Great Plains NP30A 30-foot Predelivery Manual - Manual (Page 38)

34 NP30 or NP40 Table of Contents Index Great Plains Manufacturing, Inc.
407-313Q Table of Contents Index 08/30/2011
Lift-Assist Valve Setup
This applies to 2-Point implements only. If the implement
is 3-Point or Pull-Type, continue at “Pre-Delivery Close-
out” on page 36.
2-Point Lift-Assist Valve
172. The implement is presumed to be unfolded.
Hitch the implement to a tractor.
Raise the implement (as for parking).
173. Locate the one-way restrictor valve at the tee that
supplies the rear cylinder base ends.
174. Turn the knob fully counterclockwise, then clockwise
one turn.
175. Start a lift/fold operation. Initially, the lift occurs
before the fold. Stop. Lower.
176. Turn the valve clockwise one turn.
177. Start a lift/fold. Stop. Lower.
If the lift occurred before the fold, repeat step 176.
If the fold occurred before the lift, back the valve off
(counterclockwise) a partial turn, and re-test lift/fold.
178. Find the point at which the wings fold to the wing
locks prior to lift commencing.
Figure 47
Lift-Assist Valve
31612
1
1