Great Plains NP3000A Predelivery Manual - Manual (Page 30)

26 NP3000 Table of Contents Index Great Plains Manufacturing, Inc.
407-613Q Table of Contents Index 03/31/2011
Lift-Assist Valve Setup
NP3000 Lift-Assist Valve
1. The implement is presumed to be unfolded.
Hitch the implement to a tractor.
Raise the implement (as for parking).
2. Locate the one-way restrictor valve at the tee that
supplies the rear cylinder base ends.
3. Turn the knob fully counterclockwise, then clockwise
one turn.
4. Start a lift/fold operation. Initially, the lift occurs
before the fold. Stop. Lower.
5. Turn the valve clockwise one turn.
6. Start a lift/fold. Stop. Lower.
If the lift occurred before the fold, repeat step 5.
If the fold occurred before the lift, back the valve off
(counterclockwise) a partial turn, and re-test lift/fold.
7. Find the point at which the wings fold to the wing
locks prior to lift commencing.
Install Lift Cylinder Locks
Falling Hazard:
Do not climb or stand on tires or wheels. Even at full extension
on level ground, tires may not be in firm ground contact. They
could spin without warning. A fall could result in serious
injury.
Refer to Figure 39
Transport locks are present on all wheel assemblies with
hydraulic cylinders. To install cylinder stops:
1. Fully raise implement. Set lift circuit to Neutral.
2. At each rear lift-assist cylinder, remove cotter pin and
lock pin. Remove lock channel
from storage
location .
Figure 38
Lift-Assist Valve
31612
1
1
3
1
ll
Figure 39
Rear Lift Cylinder Lock Channel
31619
1
3