Great Plains CDA600 Operator Manual - Manual (Page 46)

Centurion CDA600
270-600M-ENG
44 2013-06-14
4.11.2 Row Unit Spring
Adjustment
Row unit springs normally require no
adjustment. The factory setting for the row
unit springs is:
ΠSpring length - 324 mm
 Assembly length - 562 mm
In some unusual conditions, rows in tyre
tracks may need to be set heavier.
Make adjustments with the wings unfolded
and the rows lifted off the ground, so that
the springs are at full extension.
Loosen the locking nut Ž. Rotate the
adjuster nut . Shorten spring to increase
down-force; lengthen spring to reduce
down-force.
For each turn of the adjuster nut, the
down force at the opener disc changes by
approximately 1.7 kg/turn.
Re-tighten locking nut after setting force.
4.11.3 Opener Disc
Adjustments
Opener disc angle and stagger is not
adjustable, but disc-to-disc spacing is, and
may need attention as discs experience
normal wear. Spacers will need to be reset
when blades are replaced.
The ideal spacing causes the blades to be
in contact for about 25 mm. If you insert two
pieces of paper between the blades, the
gap between them should be 0 to 44 mm.
If the contact region is significantly larger
or smaller (or there is no contact at all), it
needs to be adjusted by moving one or more
spacer washers. If the contact region varies
with blade rotation, one or both blades is
likely bent and in need of replacement.
4. Adjustment / Operation
Figure 20. Row Unit Spring
Figure 21. Checking Disc Contact