Rippled coulter blades cut through surface residue such as cornstalks, wheat stubble, or other heavy crops to help reduce plugging.
The ripple on the blade bites into the soil to promote turning the blade in wet and/or firm soil, as well as lighter, drier soils.
Cushion or shear-bolt designs are available.
Cushion design
Cushion-designed coulter blades
Automatically returns the coulter to the operating position once the obstruction is passed.
Saves time by eliminating the need to stop and replace shear bolts.
Unique rosette bracket used to adjust the coulter depth. Simply loosen one bolt and swing the coulter up or down to the desired height.
Standard does not move, so maximum trash clearance is retained.
Protector bolt (arrow) will yield if the obstruction height exceeds the deflection range of the coulter, thus preventing serious damage to the coulter.
457-mm or 508-mm (18-in. or 20-in.) rippled blades are available for good cutting action. The maximum working depth is as follows*:
For the 457-mm (18-in.) coulter blade, the working depth is 483 mm (19 in.)
For the 508-mm (20-in.) coulter blade, the working depth is 457 mm (18 in.)
*NOTE: When ripping in fields with obstructions, it is necessary to restrict the working depth in order to give the coulter space to travel over obstructions. Without coulters, the maximum working depth is 584 mm (23 in.) for shear-bolt standard and 559 mm (22 in.) for safety-trip and spring-reset standards.
Shear-bolt design
Shear-bolt design coulter blades
Provides economical alternative for protecting coulters in fields with few obstructions.
457-mm, 508-mm, or 559-mm (18-in., 20-in., or 22-in.) rippled coulter blades are available for good cutting action. The maximum working depth is as follows:
For 457-mm (18-in.) coulter blades, the working depth is 483 mm (19 in.)
For 508-mm (20-in.) coulter blades, the working depth is 457 mm (18 in.)
For 559-mm (22-in.) coulter blades, the working depth is 432 mm (17 in.)
The 915 V-Ripper has excellent residue-handling capability in primary tillage at all residue levels. At higher levels, coulters may be required to minimize plugging.
Typical percentage of residue cover remaining from the 915 are listed as follows.
NOTE: The percentage do not take into account variables such as the condition of the residue, speed, and soil type.
508-mm (20-in.) models
Starting residue cover (percent)
Remaining non-fragile* residue cover (percent)
Remaining fragile** residue cover (percent)
100
60
50
90
55
45
80
50
40
70
40
35
60
35
30
50
30
25
40
25
20
762-mm (30-in.) models
Starting residue cover (percent)
Remaining non-fragile* residue cover (percent)
Remaining fragile** residue cover (percent)
100
60
50
90
55
45
80
50
40
70
40
35
60
35
30
50
30
25
40
25
20
*Non-fragile residue includes crops like corn, sorghum, wheat (more than 45 bu).
**Fragile residue includes crops like soybeans, edible beans, peas, wheat, (under 45 bu), sunflower, peanuts, cotton.
The soil probe helps operators to determine the proper operating depth of their ripper points, 38 mm (1.5 in.) below the bottom of the compaction layer.
The probe allows obtaining the maximum amount of soil fracturing from the entire family of John Deere ripper points. Marked in 51-mm (2-in.) increments from 254 mm to 559 mm (10 in. to 22 in.), the probe provides accurate feedback of compaction layer depth.
It is stored on the mainframe of the ripper for convenient access. The operator's manual explains the proper use of the soil probe.
Coulters
Type
shear bolt or cushioned
Blades
Shear bolt: rippled blades: 45.7 cm 18 in. 50.8 cm 20 in. or 55.9 cm 22 in. Cushioned: rippled blades: 45.7 cm or 50.8 cm
Depth control
Option 1
Intergral units are controlled by tractor, rockshaft, and gauge wheels
Frame
Maximum underframe clearance
Shear-bolt: 90.2 cm 35.5 in. Cushion-trip: 95.3 cm 37.5 in. Safety-trip and spring-reset: 100.8 cm 39.7 in.
