Seed Rate Application Charts for 2007+ 20ft and 25ft Precision Seeding SystemsThe following pages are to assist in the proper setting of seeding and fertilizer application rates for the 20ft and 25ft precision seeding systems. The rates indicated in the charts are approximate values. To assure the most accurate seeding rate it is recommended that the drill be calibrated for the desired seed at the time of planting.
Note: These seed rate charts cover all drill models and series openers for the 20ft and 25ft precision drills. If your drill is equipped with 25P series openers, singulating meters use a green wheel. If your drill is equipped with 20P series openers, singulating meters use a black wheel.
Rye, 58lbs/bu, Wheat Narrow Wheel..........................34Rye, 58lbs/bu, Wheat Wide Wheel .............................35Wheat, 64lbs/bu, Wheat Narrow Wheel......................36Wheat, 64lbs/bu Hard Red Winter, Wide Wheel.........37Wheat, 62lbs/bu Soft Red Winter, Wide Wheel ..........38Wheat, 62lbs/bu Soft Red Winter, V3 Wheel..............39
Finger Meter Charts ................................................... 40Reading a Finger Meter Rate Chart............................40Checking Finger Meter Rate.......................................41
Seed Rate Charts ........................................................... 41Finger Meter Adjustments...........................................42
Finger Meter Brush Adjustment ..............................42Finger Meter Inserts ...........................................43
30in Rows, 6 Finger Meter..........................................4430in Rows, 12 Finger Meter........................................4530in Twin Rows, 6 Finger Meter .................................4630in Twin Rows, 12 Finger Meter ...............................4736in Twin Rows, 6 Finger Meter .................................4836in Twin Rows, 12 Finger Meter ...............................4938in Rows, 6 Finger Meter..........................................5038in Rows, 12 Finger Meter........................................5138in Twin Rows, 6 Finger Meter .................................5238in Twin Rows, 12 Finger Meter ...............................5340in Rows, 6 Finger Meter..........................................5440in Rows, 12 Finger Meter........................................5540in Twin Rows, 6 Finger Meter .................................5640in Twin Rows, 12 Finger Meter ...............................57
Indexing Fine Adjustment ...........................................676-Finger Meter Stagger Adjustment........................6712-Finger Meter Stagger Adjustment......................68
Great Plains Manufacturing, Inc. provides this publication “as is” without warranty of any kind, either expressed or implied. While every precaution has beentaken in the preparation of this manual, Great Plains Manufacturing, Inc. assumes no responsibility for errors or omissions. Neither is any liability assumed fordamages resulting from the use of the information contained herein. Great Plains Manufacturing, Inc. reserves the right to revise and improve its products asit sees fit. This publication describes the state of this product at the time of its publication, and may not reflect the product in the future.
Trademarks of Great Plains Manufacturing, Inc. include: AccuShot, Max-Chisel, Row-Pro, Singulator Plus, Short Disk, Swath Command, Terra-Tine, Ultra-Chisel, and X-Press.
Registered Trademarks of Great Plains Manufacturing, Inc. include: Air-Pro, Clear-Shot, Discovator, Great Plains, Land Pride, MeterCone, Nutri-Pro, Seed-Lok, Solid Stand, Terra-Guard, Turbo-Chisel, Turbo-Chopper, Turbo-Max, Turbo-Till, Ultra-Till, Whirlfilter, and Yield-Pro.
Brand and Product Names that appear and are owned by others are trademarks of their respective owners.Printed in the United States of America
Cover
Blank.TOC:
Cover
Great Plains Manufacturing, Inc. Table of Contents 1
Introduction
This manual is your guide to drill adjustments for achiev-ing specific seed population targets. Although some setup/adjustment material herein is repeated from the Operator’s Manual, you need to be thoroughly familiar with drill operations and adjustments before applying this Seed Rate manual and its table data.
Products Covered2020P 20 Series 20ft Drill, 2007+2025P 25 Series 20ft Drill, 2007+2520P 20 Series 25ft Drill, 2007+2525P 25 Series 25ft Drill, 2007+
This manual relies on information found only in your Operator’s Manual. Have both available when preparing to plant.
Setting Planting RateThere are four to six steps to obtaining the desired num-ber of seeds per acre, some of which apply only certain meter types, and particular row unit configurations:
1. Know the characteristics of the seed
Consult your seed supplier’s reference documents.
2. Install the correct seed meters and wheels
Consult your Great Plains dealer and see “Seed Meter Setup and Adjustment” in the Operator’s Manual.
3. Adjust Finger Pickup meters for the seed
This only applies to finger pickup meters.See “Finger Meter Adjustments” on page 43
4. Sprocket index for staggered twin-row
On twin-row drills, with certain crops, get maximum benefit with precise seed spacing between adjacent rows. See “Sprocket Indexing (Stagger)” on page 59.
5. Set meter rate
Two sprocket sets are configured at each gauge wheel:
a. rangeb. transmission
See “Sprockets” on page 3.
6. Check planting rate
See “Checking Planting Rate” for each meter type.
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Seed Lubricants
Singulator Plus Meters (all seeds)
Ezee Glide Plus Talc-Graphite Mix
821-069C bucket, 5 gallon (19 liter)
Ezee Glide Plus LubricantTo maximize performance of Great Plains metering sys-tems, it is imperative to use only “Ezee Glide Plus” lubri-cant. Ezee Glide Plus” Talc-Graphite lubricant is mandatory for all seeds, especially treated or inoculated seed. Thorough mixing of seed and added lubricant is required.
Recommended usage:
For clean seeds other than milo and cotton sprinkleone cup of Ezee Glide Plus Talc per 4 bushels or units (170 ml per 100 liters) of seed.
For milo and cotton double the application toone cup (or more) per 2 bu or units (335 ml per 100 liters) of seed.
Adjust this rate as necessary so all seeds become coated while avoiding an accumulation of lubricant in the bottom of the hopper.
For seed with excessive treatment, or for humid planting environments, increase the rate as needed for smooth meter operation.
Irritation and Chronic Exposure Hazard:Wear gloves. DO NOT use hands or any part of your body to mix seed lubricant. Wear a respirator when transferring and mixing. Avoid breathing lubricant dust. Not an acute hazard. May cause mechanical eye or skin irritation in high concentra-tions. As with all mineral spills, minimize dusting during clean-up. Prolonged inhalation may cause lung injury. Prod-uct can become slippery when wet.
