Great Plains NTA2007HD Operator Manual - Manual (Page 89)

Great Plains Manufacturing, Inc. Contents Index Adjustments 85
04/04/2011 Contents Index 166-283M
Weight Transfer Adjustments
Weight Transfer Safety Information
Crushing 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.
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 atten-
tion 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, cyl-
inders can lift cart wheels sufficiently for them to spin.
Refer to Figure 70 on page 86
During field operations, the Fold cylinders distribute cen-
ter section weight to the wings. The wings are much
lighter than the center 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 trans-
ferred, the wings run higher than the center section. If
excess weight is transferred, the center runs higher.
The center section lift lock and cart-transfer functions
share a hydraulic circuit. There needs to be some pres-
sure in this circuit 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 imple-
ment. The cart-transfer valve
controls this weight
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