Great Plains 1006NT Operator Manual - Manual (Page 26)

706/1006NT
150-285M 1/3/07
24
Coulter Down Pressure
Weights
If more weight is required for your soil conditions,
add weights to weight brackets located on box
frame. No more than 1100 pounds for the 706
(550 pounds per side) and 1500 pounds for the
1006 (750 pounds per side) should ever be add-
ed. Add an equal amount of weight to each end of
drill. See Table 1.
Refer to Figure 13
Spring Length
Coulter springs are preset at 9 7/8 to 10 inches,
giving coulters an initial operating force of 400
pounds. This setting is adequate for many difficult
no-till conditions.
IMPORTANT: Resetting coulter-spring length
shorter than 9 3/4 inches may contribute to
premature failure of parts and warranty will be
voided. If additional force is needed, add
weights to drill.
For lighter no-till conditions where rocks or other
obstructions are a problem, you can lengthen
coulter springs to protect coulters from impact.
Refer to Table 2.
Individual Coulter Adjustment
Individual coulters can be lowered if coulters fol-
low in tractor tire tracks and do not give
satisfactory depth. To do so:
1. Loosen 5/8 inch jam nuts on 5/8 inch square
head set screws. Then loosen set screws.
2. Lower coulter to desired depth.
3. Tighten set screw on side of coulter clamp
first. This squares coulter bar in clamp.
4. Tighten set screw on front of coulter clamp.
Then tighten both 5/8 inch jam nuts on each
set screw.
NOTE: Torque 5/8 inch set screws 85-100 ft-lbs to
obtain adequate holding force.
Pounds Per Coulter
7 inch 7.5 inch 8 inch
Empty Drill 274 282 290
Drill with 300
pounds added
304 314 323
Drill with 600
pounds added
334 345 356
Table 1
Weight Chart
Figure 13
Coulter Spring Length
20482
Table 2
Spring Length Chart
Spring
Length
Initial Vertical Coulter Force
10 1/2 inches 175 pounds
10 1/4 inches 300 pounds
10 inches 400 pounds
9 3/4 inches 525 pounds