill is level and the lift system bled and re-phased before adjusting the tool
bar height.