Great Plains 606NT Operator Manual - Manual (Page 36)

32 3P605NT, 3P606NT, 605NT & 606NT Table of Contents Index Great Plains Manufacturing, Inc.
151-061M Table of Contents Index 2014-02-10
Coulter Down-Force
Refer to Figure 31
Coulter springs
are preset at:
10 in. (25.4 cm)
giving coulters an initial maximum operating force of
400 pounds (181 kg). This setting is adequate for many
difficult no-till conditions.
Machine Damage Risk:
Resetting coulter-spring length shorter than 9
3 ⁄
4
in. (24.8 cm)
inches may contribute to a premature failure of parts not
covered by warranty. If additional force is needed, add weights
to drill (page 30).
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 at
right.
1. Measure current spring length.
2. Loosen or remove jam nut .
3. Rotate adjust nut to set spring length.
4. Tighten set jam nut.
Drive Clutch Adjustment
(Models 606NT and 605NT only)
Refer to Figure 32
The main drive clutch
on a pull-type drill is a
mechanical-release, jaw-style design. You may need to
adjust the clutch for proper engagement and
disengagement.
When properly adjusted, the cam plates disengage the
clutch jaws completely when the drill is raised. When
lowered in field position, clutch jaws should be engaged.
To adjust, loosen bolts on clutch tab . Slide tab up or
down to change point at which cam plates meet. When
satisfied with adjustment, retighten bolts on clutch tab.
Figure 31
Coulter Spring Length
13990
Initial Vertical
Spring Length
Inches mm Pounds Kilograms
10 1/ 2 in. 267 mm 175 lbs. 79 kg
10 1/ 4 in. 260 mm 300 lbs. 136 kg
(f) 10 in. 254 mm 400 lbs. 181 kg
9 3/ 4 in. 248 mm 525 lbs. 238 kg
f. Factory setting.
32774J
Coulter Force
10.0 inches
25.4 cm
2
8
7
2
7
8
Figure 32
Drive Clutch
18482
1
2
3
1
2 3