Adjustments – Great Plains YP4425A Operator Manual User Manual
Page 60
401-805M
2012-02-23
56
YP4425A
Great Plains Manufacturing, Inc.
Adjustments
To get full performance from your YP4425A Planter, 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 of
these items need periodic adjustment due to normal
wear.
Adjustment
Page
The Adjustment Affects
Tongue Height
Correct draft load to tractor
Frame height
21
Planting depth consistency
Frame level
Planting consistency
Height Switch Adjustment
Correct off/on state of meter drive
Wing Leveling
Planting consistency
Clutch Lock-Up
Temporary operation with a failed clutch
Air System
Fan Speed
Optimal seed distribution
Meter Pressurization (values from SRM
a
)
Consistent seed flow and disc singulation
Planting Rate
SRM
Refer to Seed Rate manual
Marker Adjustments
Marker Extension
Intended swath spacing
Marker Chain Length Adjustment
54
Marker folding operation
Dual Marker Speed Adjustment
Reliable marker operation
Fertilizer Adjustments
Fertilizer Setup (option)
Seed germination and growth
Fertilizer Orifices (option)
-
Refer to YP4425A Planter Seed Rate manual
25AP Row Unit Adjustments
Opener Depth
Planting depth
Row Unit Down Pressure
Planting depth uniformity
Row Cleaner Adjustments (Option)
Row preparation
Coulter Adjustments (Option)
Seed depth uniformity
Opener Disc Adjustments
Seed depth, seed-to-soil contact
Side Depth Wheels
Seed depth, prevents plugging
Adjusting Gauge Wheel Scrapers
Consistent seed furrow depth
Seed Meter Setup and Adjustment
Consistent seed population
Seed Firmer Adjustments (Option)
Seed-soil contact
Press Wheel Adjustment
Effective soil coverage
Planting Rate
Refer to Seed Rate manual
Monitor Adjustments
PDC
b
Refer to Seed Monitor manual
a. SRM: Seed Rate Manual (401-627B)
b. PDC: DICKEY-john
®
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