Great Plains 3P600 Operator Manual - Manual (Page 22)

Table of Contents Index 2011-10-21
18 3P500, 3P500V & 3P600 Table of Contents Index Great Plains Manufacturing, Inc.
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)
• Opener down-pressure (spring)
• 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
gauge wheel. Independent mechanisms control the rate
for each box. Changing one box rate does not affect the
other.
Details of rate setting are in the 118-794B Seed Rate
Manual
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)
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 118-794B.
Coarse seed rate
Rate Adjustment Handle SRM
a
Fine seed rate
Seed Cup Doors SRM
a
Consistent seed metering
Small Seeds Rate SRM
a
Fine seed rate
3-Point Height 19 Compensate for unusual opener depths
Frame Level 12 Consistent seed depth
00 Series Row Unit Adjustments 20
Opener Springs 21 Consistent seed depths in challenging conditions
Disc Blade Adjustments 22 Compensate for disc wear
Disc Scraper Adjustment 29 Consistent seeding depth
Opener Depth (Press Wheel Height) 25 Primary control of seed depth
Press Wheel Selection 36 Furrow coverage behind seeding