GREAT PLAINS NTA3007HD, Operator'S Manual

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NTA907HD and NTA3007HD Table of Contents Index Adjustments
Great Plains | 166-207M | 02/26/2019 Table of Contents Index 85
When higher wing down-pressures are required, an
increase in weight transfer is generally also required.
Increasing wing down-pressure with insufficient wing
weight results in outside rows running shallow. In
extreme cases of imbalance between down-pressure and weight transfer, the wing gauge wheels could be
lifted off the ground.
Before adjusting down-pressure, observe the drill
operating in your field conditions. Check the following
table for indications of adjustment needed.
Observation Probable Cause Adjustment
Press wheels leaving light or no tracks Insufficient down-force Increase down-pressure
a
a. When adjusting wing down-pressure, re-check performance in field, and re-adjust weight transfer as needed.
Press wheels compressing soil too deeply Excess down-force Decrease down-pressure
a
Openers not level Remove sub-frame shims (p 94)
Openers disks running too deep, despite press
wheel setting (“bulldozing”)
Excess down-force Decrease down-pressure
a
Opener sub-frames continuously moving up and
down
Insufficient down-force Increase down-pressure
a
Wing end tilted up Insufficient weight transfer Increase weight transfer
b
b. When adjusting weight transfer, re-check performance in field, and re-adjust down-pressure as needed
Incorrect gauge wheel tires
Wing ends tilted down Excess weight transfer Decrease weight transfer
b
Incorrect gauge wheel tires
Wing gauge wheels leaving light or no tracks Insufficient weight transfer Decrease weight transfer
b