Great Plains NP4000 40-foot Operator Manual - Manual (Page 78)

407-776M Table of Contents Index 2012-03-28
74 NP4000 Table of Contents Index Great Plains Manufacturing, Inc.
Troubleshooting
General Implement Troubleshooting............................ 74
General Application Troubleshooting........................... 75
Ground Drive Pump Troubleshooting .......................... 76
Hydraulic Drive Pump Troubleshooting ....................... 77
General Implement Troubleshooting
Problem Cause Solution
Fold or unfold jerky or
imbalanced Air in lines Bleed fold circuit (page 83).
Lift jerky or imbalanced Air in lines Bleed lift circuit (page 82).
Lift-Assist casters
oscillating Caster stabilizer too lightly set Increase spring tension on caster
stabilizer piston (page 91).
Uneven application
depth Excessive field speed. Reduce field speed.
Coulters set too deep, lifting entire
implement Reduce coulter depth.
Rough application conditions. Rework the field.
Wings too
Shallow Insufficient weight transferred to
wings Increase weight transfer (page 56).
Center too
Shallow Excess weight transferred to wings Decrease weight transfer (page 56).
Outer wings folding in
field lift Outer wing lock channels not
installed Install outer wing lock channels
(page 31).
Outer wings not folding
before inner wings Outer wing lock channels still
installed Remove outer wing lock channels
(page 31).