Finger Pickup Meters
EZ-Slide Graphite Powder
821-042Cbottle, 1 pound (450 grams)821-060Cjug, 5 pound (2.3 kg)
For Finger Pick Up Meters OnlyUse only approved Graphite Powder available from Great Plains Mfg. Inc. or Precision Planting to ensure proper lubrication of finger pickup corn seed meters.
Recommended usage:
For finger pickup meters, add one tablespoon (15 ml) of graphite for each unit of seed corn (80,000 kernels).
In high humidity conditions, or seeds with heavy seed treatments, increase the application to two tbsp (30ml).
If delivery of seed from the hopper to the finger meter is an issue, add “Ezee Glide Plus” talc and graphite blend at a rate of one cup (237ml) per 4 units of seed. Adjust until issue is resolved.
Irritation and Chronic Exposure Hazard:Wear gloves. DO NOT use hands or any part of your body to mix seed lubricant. Wear a respirator when transferring and mixing. Avoid breathing lubricant dust. Not an acute hazard. May cause mechanical eye or skin irritation in high concentra-tions. As with all mineral spills, minimize dusting during clean-up. Prolonged inhalation may cause lung injury.
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118-231B Table of Contents 08/06/2015
Great Plains Manufacturing, Inc. Table of Contents 3
Sprockets
Sprockets control seed rate only for singulating, volu-metric and finger pick-up meters. Small seed (feeder cup) rate is independent of these sprockets.
Drive Speed Range SprocketsSelect the correct drive speed range sprockets for your seed by referring to the Seed Rate Charts beginning on page 4.
Refer to Figure 1
Loosen idler and remove chain . Remove retaining pins from shafts and install speed range sprockets as necessary.
Note: Make sure the correct sprockets have been in-stalled in the DRIVER and DRIVEN locations as shown.
Reroute chain over sprockets and idlers as shown. Move idler into chain so chain has 14in slack in its longest span. Tighten idler and install retaining pins.
Set the same drive range sprocket combination on both gauge wheels.
Transmission SprocketsTo change the seeding rate, change the transmission sprocket combination. Refer to the Seed Rate Charts beginning on page 4. Note which sprocket is Driving and which is Driven .
Refer to Figure 2
Loosen idler plate and remove drive chain . Remove lynch pins from shafts and rearrange drive and driven sprockets as necessary.
Reroute drive chain over sprockets and idlers as shown. Move idlers into chain so chain has 14in slack in its lon-gest span. Tighten idlers and install lynch pins.
Set the same transmission sprocket combination on both gauge wheels.
Figure 1Drive Speed Range Sprockets
18277
5
2
3
1
4
3
1 2
3
4 5
Figure 2Transmission Sprockets
18278
3
1
5
4
2
5
1
2
3 4
5
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Singulating Meter Charts
Singulating meter planting rate is determined by:
• crop and seed variant• meter wheel selection, and• meter drive configuration
There are no other adjustments.
The rates indicated in the charts are approximate values. To assure the most accurate seeding rate it is recom-mended that the drill be calibrated for the desired seed at the time of planting.
Note: 20P series openers use a black seed wheels.25P series openers use a green seed wheel.
Reading a Singulated Rate Chart
These charts are estimations of maximum seed rates for the Yield-Pro planter. Actual results will vary based on conditions and machine maintenance. Maintain your Yield-Pro Planter regularly for optimum performance.
1. Consult the chart for your crop, meter wheel/cell count, and row spacing. Some charts have two pages.
2. Note whether talc only, or talc and graphite are required. See “Seed Lubricants” on page 2 for seed lubricant information.
3. Find the columns for your row spacing.
4. Find the desired seed population range (or seed spacing).
5. Note the maximum ground speed for that population.
6. The Range sprockets are at the top of the columns for the row spacing.
7. The Transmission sprockets are in the table rows, found to the left of the Population.
Opener Series: 10HDP - 25P SOYBEAN Opener S
403-122D 1700-2200 seeds/lb Page 1 of 2 403-071D
Singulating
100 Cell Wheel
TALC REQUIRED
Drill Models: 7 1/2" Row Spacing 8" Row Spacing
20' Precision 3PT
25' Precision 3PT Range Sprockets: Range Sprockets:
Great Plains Manufacturing, Inc. Table of Contents Singulating Meter Charts 5
Checking Singulated Seeding RateThe seed charts are based on cleaned and sized seed. Extreme seed size variations, foreign material and tire pressure will affect the seeding rate. Check the seed population rate as described below.
1. Adjust the planting depth to a shallow setting.
2. Plant at the desired planting speed for a short dis-tance.
3. Using the table below, determine how many rows need to be counted.
4. Measure a distance, according to the table, for the row spacing in the planted area.
5. Multiply the number of seeds counted by 200 if mea-suring for 1200 acre or 1,000 if measuring for 11000 acre. This is the plant population in seeds per acre.
Example 1:If you have a 912in row spacing drill, according to the table, three rows must be counted. Measure 18ft 4in and count the number of seeds in three rows. If the number is, for example, 180, multiply 180 by 1,000.
180 x 1,000 = 180,000 seeds per acre.
Example 2:If you have a Twin Row 30in spacing drill, according to the chart, both rows of the twin row must be counted. Measure 87ft 1in and count the number of seeds in the parallel row. If the number is, for example, 170, multiply 170 by 200.
170 x 200 = 34,000 seeds per acre.
Note: Both rows of the Twin Row count as one row.
6. If planting population is significantly different than desired, make the following checks:
• Double check the transmission and range sprocket combinations. Refer to the seed population chart for the seed being planted.• Check the air pressure in the gauge wheel tires. Refer to “Tire Inflation Chart” in the Operator’s Man-ual. • Refer to “Troubleshooting” in the operator’s manual.
Seed Rate ChartsSeed rate charts begin on the next page. The charts give transmission sprocket combination and drive range sprockets for row spacing used, to achieve the popula-tion desired. The charts also give seed spacing and max-imum planting speed.
Note: USE 1200 ACRE FOR POPULATIONS LESS THAN 100,000 SEEDS/ACRE. USE 11000 ACRE FOR POPULATIONS ABOVE 100,000 SEEDS/ACRE.
