Great Plains YP925TD Operator Manual - Manual (Page 49)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 45
02/23/2011 Table of Contents Index 401-755M
Coulter Depth
Refer to Figure 33
Set coulter depth prior to first planting. Suggested
depth
is 6 mm deeper than planting depth. See
page 54 for planting depth.
Suggested shank length is:
23 cm
for a normal field tool bar height of:
66 cm,
and a typical coulter depth of:
10 cm.
When crops or field conditions change, review the
coulter depth and adjust it as needed.
Coulter blades wear. Inspect blades regularly. Lower the
coulters to compensate for wear. If a shank cannot be
further adjusted to compensate for wear, replace the
blade.
New blade disks have a nominal diameter of:
51.6 cm.
When the diameter of a blade disk is worn to:
37 cm,
replace the blade.
To adjust coulter depth:
• Mark the coulter shanks for the new depth desired.
• Raise the planter and install transport locks (page 20).
• Loosen jam nuts and set screws at the tool bar.
• Slide the shank up or down as needed. Tighten nuts.
Coulter Blade Angle
Refer to Figure 34
For fields where frequent sharp turns are unavoidable,
you can reduce coulter plowing by allowing the coulters
to caster at the pivot casting. Loosen the jam nuts at
.
Loosen the set screws just enough to allow the casting
to swivel. Re-tighten the jam nuts. Do not remove the
center stop screw
.
Coulter to Row Alignment
The factory configuration sets coulters to run in “zone”
mode, in between the outside and center openers of
each triple. To adjust for other alignments, loosen the
mounting bolts
, and re-position the coulter mount.
Coulter Blade Style
Coulter blades are available in two styles:
• fluted, with radial waves, and;
• turbo, with waves tangent to the hub.
To change blade styles, order replacement blades. See
“51 cm (20in) Coulter Blades” on page 98.
Figure 33
Coulter Depth
31919
1
6
8
7
1
9
8
6
7
8
1
Figure 34
Coulter Blade Angle / Alignment
31874
2
2
3
1
4 1
2
3
4