Great Plains EWNT7 1523Q-1630Q Operator Manual - Manual (Page 25)

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23 4/25/06 Great Plains Mfg., Inc.
Section 4 Adjustments
EWNT7 and EWNT10 End Wheel No Till Drill 150-082M-A
Individual Opener & Coulter
When coulters and openers follow in tractor tire tracks
and individual coulters do not give satisfactory depth,
the coulter mounting bars can be lowered up to 1 1/2" by
loosening the mounting clamps and adjusting the coulter
and opener to the desired setting. Lowering openers and
coulters will not aid in penetrating hard soil. This is
achieved by adding weight to the drill. Refer to "Coulter
Down Pressure Requirements". To retighten the
clamps, snug the hex head mounting bolts until the u-
bolts are tight on each side of the spring bar. Tighten
nuts on u-bolts and then tighten hex head mounting
bolts.
Disk Opener Spring Pressure Setting
Refer to Figure 4-10 & Figure 4-11:
Each opener spring can be individually adjusted for
down pressure. This is useful when penetrating hard
soil and for seeding in tractor tire tracks.
To adjust the pressure, remove the "W" clip at the bottom
of the spring and place it in a higher hole in the spring
rod for more pressure, Figure 4-10, or in a lower hole for
less pressure, Figure 4-11.
The coulter spring length is preset at the factory to 10",
which gives the coulters an initial operating force of 400
pounds. This setting is adequate for many difficult no-till
planting conditions. For lighter no-till conditions where
rocks or other obstructions are a problem, it may be de-
NOTE: Transport clearance at these coulters will be
reduced in transport.
11836
10129
Minimum Pressure
Figure 4-11
Maximum Pressure
Figure 4-10
sirable to reduce the initial coulter preload to give the
coulters better impact protection. Refer to the following
chart for adjusting the initial coulter force setting.
Individual Opener Height
Refer to Figure 4-12:
The opener depth may be adjusted at each opener.
Openers running in the tractor tire tracks, for example,
may require depth or down pressure adjustments.
The opener depth adjustment is made where the spring
bar connects to the top of the disk opener arm,
Figure 4-12. Connect the spring bar in a higher hole for
deeper opener location, or in a lower hole for a more
shallow opener location.
Spring Length Initial Vertical Coulter Force
10 1/2" 175 lbs.
10 1/4" 300 lbs.
10" 400 lbs.
9 3/4" 525 lbs.
NOTE: Any attempt to reset the coulter spring length
shorter than 9 3/4" may contribute to premature fail-
ure of parts and warranty shall be voided.
10118
Spring Bar Adjustment
Figure 4-12
NOTE: Transport clearance at the openers will be
reduced.