Planted row spacing
Number of rows to count
Length of row to measure for 1/1000 acre
Length of row to measure for 1/200 acre
712in 4 17ft 5in
8in 6 16ft 4in
912in 3 18ft 4in
15in 2 17ft 5in 87ft 1in
Twin Row 30in 30in 1* 17ft 5in 87ft 1in
Twin Row 36in 36in 1* 14ft 6in 72ft 7in
Twin Row 38in 38in 1* 13ft 9in 68ft 9in
Twin Row 40in 40in 1* 13ft 1in 65ft 4in
* Count each pair in a twin row as a single row.
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22 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
Volumetric Charts
Volumetric meter planting rate is determined by:
• crop and seed variant• meter wheel selection, and• meter drive configuration
The are no other adjustments.
The rates indicated in the charts are approximate values. To assure the most accurate seeding rate it is recom-mended that the drill be calibrated for the desired seed at the time of planting.
Reading a Volumetric Rate ChartHydraulic or Ground Drive1. Consult the chart for your crop and meter wheel.
2. Note any seed lubricant required. See “Seed Lubri-cants” on page 2 for seed lubricant information.
3. Find the columns for your row spacing.
4. Find the desired seed rate (which is pounds per acre for volumetric seeds).
5. Note the maximum ground speed for that rate.
6. The Range sprockets are at the top of the columns for the row spacing.
7. The Transmission sprockets are in the table rows, found to the left of the Seed Rate.
Range Sprockets: Range Sprockets: Range Sprockets: Range Sproc
Driver = 15 Driver = 16 Driver = 19 Driver = 30
15" Row Sp
Transmission Maximum Maximum Max
Combinations Seed Planting Planting Pla
Rate Speed Speed Sp
Driver Driven (pounds/acre) (mph) (mph) (m
17 28 23.4 8 8
17 27 24.3 8 8
17 26 25.3 8 8
19 28 26.2 8 8
Transmission Maximum Maximum Maxi
Combinations Seed Planting Planting Plan
Rate Speed Speed Sp
Driver Driven (pounds/acre) (mph) (mph) (m
17 28 23.4 8 8 8
17 27 24.3 8 8 8
17 26 25.3 8 8 8
19 28 26 2 8 8 8TALC REQUIRED
Drill Models: 7 1/2" Row Spacing 8" Row Spacing
20' Precision 3PT
25' Precision 3PT Range Sprockets: Range Sprockets:
Driver = 15 Driver = 16
Driven = 30 Driven = 30
Transmission Maximum Maximum
Combinations Seed Planting Planting
Rate Speed Speed
Driver Driven (pounds/acre) (mph) (mph)
17 28 23.4 8 8
17 27 24.3 8 8
17 26 25.3 8 8
19 28 26.2 8 8
17 25 26 3 8 8
118-231B Table of Contents 08/06/2015
Great Plains Manufacturing, Inc. Table of Contents Volumetric Charts 23
Checking Volumetric Seeding RateThe seed charts are based on cleaned seed and 11L x 15, rib implement tires. Factors including foreign material, seed treatment, seed size, seed weight, field conditions and tire pressure will affect seeding rate. Set and check the seeding rate, then readjust the rate as necessary.
1. Record the weight of an empty container large enough to hold seed metered from three meters for one acre.
2. Place several pounds of seed over three seed meters on an outside end of the drill box.
Note: If drill box is full, shut off sliding seed tubes to all but three meters on an outside end.
3. Raise drill off ground.
4. Turn gauge wheel a few turns to fill meters with seed and until seed drops to ground from all three openers.
5. Place a container under the three openers to gather seed as it is metered.
6. Using the chart on the next page, select your row spacing and determine the correct number of revolu-tions per acre. Turn drive gauge wheel the selected revolutions for your row spacing. Check in box to make sure seed tubes have plenty of seed covering them.
7. Weigh measured seed. Subtract initial weight of empty container. Divide by three for the amount metered by each meter, then multiply by the number of rows for the pounds-per-acre seeding rate.
8. If seeding rate is different than desired:
• Double check transmission sprocket and drive range sprocket combinations. • Check for meter malfunction.• Check for correct seed meter wheel.• Check that all three rows are getting seed.• Refer to Troubleshooting in the operator’s manual.
9. Readjust transmission and/or range sprockets and repeat test.
Great Plains Manufacturing, Inc. Table of Contents 41
Checking Finger Meter Rate
The seed charts are based on cleaned and sized seed. Extreme seed size variations, foreign material and tire pressure will affect the seeding rate. Check the seed population rate as described below.
1. Adjust the planting depth to a shallow setting.
2. Plant at the desired planting speed for a short dis-tance.
3. Using the table below, determine how many rows need to be counted.
4. Measure a distance, according to the table, for the row spacing in the planted area.
5. Multiply the number of seeds counted by 200 if mea-suring for 1200 acre or 1,000 if measuring for 11000 acre. This is the plant population in seeds per acre.
Example 1:If you have a 912in row spacing drill, according to the table, three rows must be counted. Measure 18ft 4in and count the number of seeds in three rows. If the number is, for example, 180, multiply 180 by 1,000.
180 x 1,000 = 180,000 seeds per acre.
Example 2:If you have a Twin Row 30in spacing drill, according to the chart, both rows of the twin row must be counted. Measure 87ft 1in and count the number of seeds in the parallel row. If the number is, for example, 170, multiply 170 by 200.
170 x 200 = 34,000 seeds per acre.
Note: Both rows of the Twin Row count as one row.
6. If planting population is significantly different than desired, make the following checks:
• Double check the transmission and range sprocket combinations. Refer to the seed population chart for the seed being planted.• Check the air pressure in the gauge wheel tires. Refer to “Tire Inflation Chart” in the Operator’s Man-ual. • Refer to “Troubleshooting” in the operator’s manual.
Seed Rate ChartsSeed rate charts begin on the next page. The charts give transmission sprocket combination and drive range sprockets for row spacing used, to achieve the popula-tion. The charts also give seed spacing and maximum planting speed.
Note: USE 1200 ACRE FOR POPULATIONS LESS THAN 100,000 SEEDS/ACRE. USE 11000 ACRE FOR POPULA-TIONS ABOVE 100,000 SEEDS/ACRE.
Planted row spacing
Number of rows to count
Length of row to measure for 1/1000 acre
Length of row to measure for 1/200 acre
712in 4 17ft 5in
8in 6 16ft 4in
912in 3 18ft 4in
15in 2 17ft 5in 87ft 1in
Twin Row 30in 30in 1*
* Count each pair in a twin row as a single row.
