Weight transfer adjustment, Weight transfer safety information – Great Plains NP3000A Operator Manual User Manual
Page 89
Great Plains Manufacturing, Inc.
Adjustments
85
2014-04-22
407-613M
Weight Transfer Adjustment
Weight Transfer Safety Information
Crushing and High Pressure Fluid Hazards:
This adjustment requires working near the unfolded and
lowered implement with the hydraulic system active. Assign
two people to this task, one in the tractor, ready to shut 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, row cleaners and coulters
while adjusting. Keep all bystanders well away. You will be
seriously injured or killed if you are caught between lowering
row implements and ground.
Refer to Figure 53 and Figure 54
Wing fold cylinders can extend, during field operation,
to push the wings down using mainframe/center weight.
Weight transfer is controlled by two adjustment
valves (
and
). See circuit diagram on page 157.
The fold circuit is set to continuous flow (in unfold mode)
to maintain the active weight transfer.
The pressure reducing valve
controls the flow to the
cylinders.
The bypass valve
returns excess oil to the tractor.
Adjust the weight transfer to achieve consistent coulter
depth, while keeping the wings level with the center
section. If insufficient weight is transferred, outside
(wing) coulters may run higher than center section. If too
much weight is transferred, center section may run high.
If adjusted when the tractor is cold, re-adjustment may
be required when the oil warms. Monitor the pressure
gauge during early field operations.
Figure 53
3P Weight Transfer
31944
1
2
Falling Hazard - Tires Not a Step:
Do not use tires as steps or platforms. At some transfer
settings, cylinders can lift wheels sufficiently for them to spin.
Figure 54
Weight Transfer Valves
32041