Great Plains NTA2000 Operator Manual - Manual (Page 28)

26 NTA 2000 148-561M 2/2/2006
Great Plains Mfg., Inc.
Figure 28
Individual Coulter Mounting
Figure 29
Weight Brackets
Figure 30
Coulter Spring
Coulter Mounting Height
You can change the depth of individual coulters by adjust-
ing coulter-mounting height. If you adjust coulter height,
be sure to rebolt coulters vertically straight and correctly
spaced. To raise or lower individual coulters:
1. Loosen mounting clamps and adjust coulter to desired
height. Do not lower coulter spring bar below top U-
bolts on coulter clamp.
Refer to Figure 28
2. To re-tighten clamps. Snug hex-head clamp bolts (1)
just until U-bolts are tight on each side of spring bar.
3. Tighten nuts (2) on U-bolts.
4. Finish tightening hex-head clamp bolts (1).
NOTE: Even when coulter is held securely, there may be a
gap between clamp halves.
Coulter Down Pressure
Added Weight
Refer to Figure 29
In hard soil conditions where coulter penetration is limited,
you can add suitcase weights to brackets on the hitch
frame. The weight brackets are located on each side of the
drill fan. Adding weight on the hitch frame provides the
best weight distribution for no-till drilling.You can add up to
907kg (2000lbs) of additional weight. Place an equal
amount of weight on each weight bracket.
Coulter Springs
Refer to Figure 30
Coulter-spring length is preset at the factory to 254 mm
(10”), giving coulters an initial operating force of 181 kg
(400 lbs). This setting is adequate for many difficult no-till
conditions. For lighter no-till conditions where rocks or
other obstructions are a problem, you can reduce coulter
down pressure to give coulters better impact protection.
Refer to the following chart for adjusting coulter down
pressure.
NOTE: Do not reset coulter spring length shorter than 248
mm (9 3/4”). Shortening coulter springs more than 248
mm (9 3/4”) may contribute to premature failure of parts
and warranty will be voided.
10300
Spring Length Coulter Down Pressure
267 mm (10 1/2 in) 79 kg (175 lbs)
260 mm (10 1/4 in) 136 kg (300 lbs)
254 mm (10 in) 181 kg (400 lbs)
248 mm (9 3/4 in) 238 kg (525 lbs)
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