Great Plains NTA2007HD Operator Manual - Manual (Page 31)

Great Plains Manufacturing, Inc. Contents Index Preparation and Setup 27
04/04/2011 Contents Index 166-283M
Checking Air Drill Height
The air drill is designed to operate with all sections of the
main tool bar nominally:
65cm (25
1 ⁄
2
in) above the planting surface, at a
planting depth of:
3.8cm (1
1 ⁄
2
in), and a
coulter (option) depth of:
5.1cm (2in).
Refer to Figure 14
Tool bar height is measured to the bottom of the tool bars
on which the row units are mounted.
At the suggested default setting, the implement frame is
level with the ground during planting, and the row units
operate at their most consistent planting depth.
Your crop, soil conditions, disk wear and other factors
may create a need to use a different tool bar height.
Refer to Figure 15
Tool bar height is set via combinations of spacer bush-
ings on the rods of the master lift cylinders
ahead of
the implement center section, described on page 81. The
wing end tool bar heights are controlled by slave cylin-
ders that stop retracting when the master cylinders stop.
Only weight transfer adjustment is usually required for
wing height (although eyebolt adjustment is available).
When checking tool bar height:
1. Move the drill to representative planting soil condi-
tions.
2. Set hitch to planting height (page 26).
3. Unfold and lower the implement (page 30).
4. Pull forward a meter or so (a few feet) to put openers
in ground.
5. Check tool bar height across air drill.
6. If center section is not at desired height, see
“Adjusting Tool Bar Height” on page 81.
7. If wing tool bar heights do not match center section,
this usually means that wing weight transfer needs to
be set or adjusted. See see “Weight Transfer
Adjustments” on page 85 before considering an
eyebolt adjustment (page 129).
Marker Setup
Prior to first use, set or review marker extension and ten-
sion. See:
• “Marker Adjustments” on page 94.
Prior to each planting session, check and adjust:
• “Marker Disk Adjustment” on page 96.
MetaData: End of “Preparation and Setup”
Null4:
Measurement Error Risk:
Drill must be fully lowered to field position (with openers into
ground) and hitch height must be set before checking tool bar
height.
Figure 14
Tool Bar Height Check
31130
1
Null4:
Figure 15
Master Lift Cylinder Spacers
31226
1
1