Great Plains NTA2007 Operator Manual - Manual (Page 105)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 101
2012-01-05 Table of Contents Index 166-372M
Marker Speed
There is one adjustment screw for unfolding speed
and one for folding speed
. You can identify adjustment
screws by markings stamped in valve body. The screw
marked “Raise” controls the folding speed. The screw
marked “Lower” controls unfolding speed.
Turn adjustment screws clockwise ( : slower) to
decrease [un]folding speed and counter-clockwise
(
: faster) to increase [un]folding speed.
With tractor idling at a normal operating speed, adjust
marker folding to a safe speed. Excessive [un]folding
speed could damage markers and void the warranty.
After adjusting the folding speed, tighten jam nuts on hex
adjustment screws to hold settings.
Marker Disc Adjustment
There are four adjustments for marks:
Refer to Figure 86
1.
Loosen the nuts securing the guard and
bracket . Change the angle of mark by shifting the
bracket, which has slotted holes. Re-align the guard
with the disc edge. Tighten the nuts. Re-check
marker extension.
2. For a larger change in mark angle, the bracket has a
choice of small slotted holes on one side. Loosen
both nuts. Remove the bolt on the two-hole side. Re-
insert the bolt in the alternate hole. Re-align the
guard with the disc edge. Tighten the nuts. Re-check
marker extension.
3. Mark visibility may be enhance by inverting the
disc
on the disc axle. Remove the outer axle nuts
(not shown). Invert the disc and depth gauge. Re-
secure with nuts.
Pass Overlap or Excess Gap Risk:
Check marker extension after adjusting. These adjustments
may cause minor or major changes to marker extension, which
could result in incorrect gaps between passes, or pass
overlaps.
1 2
F
S
S
Figure 85
Sequence Valve Adjustment
14048
1
2
S
F
Figure 86
Left Mark Adjustments
31199
4
6
7
5
Sharp Object Hazard:
Marker discs may be sharp. Use caution when making
adjustments in this area. If removed, always re-install guard
above marker disc. 4 5
6
7