Great Plains NTA2007 Operator Manual - Manual (Page 94)

90 NTA607 or NTA2007 Table of Contents Index Great Plains Manufacturing, Inc.
166-372M Table of Contents Index 2012-01-05
Weight Transfer Adjustments
Weight Transfer Safety Information
Crushing 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. 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.
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.
Falling Hazard - Tires Not a Step:
Do not use tires as steps or platforms. At higher transfers,
cylinders can lift cart wheels sufficiently for them to spin.
Refer to Figure 69 on page 91
During field operations, the Fold cylinders distribute
centre section weight to the wings. The wings are much
lighter than the centre section, and some weight needs
to be transferred. The wing-transfer valve
controls the
amount of weight transferred.
The wing transfer valve needs an initial setting and
possible later adjustment. If insufficient weight is
transferred, the wings run higher than the centre section.
If excess weight is transferred, the centre runs higher.
The centre section lift lock and cart-transfer functions
share a hydraulic circuit. There needs to be some circuit
pressure for a pilot-operated check valve to switch
between functions. Also, at higher row unit down-forces,
there may be insufficient total implement weight. A pair of
cylinders between the cart and implement allow some of
the cart weight to be transferred to the implement. The
cart-transfer valve
controls the transfer.
The cart transfer valve may often be left at the nominal
100 psi value.
Material Rate Risk:
The cart transfer cylinders can un-weight the cart sufficiently
to cause ground drive slippage, and in extreme cases, actually
lift the cart wheels off the ground.
1
1
2