Great Plains NP3000A Operator Manual - Manual (Page 55)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 51
2014-04-22 Table of Contents Index 407-613M
Unfolding and Folding
• Nutri-Pro ® implements have a merged lift/fold circuit.
The lift-assist cylinders usually require reconfiguring
just prior to unfold and fold. Wing locks require reset
prior to fold. See “Unfolding”, below.
Unfolding
The implement should only be unfolded in the field, or
fully supported by parking stands and lift-assist cylinder
transport locks.
Unfolding (At Field)
These instructions presume the implement has just
completed transport, is raised, and transport locks are
installed. It is being unfolded for field use.
1. Open the lift-assist shut-off valve (page 48).
2. Lower the lift-assist circuit. Leave the 2-point hitch
at raised.
Because the transport lock channels are in place,
the lowering is arrested, and the wings unfold.
After the wings pass vertical, lock channels swing
into contact with the cylinder rods.
3. Stop the unfold when the wings are approximately
level.
4. Raise the lift-assist circuit just enough to raise the lift
cylinders off the lock channels. before the lift occurs,
the wings fold up against the wing locks. Set circuit
to Neutral.
5. Remove the transport locks (page 50).
6. Install the spacers (page 43).
The implement is now raised in field configuration.
To lower for nurse tank connections, continue…
7. Lower the 2-point hitch.
8. Lower the lift-assist circuit. The wings continue to
unfold, and the lift cylinders lower onto the spacers.
The implement lowers to or into the ground.
9. Set the hitch and lift/fold circuits as follows
depending on the next operation required:
Nurse Tank Hitching:
Set the hitch and lift-assist circuits to Float.
Field Application (Weight Transfer Adjusted):
Set the hitch to depth control. Set the lift/fold circuit
to lower/unfold (active weight transfer).
Field Application (Weight Transfer NOT Adjusted):
Set the hitch and lift/fold circuit to lower/unfold per
“Weight Transfer Adjustment” on page 85.
Unfolding (Service)
To unfold, off field, for servicing, unfold with the center
section fully raised. Unless the wing gauge wheels have
been previously extended to maximum height, or extra
stands or supports are used, the wing end coulters will
reach the ground first. Take precautions if parking
surface damage is a concern.
10. Set lift/fold circuit to Float.
11. Raise the 2-Point hitch.
12. If transport locks are not yet installed, open the
lift-assist shut-off valve and perform a lift-assist raise
operation. Wing fold is supplied with oil, but being
folded, the wings do not move.
13. Set circuit to Neutral. Remove spacers (page 43).
Install lift-assist transport locks (page 50).
14. Deploy parking stands. Set them to desired or
maximum height.
15. Lower lift-assist circuit. Wings unfold first, then
lift-assist lowers onto lock channels.
16. As the wings near level, set circuit to Neutral. Close
the lift-assist shut-off valve.
17. Unless using blocks or stands, fully extend the
gauge wheels to maximum height.
18. Resume unfolding until gauge wheels are on ground.
19. Lower the 2-point hitch.
20. Set hitch and lift/fold circuits to Float.