2019-03-11
407-502M
NP30A or NP40A
Adjustments
88
3-Section, Pull-Type, and 2012- 2-Point
Weight Transfer
For 2013+ 2-Point 5-Section weight transfer, see
page 90.
See important safety information on page 87.
Description of system
Note: See circuit diagrams in the Appendix starting on
Wing fold cylinders can extend, during field operation,
to push the wings down using mainframe/center weight.
Weight transfer is enabled by opening the weight-
transfer shut-off valve, and controlled by two adjustment
valves. The fold circuit is set to continuous flow (in unfold
mode) to maintain the active weight transfer.
The weight-transfer shut-off valve must be open for
weight transfer. When closed, it bypasses the reducing
valve for faster fold cylinder operation (and faster 2-point
lift-assist).
The pressure reducing valve controls the flow to the
cylinders.
The bypass valve returns excess oil to the tractor.
Adjust the weight transfer to achieve consistent coulter
depth, while keeping the wings level with the center
section. If insufficient weight is transferred, outside
(wing) coulters may run higher than center section. If too
much weight is transferred, center section may run high.
If adjusted when the tractor is cold, re-adjustment may
be required when the oil warms. Monitor the pressure
gauge during early field operations.
Figure 65
Weight Transfer Valves
32041
2
3
1
1
2
3