Great Plains 606NT Operator Manual - Manual (Page 33)

2014-02-10 Table of Contents Index 151-061M
Great Plains Manufacturing, Inc. Table of Contents Index 29
Adjustments
To get full performance from your drill, you need an
understanding of all component operations, and many
provide adjustments for optimal field results. Some of
these have been covered earlier in this manual.
Even if your planting conditions rarely change, some
items need periodic adjustment due to normal wear.
Planting Depth
Setting nominal planting depth, and achieving it
consistently, is affected by multiple adjustable drill
functions. From greatest to least effect they are:
• Opener depth (press wheel height)
• Coulter depth
• Opener down-pressure (spring)
• Opener frame down-force (optional weights)
• Row unit down-pressure spring
• Opener (tool bar) height
• Disc blade adjustments (as discs wear)
Seed Rates
Seeds are applied by fluted feed meters driven by the left
end or center gauge wheel. Independent mechanisms
control the rate for each box. Changing one rate does not
affect the rate of other boxes.
Rate setting details are in Seed Rate manual 151-122B.
Main Box seed rate is controlled by adjustments for:
• Drive Type gearbox lever
• Rate handle at seed box (drill front)
• Feed Cup Door handle (one each seed tube)
Native Grass (Option) Seed rate is controlled by:
• Sprocket pairings at drill front
• Rate Reduction kit (if used)
Small Seeds (Option) rate is controlled by a Rate
Handle (drill rear).
Adjustment Page The Adjustment Affects
Main Seed Box Rate
Drive Type SRM
a
a. SRM: Seed Rate Manual: This adjustment is described in manual 151-122B.
Coarse seed rate
Rate Adjustment Handle SRM
a
Fine seed rate
Seed Cup Doors SRM
a
Consistent seed metering
Native Grass Rate
Sprocket Selection SRM
a
Fine seed rate
Seed Rate Reduction SRM
a
Coarse seed rate
Small Seeds Rate SRM
a
Fine seed rate
Frame Height 17 Compensate for unusual opener depths
Frame Level 17 Consistent seed depth
Frame Weight Adjustment 30 Consistent seed depths in challenging conditions
Coulter Depth 31 Furrow depth and consistent seed depth
Coulter Down-Force 32 Consistent furrow in challenging conditions
Drive Clutch Adjustment 32 Seeding only with openers in ground
05/06 Series Row Unit Adjustments 33
Opener Spring 34 Consistent seed depths in challenging conditions
Disc Blade Adjustments 35 Compensate for disc wear
Disc Scraper Adjustment 43 Consistent seeding depth
Opener Depth (Press Wheel Height) 38 Primary control of seed depth
Press Wheel Selection 57 Furrow coverage behind seeding
Drive Idler Adjustment (605NT or 606NT) 43 Consistent seed flow