Operators are requiring faster field working speeds and larger implements and tractors because of a dramatic increase in farm size. The market is asking for and receiving tractors with more torque, more weight, and more horsepower. This increased draft requires more from the implement frame and hitch components.
Frames and hitches have been redesigned with increases in frame tube thickness, additional diagonal bracing, and frame gussets for 600 engine horsepower requirements.
As part of the redesign, implements include a beefy Category 5 implement hitch link, providing the necessary strength and dimensions to match a Category 5 tractor drawbar and associated load.
The drawbar pin is increased from 51 mm (2 in.) with Category 4 to 70 mm (2.75 in.) with Category 5. The hitch link thickness is increased from 47 mm (1.85 in.) with Category 4 to 58 mm (2.28 in.) with Category 5.
The addition of this option will satisfy tractor Category 5 drawbar requirements.
Compatibility
The Level-lift hitch/turnbuckle:
A single 152-mm x 254-mm (6-in. x 10-in.) hitch tube enables tighter turns on the headlands without the inside tractor dual interfering with the hitch tube.
The turnbuckle is used to adjust fore-aft leveling:
The turnbuckle-adjustment wrench is in base equipment:
The industry-exclusive hydraulic rolling baskets found on the 2600 series disks and vertical tillage are also available on the 2720 Disk Ripper. The baskets come in a round-bar or knife-edge configuration.
Below are the benefits of each basket:
The rolling baskets can be set in three different positions based on their hydraulic operation:
Down pressure should always be set using the gauge and operated from the cab.
NOTE: Rolling baskets are not available on the 7-standard narrow transport model.
Contact a John Deere dealer for more information on Round-bar rolling baskets and Knife-edge rolling baskets.
The 2720 disk gangs use field-proven gang components from the 2600 Series Disks for excellent reliability and performance. Disk gangs provide the following:
C-spring standards protect the gangs from obstacles. Sealed maintenance free bearings prevent foreign material from getting into the bearings, thus ensuring long life. The bearings come with a two-year warranty.
The 2720 disk gang also features a floating scraper that is now mounted to the gang instead of to the gang tube. This allows the scraper to stay in constant contact with the blade when the gang side-loads in harsh conditions allowing for increased residue flowing capability.
The 610-mm x 7-mm (24-in. x 0.256-in.) solid spherical low-concavity disk blades are spaced at 279 mm (11 in.) for sizing residue and to ensure residue flows well through spring tillage tools.
The 660-mm x 7-mm (26-in. x 0.256-in.) solid spherical low-concavity disk blades are spaced at 279 mm (11 in.) for sizing residue and to ensure residue flows well through spring tillage tools.
NOTE: Pieces are not sized so small they deteriorate quickly, blow away easily, or are buried readily, and yet are small enough to flow through a field cultivator.
Crank-adjust single-point depth control is easily accessible from the front of the machine. This convenient performance feature:
TouchSet™ depth control for 7R (infinitely variable transmission only), 8R, and 9R Series Tractors is available as an attachment.
Typical percentages of residue cover remaining from the 2720 Combination Ripper are listed in the table. These percentages do not take into account variables such as the conditions of the residue, speed, and soil type.
NOTE: Percentages assume disk gangs are operating at 152 mm (6 in.) of depth.
Starting | Remaining non-fragile* | Remaining fragile** | ||
57 mm (2.25 in.) | 178 mm (7 in.) | 57 mm (2.25 in.) | 178 mm (7 in.) | |
100 | 40 | 35 | 15 | 12 |
90 | 36 | 32 | 14 | 11 |
80 | 32 | 28 | 12 | 10 |
70 | 28 | 25 | 11 | 8 |
60 | 24 | 21 | 9 | 7 |
50 | 20 | 18 | 8 | 6 |
40 | 16 | 14 | 6 | 5 |
The 2720 offers increased weight per blade over the 512 to penetrate rock-hard soils and deliver up to 203.2 mm (8 in.) of blade working depth to bury residue. The chart below details the weight per blade of the 2720 with and without a basket versus the 512.
