Great Plains 2S-2600F Operator Manual v2 - Manual (Page 25)

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Section 3 Adjustments
9/26/13 2S-2600 and 2S-2600F Two-Section Folding Drill 195-200M-A
Great Plains Mfg., Inc.
Section 3
Adjustments
This section covers basic field and maintenance adjust-
ments. Before going to the field, set the seeding rate and
adjust seeding depth. Check drive chains and disk scrap-
ers periodically during the season.
Seed Rate Calibration
Calibrating the seeding rate requires four steps:
• changing drive sprockets,
• setting seed-rate handle,
• positioning seed-cup doors, and
• checking seeding rate.
Refer to the seed-rate charts. These charts list proper
sprocket sizes and seed-rate-handle settings for various
seeds and seeding rates.
The seed-rate charts are based on cleaned, untreated
seed of average size and test weight. The charts are
based on 9.5L-15, 6-ply, rib implement tires. Many factors
will affect seeding rates including foreign material, seed
treatment, seed size, seed weight, field conditions, tire
pressure and test weight. You likely will need to make mi-
nor adjustments. Set and check the seeding rate using the
procedures below, then readjust the rate as necessary.
For correct drive type, refer to seed-rate charts beginning
on page 25. The charts lists drive types as 1, 2, 3 or 4. Re-
fer to the following table for correct-sized sprocket for each
drive type.
To change drive types, loosen idlers and remove drive
chain shown in Figure 3-1. Remove lynch pin and rear-
range sprockets on shaft.
Figure 3-1
Drive Type Sprockets
Reroute drive chain as shown in Figure 3-2. Set same
drive type on both drill sections. Be sure chain is installed
with the chain connector link retainer towards the center-
line and the clip opening (split end) faces the opposite way
of the chain travel.
Figure 3-2
Drive Type Sprockets and Chain Routings
Drive
Type
Sprocket Speed
Type 1 72-tooth Slowest
Type 2 34 tooth Two Times Faster Than Type 1
Type 3 23-tooth Three Times Faster Than Type 1
Type 4 14-tooth Five Times Faster Than Type 1
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