17ft 5in 87ft 1in
Twin Row 36in 36in 1* 14ft 6in 72ft 7in
Twin Row 38in 38in 1* 13ft 9in 68ft 9in
Twin Row 40in 40in 1* 13ft 1in 65ft 4in
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Finger Meter AdjustmentsThe finger pick up meter has an adjustable brush. The brush has been pre-set to the optimum setting for most seed sizes.
Finger Meter Brush AdjustmentThe brush reduces or eliminates “doubles” (delivering two seeds per finger), but if set too aggressively can cause “skips” (delivering no seed on some fingers). As needed, adjust for minimal doubles and skips.
Note: These instructions describe the current finger pick-up meter shipped with new Great Plains drills, which has an integrated adjustment lever for the brush. If you have added pre-existing finger meters after purchase, there is some chance that you may have previous model meters, adjusted by screw-driver rather than lever. If so, rely on counting de-tents to determine the setting. Not all have 9 detents.
Refer to Figure 3
The adjustable brush provides additional flexibility to accommodate a wide range of seed sizes. Use lever to gently rotate the brush into position.
The settings range from 1 to 5 with detents at each half step, for a total of 9 detents. Although the numbers are molded into the meter housing, only “1” and “5” may be visible. To ensure consistency, rotate the lever fully counter-clockwise (1), and count detents as you advance it to the desired setting.
Use the general guidelines in the table below to adjust the brush position to your seed size and shape. The numbers listed correspond to the numbers printed on the outer housing of your meter.
If there is a decal on your meter, its units are in pounds per 80,000 seed bag. The table below includes seeds per pound.
Figure 3Finger Meter Brush Lever
25276
5
1
43
2
L
L
LBag Weight
(80,000 seeds)Seeds Per
PoundBrushSetting
Rounds
65 lbs 1230 or less 165 to 55 lbs 1230 to 1450 255 to 45 lbs 1450 to 1780 345 to 35 lbs 1780 to 2300 4
35 lbs 2300 or more 5
Flats
45 lbs 1780 or less 145 to 35 lbs 1780 to 2300 2
35 lbs 2300 or more 3
118-231B Table of Contents 08/06/2015
Great Plains Manufacturing, Inc. Table of Contents Checking Finger Meter Rate 43
Finger Meter InsertsRefer to Figure
The backing plate is equipped with an “A” insert . In tests, this insert provides the best performance in most seed sizes. However, there are two alternative inserts that can be used. Before changing to a different insert, please consult with a Great Plains service representa-tive for a recommendation.
The identification of the insert type is molded into the back of the insert.
Be cautious in using seed treatments, additives, and other chemicals when possible. They can cause meter performance problems and premature wear to meter parts.
Avoid the use of graphite with untreated seeds. If graphite must be used, use Precision™ planting graphite or Great Plains graphite which is less abra-sive. Seeds with Maxi, Captan, Cruiser, Poncho and similar treatments can benefit from graphite. Use the amount recommended on the graphite container, usu-ally 1 tsp/unit or 1 tsp/80,000#.
Always store meters in a dry, secure place, with brush in between two meter fingers. Moisture, temperature, nest-building insects and rodents can create problems.
Always pay attention to your seed monitor and operat-ing manual. Monitor the amount of seed you are plant-ing compared to your expectations. Always investigate abnormalities!
Figure 4Finger Meter Insert
22908
1
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44 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
30in Rows, 6 Finger Meter
2010-HDP 2025-P 30" ROWS 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 6 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 75 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 60 For Flat Corn optimum meter speed is 60 to 75 RPM
Great Plains Manufacturing, Inc. Table of Contents Checking Finger Meter Rate 45
30in Rows, 12 Finger Meter
2010-HDP 2025-P 30" ROWS 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 12 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 75 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 60 For Flat Corn optimum meter speed is 60 to 75 RPM
46 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
30in Twin Rows, 6 Finger Meter
2010-HDP 2025-P TWIN ROW 30" 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 6 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 85 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 60 For Flat Corn optimum meter speed is 60 to 85 RPM
Great Plains Manufacturing, Inc. Table of Contents Checking Finger Meter Rate 47
30in Twin Rows, 12 Finger Meter
2010-HDP 2025-P TWIN ROW 30" 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 12 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 75 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 30 For Flat Corn optimum meter speed is 60 to 75 RPM
48 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
36in Twin Rows, 6 Finger Meter
2010-HDP 2025-P TWIN ROW 36" 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 6 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 85 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 60 For Flat Corn optimum meter speed is 60 to 85 RPM
Great Plains Manufacturing, Inc. Table of Contents Checking Finger Meter Rate 49
36in Twin Rows, 12 Finger Meter
2010-HDP 2025-P TWIN ROW 36" 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 12 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 75 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 30 For Flat Corn optimum meter speed is 60 to 75 RPM
50 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
38in Rows, 6 Finger Meter
2010-HDP 2025-P 38" ROWS 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 6 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 75 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 60 For Flat Corn optimum meter speed is 60 to 75 RPM
Great Plains Manufacturing, Inc. Table of Contents Checking Finger Meter Rate 51
38in Rows, 12 Finger Meter
2010-HDP 2025-P 38" ROWS 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 12 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 75 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 60 For Flat Corn optimum meter speed is 60 to 75 RPM
52 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
38in Twin Rows, 6 Finger Meter
2010-HDP 2025-P TWIN ROW 38" 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 6 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 85 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 60 For Flat Corn optimum meter speed is 60 to 85 RPM
Great Plains Manufacturing, Inc. Table of Contents Checking Finger Meter Rate 53
38in Twin Rows, 12 Finger Meter
2010-HDP 2025-P TWIN ROW 38" 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 12 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 75 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 30 For Flat Corn optimum meter speed is 60 to 75 RPM
54 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
40in Rows, 6 Finger Meter
2010-HDP 2025-P 40" ROWS 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 6 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 75 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 60 For Flat Corn optimum meter speed is 60 to 75 RPM
Great Plains Manufacturing, Inc. Table of Contents Checking Finger Meter Rate 55
40in Rows, 12 Finger Meter
2010-HDP 2025-P 40" ROWS 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 12 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 75 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 60 For Flat Corn optimum meter speed is 60 to 75 RPM
56 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
40in Twin Rows, 6 Finger Meter
2010-HDP 2025-P TWIN ROW 40" 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 6 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 85 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 60 For Flat Corn optimum meter speed is 60 to 85 RPM
Great Plains Manufacturing, Inc. Table of Contents Checking Finger Meter Rate 57
40in Twin Rows, 12 Finger Meter
2010-HDP 2025-P TWIN ROW 40" 2510-HDP 2525-P
ATTENTION ! ! ! (For all seed corn types) 12 Finger MeterGreat Plains always recommends test stand calibration of the finger meter to the population and ground speed desired .
