Section 3: Adjustments
OS1548 and OS1572 Overseeder (S/N ) 308-303M
11/28/18
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Section 3: Adjustments
Speed Change Sprocket
The Overseeder is designed with two drive speeds to
accommodate different seed sizes and dispersal rates.
They are high range (fast speed) and low range (slow
speed). Use seed charts beginning on page 26 to
determine which range is correct for the seed you are
dispersing. Some seeds work with both ranges.
High Range Set-up With Gauge Wheel Drive
Instructions below change seeder from low to high range.
Refer to Figure 3-2 & Figure 3-3:
1.
Loosen flange locknut (#1) and remove drive
chain (#2) from speed change sprocket (#3).
2. Pull down on spring idler sprocket (#4) and remove
driven chain (#5) from speed change sprocket (#3).
3. Being careful not to lose the washer behind the
19/35 tooth sprocket (#3), remove 5/8" bolt, lock
washer, and flat washer (#6).
Refer to Figure 3-1 & Figure 3-3:
4. Make certain existing washer is still on the idler shaft.
Install 19/35 tooth sprocket (#3) with 19 tooth
sprocket in front of 35 tooth sprocket. Secure speed
change sprocket with flat washer, lock washer, and
5/8" bolt (#6). Tighten bolt to correct torque.
5. Drive chain (#2) should be 66 pitches long and driven
chain (#5) should be 140 pitches long. If drive chain
has 74 pitches, remove 8 pitches from it and add
those 8 pitches to the driven chain.
6. Replace 140 pitch driven chain (#5) first and then the
66 pitch drive chain (#2). Make sure the spring idler
sprocket (#4) is pressing against driven chain (#5).
7.
Retention drive chain (#2) by pressing down on its
idler sprocket. When tensioned properly, tighten
1/2" flange locknut (#1) to maintain that tension.
Low Range Set-up With Gauge Wheel Drive
Instructions below change seeder from high to low range.
Refer to Figure 3-1 & Figure 3-3:
1.
Loosen flange locknut (#1) and remove drive
chain (#2) from speed change sprocket (#3).
2. Pull down on spring idler sprocket (#4) and remove
driven chain (#5) from speed change sprocket (#3).
3. Being careful not to lose the washer behind the
19/35 tooth sprocket (#3), remove 5/8" bolt, lock
washer, and flat washer (#6).
Refer to Figure 3-2 & Figure 3-3:
4. Make certain existing washer is still on the idler shaft.
Install 19/35 tooth sprocket (#3) with 35 tooth
sprocket in front of 19 tooth sprocket. Secure speed
change sprocket with flat washer, lock washer, and
5/8" bolt (#6). Tighten bolt to correct torque.
5. Drive chain (#2) should be 74 pitches long and driven
chain (#5) should be 132 pitches long. If driven chain
has 140 pitches, remove 8 pitches from it and add
those 8 pitches to the drive chain.
High Range Set-up with Gauge Wheel Drive
Figure 3-1
Low Range Set-up with Gauge Wheel Drive
Figure 3-2
Sprocket Alignment with Gauge Wheel Drive
Figure 3-3
6. Replace 132 pitch driven chain (#5) first and then the
74 pitch drive chain (#2). Make sure the spring idler
sprocket (#4) is pressing against driven chain (#5).
7.
Retention drive chain (#2) by pressing down on its
idler sprocket. When tensioned properly, tighten
1/2" flange locknut (#1) to maintain that tension.
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