Great Plains NP3000A Predelivery Manual - Manual (Page 19)

Great Plains Manufacturing, Inc. Table of Contents Index Prepare Hydraulics 15
03/31/2011 Table of Contents Index 407-613Q
NP3000 2-Point Hydraulics
2-point implements have a combined lift and fold system,
with weight transfer controls. The lift and fold circuits
operate in opposite directions.
NP3000: Charge 2P Lift / Fold System
Refer to Figure 22
1.
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 during
extension.
2. 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.
3. Slightly loosen (crack) the JIC fittings at the base
end of the lift cylinders (two places).
4. Slowly extend cylinders. As oil appears at a cracked
fitting, set the circuit to Neutral and secure the fitting.
5. When the last lift fitting has been secured, operate
circuit to fully extend the fold cylinders.
6. Slightly loosen (crack) the JIC fittings at the base
end of the lift cylinders (four places).
7. Slowly extend cylinders. As oil appears at a cracked
fitting, set the circuit to Neutral and secure the fitting.
8. When the last lift fitting has been secured, operate
circuit to position lift-assist rods for re-attachment.
9. If this implement is:
• unfolded, or
• 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 16.
Figure 22
NP3000 2-Point Lift/Fold
31578
1
1
2
3
3
3
3
2
1
2
3