For Round Corn optimum meter speed is 45 to 75 RPM
( Shaded & Non shaded areas )
Range Sprockets:
Driver = 30 For Flat Corn optimum meter speed is 60 to 75 RPM
58 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
Sprocket Indexing (Stagger)
This chapter applies only to finger meters.
If you are planting:• finger-metered,• twin-row crops,• at seed interval spacings above 612 inches,you can synchronize each pair of adjacent meters in a twin row so that you achieve the maximum seed-to-seed spacing between the units of the pair.
If you are planting:- single-row,- or with singulating meters,- or a volumetric crop,- or twin row with seed spacings below 612in,this section of the manual, and the sprocket indexing charts, do not apply to your operations.
If the initial indexing does not provide equal spacing, see “Indexing Fine Adjustment” on page 68.
Refer to Figure 51. Find the chart for your row spacing, meter finger
count and desired seed population. Note the “Rear Meter Sprocket Tooth #” value in the far right col-umn.
2. Remove both meters of a row unit pair. Note that tooth 1 and many of the other teeth on the driven sprockets , are stamped with a tooth number.
On front row unit:
3. Relax idlers on front meter drive by lifting the spring off the rear post .
4. Lift chain off driven sprocket , and rotate sprocket so that tooth 1 is as close as possible to straight up (top dead center).
5. Re-engage chain and idlers, making sure chain is taut at top, and that sprocket tooth 1 has not shifted off TDC.
On rear row unit:
6. Relax idlers on rear meter drive by lifting the spring off the rear post .
7. Lift chain off driven sprocket , and rotate sprocket so that the tooth number called for in the chart is at TDC (or is the same as the front row sprocket).
8. Re-engage chain and idlers, making sure chain is taut at top, and that the designated sprocket tooth has not shifted off TDC.
9. Re-install meters. No particular wheel orientation is required during meter installation. The meter engagement is symmetrical, and the results identical no matter how the coupler captures the meter shaft.
28420
Figure 5Sprocket Indexing
25417
12 3
5
46
1 2
3
4
1
5
6
2
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Great Plains Manufacturing, Inc. Table of Contents Sprocket Indexing (Stagger) 59
30in Rows, 6-Finger Indexing
NOTE: This chart is for indexing finger pickup meter sprockets
only!!! Indexing sprockets will help time twin rows to drop seeds
in an alternating sequence. This chart is NOT a seed rate chart.
Twin Row 30" 6 Finger Meter Indexing ChartFront Meter Rear Meter
Sprocket Tooth # Sprocket Tooth #
15300 16900 27.3 24.7 1 7
16900 18400 24.7 22.7 1 10
18400 20000 22.7 20.9 1 13
20000 21600 20.9 19.4 1 16
21600 23200 19.4 18.0 1 19
23200 24700 18.0 16.9 1 3
24700 26300 16.9 15.9 1 6
26300 27900 15.9 15.0 1 9
27900 29400 15.0 14.2 1 12
29400 31000 14.2 13.5 1 15
31000 32600 13.5 12.8 1 18
32600 34200 12.8 12.2 1 2
34200 35700 12.2 11.7 1 5
35700 37300 11.7 11.2 1 8
37300 38900 11.2 10.8 1 11
38900 40400 10.8 10.4 1 14
40400 42000 10.4 10.0 1 17
42000 43600 10.0 9.6 1 1
43600 45200 9.6 9.3 1 4
45200 46700 9.3 9.0 1 7
46700 48200 9.0 8.7 1 10
48200 49900 8.7 8.4 1 13
49900 51400 8.4 8.1 1 16
51400 54000 8.1 7.7 1 19
NOTE: If rear row does not appear centered between front row seeds, small adjustment
may be made to the stagger. Refer to "Adjustments to Seed Stagger on 6 Finger Meters."
NOTE: Indexing finger pickup meters can be done with the drill in planting position or with
the drill raised (all openers in their lowest position).
1. Pick the planting population which you want to plant from the chart above.
NOTE: When indexing sprockets, the top side of the meter drive chain must be tight.
2. Set the front row meter drive sprockets so the tooth stamped #1 is straight up.
3. Set the rear row meter drive sprockets to match the number from the chart above. Be sure
Population Range Seed Spacing Range
the number is straight up.
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30in Rows, 12-Finger IndexingNOTE: This chart is for indexing finger pickup meter sprockets
only!!! Indexing sprockets will help time twin rows to drop seeds
in an alternating sequence. This chart is NOT a seed rate chart.
Twin Row 30" 12 Finger Meter Indexing Chart
Front Meter Rear Meter
Sprocket Tooth # Sprocket Tooth #
18400 20000 22.7 20.9 1 7
20000 21600 20.9 19.4 1 18
21600 23200 19.4 18.0 1 10
23200 24700 18.0 16.9 1 2
24700 26100 16.9 16.0 1 13
26100 27900 16.0 15.0 1 5
27900 29400 15.0 14.2 1 16
29400 31000 14.2 13.5 1 8
31000 32600 13.5 12.8 1 19
32600 34100 12.8 12.3 1 11
34100 35700 12.3 11.7 1 3
35700 37300 11.7 11.2 1 14
37300 38900 11.2 10.8 1 6
38900 40500 10.8 10.3 1 17
40500 41900 10.3 10.0 1 9
41900 43700 10.0 9.6 1 1
43700 45100 9.6 9.3 1 12
45100 46700 9.3 9.0 1 4
46700 48300 9.0 8.7 1 15
48300 49900 8.7 8.4 1 7
49900 51400 8.4 8.1 1 18
51400 52900 8.1 7.9 1 10
52900 54500 7.9 7.7 1 2
54500 56200 7.7 7.4 1 13
56200 57800 7.4 7.2 1 5
57800 59300 7.2 7.1 1 16
59300 60900 7.1 6.9 1 8
60900 62400 6.9 6.7 1 19
62400 64000 6.7 6.5 1 11
NOTE: If rear row does not appear centered between front row seeds, small adjustment
may be made to the stagger. Refer to "Adjustments to Seed Stagger on 12 Finger Meters."
