Great Plains NTA3007 Operator Manual - Manual (Page 111)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 107
2012-07-02 Table of Contents Index 166-371M
Adjusting Weight Transfer
Weight Transfer Safety Information
Crushing and High Pressure Fluid Hazards:
This adjustment requires working near the unfolded and
lowered 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
attention 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,
cylinders can lift main wheels sufficiently for them to spin.
Refer to Figure 106
Two dedicated cylinders at the wing pivots can extend to
push the wings down using mainframe/centre 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 centre section.
Observe all warnings, and take all precautions, as noted
on page 101.
6. Unfold (page 34) and lower drill (page 42). Put
tractor in Park and set tractor parking brake.
7. Set bypass valve ( , page 104 and adjust
down-pressure ( , , page 102) before adjusting
weight transfer.
8. Lock hydraulic lever forward during field operation for
constant hydraulic flow to openers. See step 2 on
page 103 for details.
9. Release lock disc . Adjust knob clockwise to
increase weight transfer, and counter-clockwise to
reduce weight transfer.
The recommended weight transfer pressure ranges for
drilling are:
10. Once pressure is set, secure knobs with lock
discs .
11. Observe drill operation, and re-adjust down-pressure
as necessary.
Figure 106
Weight Transfer Adjustment
29422
1
2
t
T
C
W
B
T t
B
C W
Transfer 70 to 170 bar (1000 to 2400 psi)
2 1
t
2