Great Plains LC40 Operator Manual - Manual (Page 33)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 29
2014-07-21 Table of Contents Index 591-049M
Coulter Adjustments
Coulter or Tire Height
Refer to Figure 22 (a cutaway view of the coulter row)
Coulter or tire height
is the adjustment for tool depth
(lister shovel or cultivator).
A crank , found on a stob at the rear center of the tool
bar, is provided to make the adjustment.
A scale bar provides reference graduations. The front
edge of the bar has major graduation reference marks
“1” to “5”, with an edge notch every
1 ⁄
2
graduation. The
rear edge of the bar has notches at the
1 ⁄
4
graduations,
but no reference marks. The reference point for the scale
is the top face of the pivot plate
.
Each
1 ⁄
2
number graduation represents approximately
1 inch (2.5 cm) of vertical coulter movement. “1” is
deepest. “5” is shallowest.
Note: Never adjust the coulter beyond mark “5”. The
adjuster separates at settings shallower than “5”.
The coulter/tire arm adjustment plates have two pivot
holes, providing an additional range of adjustment.
To adjust coulter/tire height:
1. Raise the implement. Coulter/tire adjustment can be
made with the implement lowered, but requires more
effort. Release the crank from storage.
2. At a row, note the current setting on the scale .
Each
1 ⁄
2
number graduation represents
approximately 1 inch (2.5 cm) of vertical coulter
movement.
3. Remove the wire-retained pin .
4. Place the crank on the threaded rod . Rotate the
crank until the desired scale value appears at the top
face of the pivot plate
. Adjust crank to align the pin
hole in the thread rod with the slot in the scale.
5. Re-install the wire-retained pin.
6. Re-check tool depth, arm parallelism and hitch
height, then repeat step 3 through step 5 for all rows.
Note: The threaded rod may only be pinned at half turns
(180
°). Each half turn is 1 ⁄
12
of a major graduation
(6 full turns per major graduation).
Equipment Damage Risk:
Do not use scale values below “1” or above “5”, or pin
and/or scale damage may result.
Figure 22
Coulter/Tire Height Adjustment
34867
2
4
6
7
1
3
5
1
2
3
4
5
3
6
7
4