NOTE: Indexing finger pickup meters can be done with the drill in planting position or with
the drill raised (all openers in their lowest position).
1. Pick the planting population which you want to plant from the chart above.
NOTE: When indexing sprockets, the top side of the meter drive chain must be tight.
2. Set the front row meter drive sprockets so the tooth stamped #1 is straight up.
3. Set the rear row meter drive sprockets to match the number from the chart above. Be sure
Population Range Seed Spacing Range
the number is straight up.
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Great Plains Manufacturing, Inc. Table of Contents Sprocket Indexing (Stagger) 61
36in Rows, 6-Finger Indexing
NOTE: This chart is for indexing finger pickup meter sprockets
only!!! Indexing sprockets will help time twin rows to drop seeds
in an alternating sequence. This chart is NOT a seed rate chart.
Twin Row 36" 6 Finger Meter Indexing ChartFront Meter Rear Meter
Sprocket Tooth # Sprocket Tooth #
12800 14100 27.2 24.7 1 7
14100 15400 24.7 22.6 1 10
15400 16700 22.6 20.9 1 13
16700 18000 20.9 19.4 1 16
18000 19300 19.4 18.1 1 19
19300 20600 18.1 16.9 1 3
20600 21900 16.9 15.9 1 6
21900 23200 15.9 15.0 1 9
23200 24500 15.0 14.2 1 12
24500 25800 14.2 13.5 1 15
25800 27200 13.5 12.8 1 18
27200 28500 12.8 12.2 1 2
28500 29800 12.2 11.7 1 5
29800 31100 11.7 11.2 1 8
31100 32400 11.2 10.8 1 11
32400 33700 10.8 10.3 1 14
33700 35000 10.3 10.0 1 17
35000 36300 10.0 9.6 1 1
36300 37700 9.6 9.2 1 4
37700 38900 9.2 9.0 1 7
38900 40100 9.0 8.7 1 10
40100 41600 8.7 8.4 1 13
41600 42900 8.4 8.1 1 16
42900 45000 8.1 7.7 1 19
NOTE: If rear row does not appear centered between front row seeds, small adjustment
may be made to the stagger. Refer to "Adjustments to Seed Stagger on 6 Finger Meters."
NOTE: Indexing finger pickup meters can be done with the drill in planting position or with
the drill raised (all openers in their lowest position).
1. Pick the planting population which you want to plant from the chart above.
NOTE: When indexing sprockets, the top side of the meter drive chain must be tight.
2. Set the front row meter drive sprockets so the tooth stamped #1 is straight up.
3. Set the rear row meter drive sprockets to match the number from the chart above. Be sure
Population Range Seed Spacing Range
the number is straight up.
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36in Rows, 12-Finger IndexingNOTE: This chart is for indexing finger pickup meter sprockets
only!!! Indexing sprockets will help time twin rows to drop seeds
in an alternating sequence. This chart is NOT a seed rate chart.
Twin Row 36" 12 Finger Meter Indexing ChartFront Meter Rear Meter
Sprocket Tooth # Sprocket Tooth #
15400 16700 22.6 20.9 1 7
16700 18000 20.9 19.4 1 18
18000 19300 19.4 18.1 1 10
19300 20600 18.1 16.9 1 2
20600 21700 16.9 16.1 1 13
21700 23200 16.1 15.0 1 5
23200 24500 15.0 14.2 1 16
24500 25900 14.2 13.5 1 8
25900 27200 13.5 12.8 1 19
27200 28400 12.8 12.3 1 11
28400 29800 12.3 11.7 1 3
29800 31100 11.7 11.2 1 14
31100 32400 11.2 10.8 1 6
32400 33700 10.8 10.3 1 17
33700 34900 10.3 10.0 1 9
34900 36400 10.0 9.6 1 1
36400 37600 9.6 9.3 1 12
37600 38900 9.3 9.0 1 4
38900 40300 9.0 8.6 1 15
40300 41600 8.6 8.4 1 7
41600 42900 8.4 8.1 1 18
42900 44100 8.1 7.9 1 10
44100 45400 7.9 7.7 1 2
45400 46800 7.7 7.4 1 13
46800 48100 7.4 7.2 1 5
48100 49400 7.2 7.1 1 16
49400 50700 7.1 6.9 1 8
50700 52000 6.9 6.7 1 19
52000 53400 6.7 6.5 1 11
NOTE: If rear row does not appear centered between front row seeds, small adjustment
may be made to the stagger. Refer to "Adjustments to Seed Stagger on 12 Finger Meters."
NOTE: Indexing finger pickup meters can be done with the drill in planting position or with
the drill raised (all openers in their lowest position).
1. Pick the planting population which you want to plant from the chart above.
NOTE: When indexing sprockets, the top side of the meter drive chain must be tight.
2. Set the front row meter drive sprockets so the tooth stamped #1 is straight up.
3. Set the rear row meter drive sprockets to match the number from the chart above. Be sure
Population Range Seed Spacing Range
the number is straight up.
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Great Plains Manufacturing, Inc. Table of Contents Sprocket Indexing (Stagger) 63
38in Rows, 6-Finger IndexingNOTE: This chart is for indexing finger pickup meter sprockets
only!!! Indexing sprockets will help time twin rows to drop seeds
in an alternating sequence. This chart is NOT a seed rate chart.
Twin Row 38" 6 Finger Meter Indexing ChartFront Meter Rear Meter
Sprocket Tooth # Sprocket Tooth #
12100 13300 27.3 24.8 1 7
13300 14600 24.8 22.6 1 10
14600 15800 22.6 20.9 1 13
15800 17000 20.9 19.4 1 16
17000 18300 19.4 18.0 1 19
18300 19500 18.0 16.9 1 3
19500 20800 16.9 15.9 1 6
20800 22000 15.9 15.0 1 9
22000 23200 15.0 14.2 1 12
23200 24500 14.2 13.5 1 15
24500 25700 13.5 12.8 1 18
25700 27000 12.8 12.2 1 2
27000 28200 12.2 11.7 1 5
28200 29500 11.7 11.2 1 8
29500 30700 11.2 10.8 1 11
30700 31900 10.8 10.3 1 14
31900 33200 10.3 9.9 1 17
33200 34400 9.9 9.6 1 1
34400 35700 9.6 9.2 1 4
35700 36900 9.2 8.9 1 7
36900 38000 8.9 8.7 1 10
38000 39400 8.7 8.4 1 13
39400 40600 8.4 8.1 1 16
40600 42600 8.1 7.7 1 19
NOTE: If rear row does not appear centered between front row seeds, small adjustment
may be made to the stagger. Refer to "Adjustments to Seed Stagger on 6 Finger Meters."
