Great Plains NTA3007HD Operator Manual - Manual (Page 95)

Adjustments 91
04/04/2011 166-207M
Adjusting Weight Transfer
Weight Transfer Safety Information
Crushing and High Pressure Fluid Hazards:
This adjustment requires working near the unfolded and low-
ered drill with the hydraulic system active. Assign two people
to this task, one in the tractor cab, ready to shut the tractor
down on hand signal from adjuster or any unplanned event.
High Pressure Fluid Hazard:
Escaping fluid under pressure can penetrate the skin causing
serious injury. Use a piece of paper or cardboard, NOT BODY
PARTS, to check for suspected leaks. Wear protective gloves
and safety glasses or goggles when working with hydraulic
systems. If an accident occurs, seek immediate medical atten-
tion from a physician familiar with this type of injury.
Crushing Hazard:
Keep body parts clear of wings and openers while adjusting.
Keep all bystanders well away. You will be seriously injured or
killed if you are caught between lowering openers and ground,
or raising openers and drill frame.
Falling Hazard - Tires Not a Step:
Do not use tires as steps or platforms. At higher transfers, cyl-
inders can lift main wheels sufficiently for them to spin.
Null4:
Refer to Figure 98
Two dedicated cylinders at the wing pivots can extend to
push the wings down using mainframe/center weight.
These cylinders are in the Lift circuit, and controlled by
an adjustment
/ in the down-pressure valve body.
In conventional till and light no-till conditions, no weight
transfer may be required. In more challenging conditions,
adjust the weight transfer to achieve consistent furrow
preparation, planting depth and furrow closing, while
keeping the wings level with the center section.
Observe all warnings, and take all precautions, as noted
on page 85.
6. Unfold (page 25) and lower drill (page 32). Put trac-
tor in Park and set parking brake.
7. Set bypass valve ( , page 88 and adjust down-pres-
sure ( , , page 86) before adjusting weight trans-
fer.
8. Lock hydraulic lever forward during field operation for
constant hydraulic flow to openers. See step 2 on
page 87 for details.
9. Release lock disk . Adjust knob clockwise to
increase weight transfer, and counterclockwise to
reduce weight transfer.
The recommended weight transfer pressure ranges for
drilling are:
10. Once pressure is set, secure knobs with lock
disks .
11. Observe drill operation, and re-adjust down-pressure
as necessary.
Null4:
Figure 98
Weight Transfer Adjustment
29422
W
C
T
B
k
r
t
T t
B
C W
Transfer 70 to 170 bar (1000 to 2400 psi)
r k
t
r