Great Plains Conservation Coulter and Spring Package - Manual (Page 10)

204-328M 7/31/2002
8
Coulter Adjustments
Refer to Illustration on Page 10 or 12
1. To adjust the coulter vertically, loosen the 3/4"
jam nut (7), and the 3/4" x 3" long hex bolt
(12).
2. By turning the recessed nut, rotate the cam
casting (9) to set the desired height. Each in-
crement on the casting (9) represents approx-
imately 1/4" of vertical adjustment.
3. Tighten the bolt (12) and jam nut (7). Check
and tighten all nuts and bolts.
Spring Adjustments
For Great Plains and JD 7200
Refer to Illustration on Page 16 and Table on the
Right
1. ALL spring adjustments must be made with
the planter in the fully raised position.
2. The spring package is adjustable from 90
pounds of down force to 325 pounds of down
force when the planter parallel arms are hori-
zontal. Consult the chart and diagram to ob-
tain the desired down force.
3. If only two springs (2) are to be used, remove
the outer two springs by removing the snap
ring (12) on the end of the spring pivot rod
(14). Slide the rod (14) inward and remove the
spring hook. Then remove the spring (2) from
the hex bar support (1) then reposition the
spring pivot rod and reinstall the snap ring
(12).
4. To adjust the spring tension, lift the plunger
(19) by pulling up on the roll pin (17) and slid-
ing the handle adjustment assembly (1) to the
next hole.
Adjustments
To Obtain This
Down Force
Use This # of
Springs
In This Hole
90 lbs 2 A
105 lbs 2 B
125 lbs 2 C
140 lbs 2 D
160 lbs 2 E
185 lbs 4 A
215 lbs 4 B
245 lbs 4 C
285 lbs 4 D
325 lbs 4 E
Figure 1
Adjustment Bar