Great Plains NTA1300 Operator Manual - Manual (Page 27)

25 5/26/2006 NTA 1000 and NTA 1300 148-528M
Great Plains Mfg., Inc. Adjustments
Figure 31
Tine Angle For No-Till Drilling
Figure 32
Harrow Adjustment
Figure 33
Leaf Spring Adjustment
Harrow Adjustment
Refer to Figure 31
The illistration shows a successful harrow position for
no-till conditions. Because of different soil moisture,
trash levels and trash types, you may need to reposi-
tion the tube frame or tines. Initially position the frame
and tines as shown, then readjust as necessary.
Refer to Figure 31
1. To adjust the frame, loosen the eight hex nuts (1)
on the u-bolts and rotate the frame tube (2) as
necessary.
Refer to Figure 32
2. To adjust the tines, loosen the 1/2-inch hex nuts
(3) on the 1/2-inch u-bolts that attach the tine
tubes to the harrow frames . Rotate tine tubes (4)
so the tines are against the stop bushings and are
angled back as necessary. Re-tighten hex nuts
on u-bolts.
Leaf Spring Adjustment
Refer to Figure 33
A leaf spring is located just ahead of the vertical pivot.
The spring is designed to provide just enough force to
keep the hitch square and stable for turning at field
ends and to add stability for drilling in rough field con-
ditions. Proper leaf-spring adjustment is important for
smooth implement operation.
To adjust properly, square tongue with transport
frame and adjust 3/8-inch u-bolts (1) on each side
until leaf-spring rollers (2) just make contact with roller
pads (3) on transport frame. Make sure both right and
left sides are adjusted equally.