Great Plains NP30A 30-foot Operator Manual - Manual (Page 102)

98 NP30A or NP40A Table of Contents Index Great Plains Manufacturing, Inc.
407-502M Table of Contents Index 2014-05-20
Sealer Down Pressure
Factory setting is the front hole. Additional sealer
down-force is available by moving the spring adjustment
weldment
to the rear. To change:
a. Lower the applicator until the sealer wheels or disc
are in ground contact, and the arms are lifted above
both down-stop holes
. Remove down stop pin.
b. Raise applicator until springs are fully compressed
and loose at adjustment weldment
.
c. Remove spring adjustment pin . Slide weldment
to new position. Re-pin and cotter. Place spring ends
on weldment pins.
d. Lower applicator to raise arm above down-stop
holes. Re-insert down-stop pin and its cotter.
Sealer Tilt
This adjustment is to compensate for large changes in
sealer height, which can cause undesired changes in
sealer arm angle.
To adjust, raise and lock-up the applicator. Remove the
upper height adjustment pin
. Swing the mount to the
new position and re-pin.
Sealer Height
Check and adjust this when changing knife depth.
The recommendation is to keep the vertical tube near
vertical and the arm level at the new knife depth.
To adjust, remove both adjustment pins . Slide the tube
up or down, ad re-pin.
Sealer Disc/Wheel Spacing
Spacing and angle have the most effect on trench
closing and berm control. Adjusting one may require
adjustments to the other.
To change spacing, remove both bolts , reposition the
disc or wheel arm, and re-install bolts.
Sealer Disc/Wheel Angle
Angle and spacing have the most effect on trench closing
and berm control. Adjusting one may require
adjustments to the other.
Note: Wheel arms have 3 holes. Disc arms have 5.
Factory setting is the center hole in both cases.
To change angle, remove the outer bolt , loosen the
inner bolt . Reposition the disc or wheel arm. Re-install
bolt and re-tighten bolt . The factory setting is with
the inner pivot bolt in the 3rd hole from sealer center.
Sealer Disc Direction
This applies to disc sealers only. To change the direction
of throw, dismount the disc from the hub. Invert and
re-mount it.
Figure 83
Basket Sealer Adjustments
31702
2
3
4
1
8
2
8
1
8
2 8
3
4
4
4
5
5
6
6
5
6 5
7