NOTE: Indexing finger pickup meters can be done with the drill in planting position or with
the drill raised (all openers in their lowest position).
1. Pick the planting population which you want to plant from the chart above.
NOTE: When indexing sprockets, the top side of the meter drive chain must be tight.
2. Set the front row meter drive sprockets so the tooth stamped #1 is straight up.
3. Set the rear row meter drive sprockets to match the number from the chart above. Be sure
Population Range Seed Spacing Range
the number is straight up.
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64 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
38in Rows, 12-Finger IndexingNOTE: This chart is for indexing finger pickup meter sprockets
only!!! Indexing sprockets will help time twin rows to drop seeds
in an alternating sequence. This chart is NOT a seed rate chart.
Twin Row 38" 12 Finger Meter Indexing ChartFront Meter Rear Meter
Sprocket Tooth # Sprocket Tooth #
14600 15800 22.6 20.9 1 7
15800 17000 20.9 19.4 1 18
17000 18300 19.4 18.0 1 10
18300 19500 18.0 16.9 1 2
19500 20600 16.9 16.0 1 13
20600 22000 16.0 15.0 1 5
22000 23200 15.0 14.2 1 16
23200 24500 14.2 13.5 1 8
24500 25700 13.5 12.8 1 19
25700 27000 12.8 12.2 1 11
27000 28200 12.2 11.7 1 3
28200 29500 11.7 11.2 1 14
29500 30700 11.2 10.8 1 6
30700 32000 10.8 10.3 1 17
32000 33100 10.3 10.0 1 9
33100 34500 10.0 9.6 1 1
34500 35600 9.6 9.3 1 12
35600 36900 9.3 8.9 1 4
36900 38200 8.9 8.6 1 15
38200 39400 8.6 8.4 1 7
39400 40600 8.4 8.1 1 18
40600 41800 8.1 7.9 1 10
41800 43000 7.9 7.7 1 2
43000 44400 7.7 7.4 1 13
44400 45600 7.4 7.2 1 5
45600 46800 7.2 7.1 1 16
46800 48100 7.1 6.9 1 8
48100 49300 6.9 6.7 1 19
49300 50600 6.7 6.5 1 11
NOTE: If rear row does not appear centered between front row seeds, small adjustment
may be made to the stagger. Refer to "Adjustments to Seed Stagger on 12 Finger Meters."
NOTE: Indexing finger pickup meters can be done with the drill in planting position or with
the drill raised (all openers in their lowest position).
1. Pick the planting population which you want to plant from the chart above.
NOTE: When indexing sprockets, the top side of the meter drive chain must be tight.
2. Set the front row meter drive sprockets so the tooth stamped #1 is straight up.
3. Set the rear row meter drive sprockets to match the number from the chart above. Be sure
Population Range Seed Spacing Range
the number is straight up.
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Great Plains Manufacturing, Inc. Table of Contents Sprocket Indexing (Stagger) 65
40in Rows, 6-Finger Indexing
NOTE: This chart is for indexing finger pickup meter sprockets
only!!! Indexing sprockets will help time twin rows to drop seeds
in an alternating sequence. This chart is NOT a seed rate chart.
Twin Row 40" 6 Finger Meter Indexing ChartFront Meter Rear Meter
Sprocket Tooth # Sprocket Tooth #
11500 12600 27.3 24.9 1 7
12600 13800 24.9 22.7 1 10
13800 15000 22.7 20.9 1 13
15000 16200 20.9 19.4 1 16
16200 17400 19.4 18.0 1 19
17400 18500 18.0 17.0 1 3
18500 19700 17.0 15.9 1 6
19700 20900 15.9 15.0 1 9
20900 22100 15.0 14.2 1 12
22100 23200 14.2 13.5 1 15
23200 24400 13.5 12.9 1 18
24400 25600 12.9 12.3 1 2
25600 26800 12.3 11.7 1 5
26800 28000 11.7 11.2 1 8
28000 29200 11.2 10.7 1 11
29200 30300 10.7 10.4 1 14
30300 31500 10.4 10.0 1 17
31500 32700 10.0 9.6 1 1
32700 33900 9.6 9.3 1 4
33900 35000 9.3 9.0 1 7
35000 36100 9.0 8.7 1 10
36100 37400 8.7 8.4 1 13
37400 38600 8.4 8.1 1 16
38600 40500 8.1 7.7 1 19
NOTE: If rear row does not appear centered between front row seeds, small adjustment
may be made to the stagger. Refer to "Adjustments to Seed Stagger on 6 Finger Meters."
NOTE: Indexing finger pickup meters can be done with the drill in planting position or with
the drill raised (all openers in their lowest position).
1. Pick the planting population which you want to plant from the chart above.
NOTE: When indexing sprockets, the top side of the meter drive chain must be tight.
2. Set the front row meter drive sprockets so the tooth stamped #1 is straight up.
3. Set the rear row meter drive sprockets to match the number from the chart above. Be sure
Population Range Seed Spacing Range
the number is straight up.
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40in Rows, 12-Finger IndexingNOTE: This chart is for indexing finger pickup meter sprockets
only!!! Indexing sprockets will help time twin rows to drop seeds
in an alternating sequence. This chart is NOT a seed rate chart.
