Lift-assist valve setup – Great Plains NP3000A Operator Manual User Manual
Page 165
Great Plains Manufacturing, Inc.
Appendix B - Initial Setup
161
2014-04-22
407-613M
Lift-Assist Valve Setup
This adjustment establishes fold priority in the combined
lift-fold hydraulic system.
1.
The implement is presumed to be unfolded.
Hitch the implement to a tractor.
Raise the implement (as for parking).
2.
Open the lift-assist shut-off valve
weight transfer valve assembly).
3.
Locate the one-way restrictor valve
at the tee that
supplies the rear cylinder base ends.
4.
Turn the knob fully counterclockwise, then clockwise
one turn.
5.
Start a lift/fold operation. Initially, the lift occurs
before the fold. Stop. Lower.
6.
Turn the valve clockwise one turn.
7.
Start a lift/fold. Stop. Lower.
If the lift occurred before the fold, repeat step 6.
If the fold occurred before the lift, back the valve off
(counterclockwise) a partial turn, and re-test lift/fold.
8.
Find the point at which the wings fold to the wing
locks prior to lift commencing.
Figure 83
Lift-Assist Valves
31944
2
1
1
2