Great Plains NP3000A Operator Manual - Manual (Page 90)

86 NP3000 and NP3000A Table of Contents Index Great Plains Manufacturing, Inc.
407-613M Table of Contents Index 2014-04-22
Refer to Figure 53, Figure 54, Figure 55
1.
In field conditions, unfold (page 51), lower implement
(page 48), and set or check coulter depth (page 83).
2. Pull forward to put coulters in ground.
3. Put tractor in Park and set parking brake.
4. Close the lift-assist valve .
5. Release the bypass valve lock disc . Turn the
bypass valve knob fully clockwise to shut-off all
bypass oil flow. Tighten lock disc.
6. Set tractor to half throttle. Adjust tractor flow control
valve so that wings fold/unfold at a reasonable
speed. Keep tractor running for step 7 through
step 10.
Note: On 2-point implements, fold and unfold are followed
by lift and lower operations.
7. Set tractor remote circuit for unfold. Lock lever for
continuous operation.
8. At the pressure reducing valve , release the lock
disc .
9. Adjust the knob for an initial value of 800 psi on
the gauge . Tighten the lock disc.
10. At the bypass valve , release the lock disc .
Adjust the bypass valve knob counter-clockwise until
the pressure reading just begins to fall from the value
set at step 9. Turn the knob clockwise
1 ⁄
4
turn.
Tighten the lock disc.
11. Observe implement operation, and re-adjust
down-pressure as necessary after oil warm-up.
Repeat step 7 through step 10. The bypass valve
needs to be closed prior to any adjustment to
increase weight transfer.
Figure 55
Weight Transfer Adjustment
32041
1
2
6
5 4
7
8
3
3
4
5
1
6
7
8
2 4