NP30A or NP40A
Adjustments
89
2019-03-11
407-502M
Adjusting the Weight-Transfer
1. In field conditions, unfold (page 59), lower applicator
(page 50), and set or check application depth
(page 96).
2. Pull forward to put coulters in ground.
3. Put tractor in Park and set parking brake.
4. Open weight-transfer shut-off 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
Note: On 2-point applicators, 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 applicator 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 66
Weight Transfer Adjustment
32041
2
3
6
5
4
7
8
1
1
2
3