Twin Row 40" 12 Finger Meter Indexing ChartFront Meter Rear Meter
Sprocket Tooth # Sprocket Tooth #
13800 15000 22.7 20.9 1 7
15000 16200 20.9 19.4 1 18
16200 17400 19.4 18.0 1 10
17400 18500 18.0 17.0 1 2
18500 19600 17.0 16.0 1 13
19600 20900 16.0 15.0 1 5
20900 22100 15.0 14.2 1 16
22100 23300 14.2 13.5 1 8
23300 24500 13.5 12.8 1 19
24500 25600 12.8 12.3 1 11
25600 26800 12.3 11.7 1 3
26800 28000 11.7 11.2 1 14
28000 29200 11.2 10.7 1 6
29200 30400 10.7 10.3 1 17
30400 31400 10.3 10.0 1 9
31400 32700 10.0 9.6 1 1
32700 33800 9.6 9.3 1 12
33800 35000 9.3 9.0 1 4
35000 36300 9.0 8.6 1 15
36300 37400 8.6 8.4 1 7
37400 38600 8.4 8.1 1 18
38600 39700 8.1 7.9 1 10
39700 40800 7.9 7.7 1 2
40800 42200 7.7 7.4 1 13
42200 43300 7.4 7.2 1 5
43300 44500 7.2 7.0 1 16
44500 45700 7.0 6.9 1 8
45700 46800 6.9 6.7 1 19
46800 48000 6.7 6.5 1 11
NOTE: If rear row does not appear centered between front row seeds, small adjustment
may be made to the stagger. Refer to "Adjustments to Seed Stagger on 12 Finger Meters."
NOTE: Indexing finger pickup meters can be done with the drill in planting position or with
the drill raised (all openers in their lowest position).
1. Pick the planting population which you want to plant from the chart above.
NOTE: When indexing sprockets, the top side of the meter drive chain must be tight.
2. Set the front row meter drive sprockets so the tooth stamped #1 is straight up.
3. Set the rear row meter drive sprockets to match the number from the chart above. Be sure
Population Range Seed Spacing Range
the number is straight up.
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Great Plains Manufacturing, Inc. Table of Contents Sprocket Indexing (Stagger) 67
Indexing Fine AdjustmentIf, after indexing, twin-row side-to-side seed stagger is substantially imbalanced, it is possible to make small adjustments that may correct it.
The procedure is different for 6- and 12-finger meters.
If an adjustment is made, test it on one row pair before adjusting the entire drill.
Before making any Indexing Adjustments:
• Check actual planted seed spacing. Seed Spacing is found by measuring the distance between 25 correctly planted seeds in one row and dividing by 24. (A visible skip or double is counted as one seed.)
• Make sure current rear sprocket index number matches the number in the indexing chart for actual seed spac-ing being planted.
6-Finger Meter Stagger AdjustmentFind your current indexing value row in the charts.
Each (sprocket tooth) number directly above or below the current rear meter sprocket setting in the right most col-umn of the seed indexing chart represents a small move-ment of the rear row seed relative to the front row seed.
Changing rear your sprocket to the next number up in the chart retards, moving each rear row seed back a small amount.
Changing rear sprocket to the next number down in the chart advances, moving each rear row seed ahead a small amount.
Example 1: The 6 Finger (Twin Row 30in) planting popu-lation is 29900 or 14in seed spacing. The chart setting for the rear sprocket is (15). Each rear row seed should fall 7in behind the front row seed.
If each rear row seed measures only 6in behind the front row seed, reset the rear meter sprocket to the next num-ber up in the chart (12). This will move the rear seeds back to make the stagger closer to 7in.
Example 2: The 6 Finger (Twin Row 30in) planting popu-lation is 29900 or 14in seed spacing. The chart setting for the rear sprocket is (15). Each rear row seed should fall 7in behind front row seed.
If each rear row seed measures 8in behind the front row seed, reset the rear meter sprocket to the next number down in the chart (18). This will move the rear seeds ahead to make the stagger closer to 7in.
28421
Meter Indexing ChartFront Meter Rear Meter
Sprocket Tooth # Sprocket Tooth #
24.7 1 7
22.7 1 10
20.9 1 13
19.4 1 16
18.0 1 19
16.9 1 3
15.9 1 6
15.0 1 9
14.2 1 12
13.5 1 15
12.8 1 18
12.2 1 2
11.7 1 5
ng Range
Advance ☞
Retard ☞Current ☞
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68 Table of Contents Great Plains Manufacturing, Inc.2020P, 2025P, 2520P, & 2525P
12-Finger Meter Stagger AdjustmentBefore making any Indexing Adjustments, check actual planted seed spacing. Seed Spacing is found by measur-ing the distance between 25 correctly planted seeds in one row and dividing by 24. (A visible skip or double should be counted as one seed.) Make sure current rear sprocket index number matches the number in the index-ing chart for actual seed spacing being planted.
Find your current indexing value row in the charts.
Each (sprocket tooth) number directly above or below the current rear meter sprocket setting in the right most col-umn of the seed indexing chart represents a small move-ment of the rear row seed relative to the front row seed.
Changing rear your sprocket to the next number down in the chart retards, moving each rear row seed back a small amount.
Changing rear sprocket to the next number up in the chart advances, moving each rear row seed ahead a small amount.
Example 1: The 12 Finger (Twin Row 30in) planting pop-ulation is 34800 or 12in seed spacing. The chart setting for the rear sprocket is (3). Each rear row seed should fall 6in behind the front row seed.
If each rear row seed measures 7in behind the front row seed, reset the rear meter sprocket to the next number up in the chart (11). This will move the rear seeds ahead and make the stagger closer to 6in.
Example 2: The 12 Finger (Twin Row 30in) planting pop-ulation is 34800 or 12in seed spacing. The chart setting for the rear sprocket is (3). Each rear row seed should fall 6in behind the front row seed.
If each rear row seed measures 5in behind the front row seed, reset the rear meter sprocket to the next number down in the chart (14). This will move the rear seeds back to make the stagger closer to 6in.
28422
Front Meter Rear Meter
Sprocket Tooth # Sprocket Tooth #
20.9 1 7
19.4 1 18
18.0 1 10
16.9 1 2
16.0 1 13
15.0 1 5
14.2 1 16
13.5 1 8
12.8 1 19
12.3 1 11
11.7 1 3
11.2 1 14
10.8 1 6
10.3 1 17
10.0 1 9
9.6 1 1
9.3 1 12
9.0 1 4
8 7 1 15
cing Range
Advance ☞
Retard ☞Current ☞
118-231B Table of Contents 08/06/2015
69 Implement #(s) Table of Contents Master Page: Blank
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Table of Contents 08/06/2015
Table of Contents
EOD:
Great Plains Manufacturing, Inc.Corporate Office: P.O. Box 5060Salina, Kansas 67402-5060 USA
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