Hitch
Options
Integral
Three-point hitch requirements
Category 2,3 or 3N
Key Specs
Operating depth
Maximum 58.4 cm 23 in.
Working width
Option 1: 2.5 m, 8.33 ft Option 2: 3.2 m, 10.42 ft Option 3: 3.8 m, 12.5 ft Option 4: 3.6 m, 11.67 ft Option 5: 4.44 m, 14.58 ft Option 6: 5.3 m, 17.5 ft Option 7: 4.6 m, 15 ft Option 8: 5.72 m, 18.75 ft Option 9: 6.9 m, 22.5 ft Option 10: 5.59 m, 18.33 ft
Transport width
Option 1: 4.2 m, 13.75 ft Option 2: 4.2 m, 13.75 ft Option 3: 4.2 m, 13.75 ft Option 4: 5.36 m, 17.58 ft Option 5: 5.36 m, 17.58 ft Option 6: 5.36 m, 17.58 ft Option 7: 5.36 m, 17.58 ft; Or with extensions: 6.91 m, 22.67 ft Option 8: 5.36 m, 17.58 ft; Or with extensions: 6.91 m, 22.67 ft Option 9: 5.36 m, 17.58 ft; Or with extensions: 6.91 m, 22.67 ft Option 10: 5.36 m, 17.58 ft; Or with extensions: 6.91 m, 22.67 ft
Spacings
50.8 cm 20 in. 63.5 cm 25 in. 76.2 cm 30 in.
Operating depth
Maximum
58.4 cm 23 in.
Stabilizer/gauge wheels
Type
Gauge wheels
Tires
9.5L-15, 8PR
Wheels
12.7x17.8 cm 5x7 in.
Standard options
Spacings
50.8 cm 20 in. 63.5 cm 25 in. 76.2 cm 30 in.
Option 4
Trip force 1,451.5 to 2,404 kg 3,200 to 5,300 lb Standard type Parabolic Spring-reset rock standard
Option 1
Trip force 5,443 kg 12,000 lb Standard type Straight or parabolic with wear shin Shear-bolt
Option 3
Trip force 2,404 kg 5,300 lb Standard type Straight with wear shin or parabolic Cushion-trip
Option 2
Trip force 2,540 kg 5,600 lb Standard type Straight with wear shin or parabolic Safety-trip
Tool configuration
Type
V-Ripper
Option 11
Standard: 11, spacing: 63.5 cm 25 in.
Option 8
Standard: 9, spacing: 63.5 cm 25 in.
Option 9
Standard: 9, spacing: 76.2 cm 30 in.
Option 12
Standard: 13, spacing: 50.8 cm 20 in.
Option 2
Standard: 5, spacing: 63.5 cm 25 in.
Option 4
Standard: 5, spacing: 76.2 cm 30 in.
Option 7
Standard: 9, spacing: 50.8 cm 20 in.
Option 10
Standard: 11, spacing: 50.8 cm 20 in.
Option 1
Standard: 5, spacing: 50.8 cm 20 in.
Option 5
Standard: 7, spacing: 63.5 cm 25 in.
Option 6
Standard: 7, spacing: 76.2 cm 30 in.
Option 3
Standard: 5, spacing: 76.2 cm 30 in.
Transport width
Option 10
5.36 m 17.58 ft Or with extensions: 6.91 m 21.67 ft
Option 5
5.36 m 17.58 ft
Option 8
5.36 m 17.58 ft Or with extensions: 6.91 m 22.67 ft
Option 1
4.2 m 13.75 ft
Option 11
5.36 m 17.58 ft Or with extensions: 6.91 m 22.67 ft
Option 7
5.36 m 17.58 ft Or with extensions: 6.91 m 22.67 ft
Option 6
5.36 m 17.58 ft
Option 4
5.36 m 17.58 ft
Option 2
4.2 m 13.75 ft
Option 9
5.36 m 17.58 ft Or with extensions: 6.91 m 22.67 ft