Great Plains NTA2007HD Operator Manual - Manual (Page 133)

Great Plains Manufacturing, Inc. Contents Index Maintenance and Lubrication 129
04/04/2011 Contents Index 166-283M
Leveling Implement
Refer to Figure 125
When fully raised, the opener tool bars of all three sec-
tions should be at the same height. This measurement is
most accurately made on a flat paved surface.
Implement operating height/level is controlled at several
points:
• Center frame tool bar height is controlled by spacers
on the lift cylinder rods. See page 81.
• Front-to-back level is automatic. User adjustment of
the lift link is not recommended. In the event of dis-
mount during maintenance or repair, factory link length
is 202.0cm (79
17 ⁄
32
in) center-to-center.
• Wing tip tool bar height is primarily controlled by
gauge wheel cylinders.
• Wing tilt is controlled by wing weight transfer. The
weight transfer adjustment necessary varies with field
conditions. See page 86.
Wing Leveling (Eyebolts)
Wing tip tool bar height is normally set by the wing lift cyl-
inders. These are re-phasing cylinders operating as
slaves to the center section (master) lift cylinders. The
master cylinder lowering limit is set by spacers.
If wing tip tool bar height is not the same as the center
section tool bar height, make these checks before con-
sidering any adjustment to the eyebolts:
1. Page 115: Is the lift system charged and bled?
If there is any air in the system, the wing heights may
not track the center height (or each other).
2. Page 115: Is the lift system re-phased? If the wing
cylinders are not tracking the center cylinders, per-
form a re-phase.
3. Page 147: Check tire inflation.
4. Page 86: Is weight transfer properly set for condi-
tions?. If the wing gauge wheels are off the ground
(or nearly so), there may be too little weight transfer.
If the center section is running high, and the wing
ends are low, there may be too much transfer.
Refer to Figure 126
5.
Check the current eyebolt setting. Prior to any
adjustment, make sure that it was at the factory-rec-
ommended setting. The distance
from the base of
the cylinder lug tube to the flat top of the eyebolt
lug is factory-set to:
5.7 cm (2.25 in)
To adjust the gauge wheel height:
6. Unfold the implement on flat ground. Fully raise the
implement.
7. Loosen the jam nut .
8. Set the gauge wheel height with the adjust nut .
Adjust until opener tool bar height at wing tip is the
same as center opener tool bar height.
9. Tighten the jam nut.
Note: If the left and right wing cylinders are not operating
identically, the problem is hydraulic, and not a
mechanical adjustment.
Null4:
Figure 125
Implement Lateral Level Check
31421
1
Null4:
Figure 126
Wing Gauge Wheel Eyebolt
31264
2
3
4
5
1
2
3
1
4
5