Great Plains 3S-3000F Operator Manual v2 - Manual (Page 34)

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Section 3 Adjustments
3S-3000 Three-Section Folding Drill 195-110M-A 11/9/07
Great Plains Mfg., Inc.
Section 3
Adjustments
Seeding Adjustment
Seed Rate Sprocket Changes
The feeder cup drive system on your drill provides four dif-
ferent drive speeds and adjustable fluted feed cups to al-
lows you to plant a wide variety of seeds and easily vary
the seeding rate. All the seed rate charts for this drill are
based on first selecting one of four available drive sprock-
ets which are referred to as DRIVE TYPES. These sprock-
ets, shown in Figure 3-1, are located on a 7/8 hex transfer
shaft behind the drive clutch on each box section. The
drive types are easily changed by loosening the 12 tooth
idler sprockets on the drive chain, removing the keeper pin
on the hex shaft, and repositioning the sprockets so the
desired drive type sprocket lines up with the clutch sprock-
et. Reroute the drive chain as shown in Figure 3-2 and on
the drive type decal located on the drive support plate near
the idler sprockets. Set the same drive type on all three
drill sections.
Drive Type Sprocket Location
Figure 3-1
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Drive Type Sprockets and Chain Routing
Figure 3-2
NOTE: Be sure chain is installed with the chain connector
link retainer towards the centerline and the clip opening
(split end) faces the opposite way of the chain travel.
Seed Rate Adjustment Handle
Once the correct drive type is chosen according to the
Seed Rate Chart, starting on page 34, position the seed
rate adjustment handle for the desired rate in the chart. To
adjust the seed rate handle as shown in Figure 3-3, loosen
the wing nut on the bottom side of the handle and slide the
handle until the indicator mark lines up with the desired
cup setting. Retighten the wing nut to hold the lever in
place. There is a seed rate adjustment handle for each drill
section.
Feeder Cup Setting
The drill is equipped with a four-position feed cup door on
each feeder cup, as shown in Figure 3-4. The highest han-
dle position is for wheat and other small grain seeds. The
second handle position down is for soybeans and other
large grain seeds. Should excessive cracking occur to
large seeds, drop the handle to the third position down.
The wide open position will allow complete clean-out of
the feed cup. MAKE SURE all handles are in the same po-
sition before drilling.
Drive Type Sprocket Ratio
1 72 Tooth Slowest drive type
2 34 Tooth 2.12 faster than drive type 1
3 23 Tooth 3.13 faster than drive type 1
4 14 Tooth 5.14 faster than drive type 1
Seed Rate Adjustment Handle
Figure 3-3
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