Great Plains NP4000 40-foot Operator Manual - Manual (Page 42)

38 NP4000 Table of Contents Index Great Plains Manufacturing, Inc.
407-776M Table of Contents Index 2012-03-28
Unfolding (Parking, Storage, Service)
To unfold, off field, for parking, storage or servicing,
unfold with the center section fully raised.
1. Hitch to a suitable tractor (page 22).
2. Extend the lift-assist circuit to fully raise the
implement rear.
3. Raise the tractor 3-point hitch.
4. If lift-assist lock channels are not installed, set
circuits to Neutral. Shut off the tractor. Remove
spacers (page 26). Install lock channels (page 31).
Re-start the tractor.
5. Un-pin all four inner wing lock channels (page 32).
Swing the spring-plunger assemblies onto their
respective fold cylinder bodies (page 32).
6. Extend the fold circuit to unfold the wings.
7. Set all circuits to Neutral.
8. Install the outer wing lock channels (page 31)
9. Swing the spring-plunger assemblies outward onto
their lock channels (page 32).
10. Retract the lift circuit slightly to reset the stroke
control valve. Extend the circuit to set the wings
level.
11. Shut off the tractor.
12. Unless using blocks or stands under wings, fully
extend wing gauge wheels (page 55).
13. Deploy parking stands at desired or maximum
height.
14. Start the tractor. Retract lift circuit to lower lift
cylinders onto lock channels. Set lift circuit to Float.
15. Lower the 3-point hitch until the implement rests on
the parking stands at front.
16. Extend the fold circuit until the gauge wheels contact
the ground. Set the fold circuit to Float.
Notes about normal unfold:
• Inner wings unfold first. The outer wings are
constrained by the wing latches (page 34).
• Inner wing lock channels (page 32, not shown above),
if correctly preset, engage during inner wing unfold.
• Outer wings unfold last. The wing latches release just
before the inner wings are level.
Figure 25
Normal Unfold Sequence
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