Great Plains NTA3007HD Operator Manual - Manual (Page 133)

Maintenance and Lubrication 129
04/04/2011 166-207M
Tool Bar Heights
Tool bar heights must be checked and adjusted in repre-
sentative field conditions, with openers lowered to plant-
ing height, and pulled forward in the ground, as for
section alignment checking above. New drills are
shipped with the wing eyebolts not fully tightened. They
must be set before first planting.
9. Check that rows are fully lowered, running level, and
that center front and wing gauge wheels are not run-
ning light. Adjust down-pressure and weight transfer
as needed (page 85).
If rows are not running level, adjust sub-frame shims
as needed (page 90).
Refer to Figure 146 (shown with wings folded for clarity)
10. Check opener sub-frame tool bar height at the center
section. Measure from the average soil surface level
to the bottom of the rear opener tool bar.
The distance should be:
76.2cm (30in).
Refer to Figure 147
11. Check sub-frame tool bar height at the inside and
outside ends of the wing rear tool bar. If either end
differs from center height by more than about 6mm
(
1 ⁄
4
in), adjust the eyebolt above the parallel arms
at that end.
12. To adjust an eyebolt:
Back the upper jam nut up a few turns. Adjust the
lower nut . The adjustment is about 2.8mm
(0.11in) of opener height per turn of the adjuster nut.
Whether adjusted or not, secure the 1-8 jam nut to
torque spec (page 154).
13. Check and set all four (4) wing ends and eyebolts.
14. Pull forward and re-check height.
Null4:
Figure 146
Checking Tool Bar Height
29519
Null4:
Figure 147
Adjusting Wing Tool Bar Height
29520
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1
2
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