Great Plains 3N-3020 Operator Manual - Manual (Page 48)

3N-3010 and 3N-3020
196-366M 3/29/2012
46
Harrow Adjustment
Harrow Frame Tube
Refer to Figure 36
The harrow setting shown has been successful in
no- and minimum-till conditions. Because of dif-
ferent soil moisture, trash levels and trash types,
you may need to reposition the tube frame or
tines.
11891
Refer to Figure 37
To adjust the frame tube. Loosen four hex nuts (1)
18305
on the u-bolts (2) and rotate the frame tube (3).
To adjust the tines, loosen four 1/2-inch hex nuts
(4) on the 1/2-inch u-bolts (5) on the support bar
(6). Rotate tine tubes (7) so the tines (8) are
against the stop bushings (9) and are at the de-
sired angle. Retighten hex nuts on u-bolts.
Harrow Height
Refer to Figure 38
To set harrow height adjust chain (10) by remov-
ing 3/8-inch bolt (11) and positioning chain as
necessary. Reinstall bolt.
18305
Figure 36
Harrow setting
Figure 37
Frame tube adjustment
Figure 38
Height adjustment