GREAT PLAINS SPARTAN II, Operator'S Manual, Page: 69 / 131

Great Plains | 166-486M | 2020/10/08 62
Spartan
II
607 Table of Contents Index Operation

Frame-Mounted Coulters
Frame-mounted coulters are used in-row and
prepare the soil directly ahead of the seed furrow.
The factory suggested default setting with new
coulter blades at 3.8 cm opener (planting) depth (A),
is a coulter depth (B) of 5.1 cm, or 13 mm below
opener depth.
Frame-Mounted Coulter Adjustments
There are several frame-mounted coulter
adjustments:

Frame height directly controls the group coulter
depth (B).
If the center frame is not running at the correct
height, coulter depth is also incorrect. See
“
Adjusting Tool Bar Height ” on page 57.
Wing frame height is controlled by the center
frame height, and is affected by wing weight
transfer.
See “
Wing Weight Transfer
Adjustment ” on page 59.
 A few individual rows may be lowered by
loosening the nuts (1) at the tool bar u-bolts,
sliding the spring bar (2) down and tightening the
nuts. Do not lower more than about 2.5 cm Keep
the top edge of the spring bar at or above the top
of the upper bolt holes.
 Individual coulter down-force is a spring
adjustment for rows in tracks, or all rows - in
unusually light or heavy no-till conditions.

Coulters are factory aligned so that the coulter
disk prepares the furrow directly ahead of the
opener disks.
After any coulter or row maintenance, check that
these components are still aligned. Adjust at the
coulter mounting clamp on the tool bar. Check
coulter height again if any adjustments are made.
In regular or heavy no-till conditions, adjust opener
depth to set the coulter depth to about 13 mm deeper
than seeding depth.
In addition to checking depths at setup, be sure to
check actual seeding results while planting.
Replace the 432 mm coulter blades when the
diameter is less than 400 mm.
Frame-Mounted Coulter Force
In normal operation at target running depth, the
spring is at full extension or only slightly compressed.
It compresses briefly as obstructions and denser soil
are encountered.
Coulter springs are set to 181 kg. In normal operation
at target running depth, the spring is at full extension.
It compresses briefly as obstructions are
encountered.
 In heavy no-till conditions, the springs may be in
compression most of the time. This means that
the blades are not reaching the desired coulter
depth. If drill weight is available, increase the
spring down-force to compensate.

In light, rocky conditions, the factory spring
setting may be higher than needed. Extend blade
life by reducing the force at which the blades ride
up over obstructions.
B
A
31196
1
2
29353