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NP30A or NP40A
Applicator Operating Instructions
49
2019-03-11
407-502M
2013+ NP40A 2-Point Fold/Lift Circuit
On 2-point 5-section NP40A applicators made in 2013 or
later, the fold and lift cylinders share a single hydraulic
circuit. Solenoid valves (controlled by a switch box), one
or more passive valves, and mechanical locks control
hydraulic sequencing.
This system design provides a partial fold, as a single
self-limiting hydraulic operation, during field lift, providing
extra wing clearance in field turns.
If the hydraulic harness is not connected at the hitch, or
the switch box is off, or power is off, most valves default
to an Open state.
FOLD / FIELD Switch
Refer to Figure 31 (depicting the switch in PARK)
This switch is mounted in the tractor cab (page 157), and
connected to the applicator at the hitch. It controls
several solenoid valves on the applicator. It has three
toggle positions and two indicator lamps.
Note: The switch is powered by the tractor. An illuminated
lamp indicates power sent to the harness. The
harness must be connected at the hitch for the
function to be effected.
Switch Positions
PARK
All solenoid valves are powered off and are
spring-loaded to flow-open positions.
Use this position only for parking, to save tractor
battery power. With the switch in PARK, any
hydraulic flow to the fold/lift circuit may have
undesired results.
FOLD
UNFOLD
Full fold and unfold sequence is controlled.
Down-pressure is disabled.
During unfold, the inner wings unfold before the
outer wings. During fold, the outer wings fold before
the inner wings. Fold range from fully folded to
wings level (excepting down-pressure) is available.
FIELD
Outer wings locked.
Inner wing fold restricted to “gull wing”.
Down-pressure available.
Use this position in the field. It engages the
down-pressure circuit for weight transfer.
It provides a partial fold for extra wing clearance in
field turns.
Figure 31
FOLD / FIELD Switch
34918
Machine Damage Risks:
Lift/lower (except field lift) and fold/unfold operations are
possible with the hydraulic harness off, but care must be
exercised. It is possible to lower below level, which can result
in row unit ground strikes and dragging.