Great Plains NTA2000D Operator Manual - Manual (Page 31)

29 9/13/2006 NTA 2000D 148-632M
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
2000lbs (907kg) 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 to10” (254
mm), giving coulters an initial operating force of 400
pounds (181 kg). 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 pro-
tection. Refer to the following chart for adjusting coulter
down pressure.
NOTE: Do not reset coulter spring length shorter than
9 3/4” (248 mm). Shortening coulter springs more than
9 3/4” (248 mm) may contribute to premature failure of
parts and warranty will be voided.
10300
Spring Length Coulter Down Pressure
10 1/2 in (267 mm) 175 lbs (79 kg)
10 1/4 in (260 mm) 300 lbs (136 kg)
10 in (254 mm) 400 lbs (181 kg)
9 3/4 in (248 mm) 525 lbs (238 kg)
19884
13990