Great Plains V-300F Operator Manual - Manual (Page 80)

76 V300 & V300F Great Plains Manufacturing, Inc.
148-057M-A 11/15/2007
Setting Main Seed Box Rate
Setting main seed box rate requires setting the coarse
speed via Drive Type, and the fine speed via the meter
rate adjuster.
1. Consult the Seed Rate Charts (Main Seed Box) for
the initial values of Drive Type and Meter Setting for
your seed and desired population.
Setting Drive Type
Drive Type is set by a single sprocket change in the main
seed box transmission. The transmission is located
below, behind, and to the right of the left lift cylinder, and
is protected by the guard just left of the weight brackets.
Refer to Figure 78
(seed box and lift structure removed for clarity)
2.
Remove the bolts securing the guard over the seed
box transmission, and remove the guard.
Refer to Figure 79
3.
Based on the Drive Type from the rate chart, note the
sprocket
presently in use. The tooth count is
stamped on the face of the sprockets. If the sprocket
in use is the one called for, skip to step 7.
4. Loosen the idler and remove the chain from the
current sprocket. Remove the pin on the lower
shaft.
5. Exchange the current sprocket with the correct size
for the Drive Type required:
6. Place all unused sprockets back on the tree and re-
pin. Engage the idler, leaving
1 ⁄
4
in (6.4mm) slack in
the longest chain span.
7. Re-mount the guard and secure with bolts.
Figure 78
Transmission Guards
23160
Drive Type Sprocket Relative Rate
1 72T Slowest
2 34T 2.1 times Type 1
3 23T 3.1 times Type 1
4 14T 5.1 times Type 1
Figure 79
Drive Type Sprocket
17211
1
3
2
1
2
3