Great Plains NP3000A Predelivery Manual - Manual (Page 29)

03/31/2011 Table of Contents Index 407-613Q
Great Plains Manufacturing, Inc. Table of Contents Index 25
Final Setup
Set Rough Weight Transfer
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 atten-
tion from a physician familiar with this type of injury.
Refer to Figure 36 and Figure 37
1.
Close the lift-assist valve by turning the knob fully
clockwise.
2. Open the shut-off valve .
3. In field conditions, unfold and lower implement.
4. Put tractor in Park and set parking brake.
5. At the bypass valve , release the bypass valve lock
disc . Turn the bypass valve knob fully clockwise
to shut-off all bypass oil flow. Tighten lock disc.
6. Set tractor to half throttle. Adjust tractor flow control
valve so that wings fold/unfold at a reasonable
speed. Keep tractor running for step 7 through
step 10.
7. Set tractor remote circuit for unfold. Lock lever for
continuous operation.
8. At the pressure reducing valve , release the lock
disc .
9. Adjust the knob for 800 psi on the gauge .
Tighten the lock disc .
10. At the bypass valve , release the lock disc .
Adjust the bypass valve knob until the pressure
reading just begins to fall from 800 psi. Tighten the
lock disc.
Note: Fold and unfold are followed by lift and lower oper-
ations.
Figure 36
Weight Transfer
31944
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.
Falling Hazard - Tires Not a Step:
Do not use tires as steps or platforms. At some transfer set-
tings, cylinders can lift wheels sufficiently for them to spin.
9
6
3
8
9
8
3
1 5
Figure 37
Weight Transfer Valves
32041
6
7
2 1
5
3
4
8
6
2
7 4
2
3 1