Great Plains V-300F Operator Manual - Manual (Page 31)

6/29/2006 148-057M
29 Adjustments
Pre-emergence Marker Adjustment
There are two marker adjustments that can be made to
adjust pre-emergence markers.
Disk Adjustments
Loosen two 1/2-inch carriage bolts (5) holding disk mount.
Rotate disk mount as desired.
If marker disc is not square with the ground when marker
is lowered in the field, change disk angle relative to
ground. Loosen 1/2-inch bolts (4) and rotate marker
mount until marker disk is square with ground.
Lateral Marker Adjustment
To adjust markers to the left or right, remove four 7/16-
inch bolts (2) holding pre-emergence marker mount weld-
ment (1) to walkboard. Loosen 1/2-13 x 3 1/32 x 4 u-bolts
(3) securing weldment (1) to mount tube. Adjust
accordingly.
Reattach weldment to walkboard using 7/16-bolts (2). Re-
tighten 1/2-13 x 3 1/32 x 4 u-bolts (3).
Marker Adjustments
Folding Speed
Refer to Figure 27
Adjust folding speed with hex adjustment screws on the
sequence-valve body. There is one adjustment screw for
raising speed (1) and one for lowering speed (2). Identify
adjustment screws by markings stamped in valve body.
With tractor idling at a normal operating speed, adjust
marker folding to a safe speed.Turn adjustment screws
clockwise to decrease folding speed and counterclock-
wise to increase folding speed. Excessive folding speed
could damage markers and void the warranty.
After adjusting the folding speed, tighten jam nuts on hex
adjustment screws to hold settings.
Disk Adjustments
Refer to Figure 28
If mark left by marker disk is not easy to see, change disk
angle to make a wider mark. Loosen two 1/2-inch carriage
bolts (1) holding disk mount. Rotate disk mount as
desired.
If the marker disk is not square with the ground when the
marker is lowered in the field, or if marker arm tends to
fold up while lowered in the field, change disk angle rela-
tive to ground. Loosen 1/2-inch bolts (2) and rotate marker
mount until marker disk is square with ground.
To adjust where the disk marks, loosen u-bolt (3) and slide
marker-mount tube in or out as necessary. Re-tighten u-
bolt.
14048
Figure 27
Speed Adjustment Sequence Valve
Figure 28
Disk Angle
15667
24468
Figure 26
Pre-emergence Marker Adjustment