Model/Size | 5 standard | 7 standard (folding) | 7 standard (non-folding) | 9 standard | 11 standard |
512 | 288 | 272 | 279 | 333 | Not applicable |
2720 without baskets | 359 | 372 | 345 | 439 | 421 |
2720 with baskets | 392 | Not applicable | 410 | 474 | 456 |
The 2720 achieves increased weight per blade over the 512 because of the following:
*Non-fragile residue includes crops like corn, sorghum, and wheat (more than 45 bu).
**Fragile residue includes crops: soybeans, edible beans, peas, wheat (less than 45 bu), sunflower, peanuts, and cotton.
2720 Disk Ripper configuration | Tire option codes | Base or optional | Tire option description | Option codes for finishing components | Description of finishing components |
3.8 m (12.5 ft) 5 Standards 28 disk blades | 4510 | In base price | Walk-Over Tandem Wheels 57.2 mm (2.25-in.) Diameter Plug-in Spindles and 6 bolt hubs - Four 11L-15 FI D LR Tires | --- | --- |
4512 | Optional | Walk-Over Tandem Wheels 57.2 mm (2.25-in.) Diameter Plug-in Spindles and 6 bolt hubs - Four 11L-15 FI F LR Tires | 6040 | Round bar rolling basket | |
6041 | Knife edge rolling basket | ||||
4518 | Optional | Walk-Over Tandem Wheels 57.2 mm (2.25-in.)Diameter Plug-in Spindles and 8 bolt hubs - Four 340/65R18 Goodyear® Tires | 6040 | Round bar rolling basket | |
6041 | Knife edge rolling basket | ||||
5.4 m (17.5 ft) | 4512 | In base price | Walk-Over Tandem Wheels 57.2 mm (2.25-in.) Diameter Plug-in Spindles and 6 bolt hubs - Four 11L-15 FI F LR Tires | 6040 | Round bar rolling basket |
6041 | Knife edge rolling basket | ||||
4518 | Optional | Walk-Over Tandem Wheels 57.2 mm (2.25-in.) Diameter Plug-in Spindles and 8 bolt hubs - Four 340/65R18 Goodyear Tires | 6040 | Round bar rolling basket | |
6041 | Knife edge rolling basket | ||||
6.9 m (22.5 ft) | 4518 | In base price | Walk-Over Tandem Wheels 57.2 mm (2.25-in.) Diameter Plug-in Spindles and 8 bolt hubs - Four 340/65R18 Goodyear Tires | 6040 | Round bar rolling basket |
6041 | Knife edge rolling basket | ||||
4520 | Optional | Walk-Over Tandem Wheels 57.2 mm (2.25-in.) Diameter Plug-in Spindles and 8 bolt hubs - Four 340/65R18 Michelin™ Tires | 6040 | Round bar rolling basket | |
6041 | Knife edge rolling basket | ||||
8.4 m (27.5 ft) 11 Standards 66 disk blades | 4518 | In base price | Walk-Over Tandem Wheels 57.2 mm (2.25-in.) Diameter Plug-in Spindles and 8 bolt hubs - Four 340/65R18 Goodyear Tires | --- | --- |
4520 | Optional | Walk-Over Tandem Wheels 57.2 mm (2.25-in.) Diameter Plug-in Spindles and 8 bolt hubs - Four 340/65R18 Michelin Tires | 6040 | Round bar rolling basket | |
6041 | Knife edge rolling basket |
NOTE: The option code 6095 included in the base price of the ripper. Option 6095 is listed under the finishing components and is less round rolling basket.
Walk-Over tandem wheels provide added support and stability for smoother operation in the field.
The wheels are located behind the front disk gangs and in front of the ripper shanks. This allows the wheels to run on ground that has been leveled by the front disk gangs for more stable operation.
Goodyear is a trademark of Goodyear Rubber and Tire Company. Michelin is a trademark of Michelin North America, Inc.
The 2720 Combination Ripper uses the disk-shank-disk configuration (DSD). In the DSD configuration, the ripper standards are located between the disk gangs instead of behind them (or DDS) as some competitors use.
With the shanks at the rear of the machine, the shanks can leave large ridges and valleys.
John Deere's 2600 Series Disks provide an innovative approach to tension disk gang bolts.