Great Plains NP4000 40-foot Operator Manual - Manual (Page 39)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 35
2012-03-28 Table of Contents Index 407-776M
Raising/Lowering Applicator
Operate the tractor hitch in “position” or “depth” control
mode, regardless of implement hitch type.
The implement may be raised and lowered while folded.
Raise For Transport (Folded)
These steps presume an implement parked or stored
folded, already raised, but on lift-assist locks and parking
stands.
1. Verify that lock channels are installed on the
lift-assist cylinders (page 31).
2. Raise the tractor 3-point hitch just enough to lift the
parking stand bases off the ground. Set the hitch
circuit to Neutral. Shut off the tractor.
3. Raise the parking stands (page 25).
Raise Pre-Folding (Unfolded)
These steps presume an implement parked or stored
unfolded, already raised, but on lift-assist locks at rear,
on extended gauge wheels at wing tips, and on parking
stands at hitch.
1. Verify that lock channels are installed on the
lift-assist cylinders (page 31), on inner wing fold
cylinders (page 31) and on outer wing fold cylinders
(page 31).
2. Retract the fold circuit until all wing sections are
stopped by lock channels (page 31). Set fold circuit
to Neutral.
3. Raise the tractor 3-point hitch enough to lift gauge
wheels, coulters, and the parking stand bases off the
ground. Set the hitch circuit to Neutral. Shut off the
tractor.
4. Raise the parking stands (page 25).
5. Start the tractor. Extend the fold circuit until the
wings are level, or until all wing lock channels are
free. Set fold circuit to Neutral. Shut off tractor.
6. Set inner wing lock channels for pre-fold (page 33).
Remove and store outer wing lock channels
(page 31).
Field Lift
These steps presume an unfolded implement in field
configuration (lift-assist locks out, spacers in, wing lock
channels in, coulters in ground).
1. Set the fold circuit to Retract. Wing sections fold
against the lock channels (see Figure 23 above).
2. Set the lift-assist circuit to Extend.
3. Raise the tractor 3-point hitch.
4. When partial fold and lifts are completed, set all
three circuits to Neutral for extended turns or field
moves.
With some experience this lift can be done with near
simultaneous circuit operation, and done while moving.
Gradual Crushing Hazard:
Do not rely on hydraulic pressure alone to keep the implement
raised. Use parking stands (page 25) and transport/lift locks
(page 31) when working around a raised implement. The
tractor hitch may settle. The bypass orifices in the implement
lift-assist re-phasing system cause it to slowly lower.
Equipment Damage Risk:
Do not fully fold or fully unfold while lowered. Perform
complete fold and unfold only when fully raised. When
lowered, the wing coulters near the wing pivots may be
damaged by bending or ground dragging.
Figure 23
Partial Fold to Lock Channels
32367