Great Plains NP30A 30-foot Predelivery Manual - Manual (Page 16)

12 NP30 or NP40 Table of Contents Index Great Plains Manufacturing, Inc.
407-313Q Table of Contents Index 08/30/2011
2-Point Hydraulics
The 2-point implements have a combined lift and fold
system, with weight transfer controls. The lift and fold cir-
cuits operate in opposite directions.
Charge 2P Lift / Fold System
Refer to Figure 15
Note: On 40-foot models delivered cross-folded
(no transport rest), the rod ends of the fold cylin-
ders are disconnected for shipment.
21. Disconnect the rod ends of the lift and fold cylin-
ders (six rods).
Orient lift rods so that they are lower than the cylin-
der base ends.
Orient fold rods so that they are higher than cylinder
base ends.
Make sure no rods can strike implement parts dur-
ing extension.
22. Operate the circuit to fully retract the lift cylinders
(this causes the fold cylinders to extend). Set circuit
to Float.
Note: This may be a slow operation. There are flow
restricting orifice plates at each fold cylinder port.
23. Slightly loosen (crack) the JIC fittings at the base
end of the lift cylinders (two places).
24. Slowly extend cylinders. As oil appears at a cracked
fitting, set the circuit to Neutral and secure the fit-
ting.
25. When the last lift fitting has been secured, operate
circuit to fully extend the fold cylinders.
26. Slightly loosen (crack) the JIC fittings at the base
end of the lift cylinders (four places).
27. Slowly extend cylinders. As oil appears at a cracked
fitting, set the circuit to Neutral and secure the fit-
ting.
28. When the last lift fitting has been secured, operate
circuit to position lift-assist rods for re-attachment.
29. If this is:
• an unfolded implement, or
• a 30-foot implement folded to transport rest,
operate circuit to position wing rods for re-attach-
ment. Do not attempt, at this time, to connect rod
ends on cross-folded wings.
Continue at section “Install Components” on page 15.
Figure 15
2-Point Lift/Fold
31578
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