Posted: January 1st 2015 @ 7:50 AM in John Deere Equipment
2720 and 2730: Ripper right choice  
Both the 2720 and the 2730 Rippers are primary tillage tools capable of meeting customers' requirements of greater productivity during small tillage windows to prepare the preferred soil environment to help plants reach their maximum yield potential. These tillage tools require a similar range of horsepower requirements, but vary in specifications, performance, and price point.

Key factors to consider:
 
  • Residue levels

  • Crop rotation

  • Field finish

  • Soil type

  • Soil conditions

  • Moisture levels

  • Tractor size

  • Size of operation

  • Tillage window

 
Comparative overview
 
2720 Disk Ripper
2730 Combination Ripper
Comparison of working widths
 

Productivity

Working width 2720

Working width 2730

Compaction

762-mm (30-in.) Ripper shank spacing

609-mm (24-in.) Ripper shank spacing

Ripper Shank

5-shank rigid

7-shank rigid

7-shank narrow

9-shank folding

11-shank folding

7-shank rigid

9-shank rigid

9-shank folding

11-shank folding

13-shank folding

Working widths

3.8 m (12.5 ft)

5.3 m (17.5 ft)

5.3 m (17.5 ft)

6.9 m (22.5 ft)

8.4 m (27.5 ft)

4.3 m (14 ft)

5.5 m (18 ft)

5.5 m (18 ft)

6.7 m (22 ft)

7.9 m (26 ft)

NOTE: The chart above includes specifications for the working widths. Customers are advised to also consider the transportation dimensions, tractor size, operation size, and tillage window when choosing the ripper model best suited for their needs.

Specifications
 

Considerations

Specification

2720

2730

Soil conditions

Disk configuration

Disks Rippers disks

Disks ahead of Rippers

Operation in rocky soil conditions

Blade options

Gang

Individual and gang

Remaining residue levels

Blade size

609 mm (24 in.)

675x6 mm (26 in.)

Soil type/moisture: residue sizing

Blade spacing

279 mm (11 in.)

Individual: 457 mm (18 in.) Gang: 279 mm (11 in.)

Residue incorporation

Gang angle

Front: 18 degree Rear: 14-16 degree

Front: 18 degree Rear: 18 degree

Crop rotation

Maximum blade working depth

Up to 152 mm (6 in.)

Up to 203 mm (8 in.)

Field finish

Finishing attachments

Round bar basket, knife edge basket, less

Round bar basket, knife edge basket, coil tine harrow, less rear

Ease of operation

Operational areas

Ripper shanks; baskets

Ripper shanks; baskets; front disks; closing disks

Horsepower requirements

Engine horsepower

26-37 kW (35-50 hp) per shank

26-41 kW (35-55 hp) per shank


Additional ripper model specifications can be accessed using the following links: 2720 specs and 2730 specs.
 
Key value propositions for 2720

2720 Ripper video

The 2720 has the ability to position the disks independently from the ripper shanks set at 762 mm (30 in.) to minimize plugging and reduce horsepower and fuel requirements. The disk-ripper-disk configuration allows the front gangs to bury residue. The ripper shanks shatter compaction up to 406-mm (16-in.) deep. The rear disk blades level soil, providing additional soil and residue incorporation. The hydraulically adjustable rolling baskets help break up clods to leave the preferred field finish.

Key value propositions for 2730

2730 Ripper video

The 2730 integrates four operational areas into one system, reducing overall tillage system costs and increasing asset utilization. The 2730 features independent hydraulic adjustability of disks, ripper shanks, closing disks, and leveling attachments. Superior residue flow is achieved with 1270 mm (50 in.) of ripper shank fore-aft spacing. To fully fracture compaction layers, the shanks are set at 610-mm (24-in.) side-to-side spacing. With under frame clearance of 953 mm (37.5 in.) and an overall machine length of 13 m (42.5 ft), the 2730 delivers nearly plug-free operation.

Common applications
 
  • For a customizable field finish, both the 2720 and 2730 are available with either knife-edge or round-bar baskets that can be operated with constant active hydraulic down pressure in float or raised completely off the ground. These settings are hydraulically adjusted from in the cab, and changes can be made on-the-go. Additionally, both machines can be ordered less leveling attachments, and a coil tine harrow is available with the 2730.
  • Single point depth control accurately sets ripper point depths up to 406 mm (16 in.) deep.
  • Both machines deliver on customer needs of higher performance with larger operating widths, increased uptime, maintenance-free components, fewer grease points, larger, durable tires, and a lower cost of operation through machines that prepare the soil for one secondary seedbed preparation pass.
 
Productivity
 
2720 Disk Ripper
2730 Combination Ripper
Key value propositions for 2720

While both machines have similar horsepower requirements, the 2720 will demand less horsepower. The horsepower rating for the 2720 is between 26 to 37 kW (35 to 50 hp) per shank, and the operating speed range is between 8 to 11 km/h (5 to 7 mph). This means a 5- or 7-shank 2720 can be pulled with something similar to a John Deere 8R Series tractor. In most situations, the 2730 models will generally require a tractor comparable to a John Deere 9R Tractor Series.

Key value propositions for 2730

To accomplish all of the functionality the 2730 delivers in one pass, it comes with a need for horsepower. The robust frame, larger disk blades that can work up to 203 mm (8 in.) deep, and extra built-in disk width is going to take 26 to 41 kW (35 to 55 hp) engine hp per shank. Additionally, up to five selective control valves (SCVs) and 17,237 kpa (2500 PSI) is required for the folding models when the rolling basket is equipped. The 2730 is designed for 8 to 11 km/h (5 to 7 mph) operating speeds.
 
Residue management
 
2720 gang blades
2730 individual blades
Customer value

Both the 2720 and 2730 are primary tillage tools designed to manage high residue levels and flow soil for one secondary pass seedbed preparation.

Key value propositions for 2720

The 2720 Disk Ripper is designed with the front gangs set ahead of the shanks at an 18-degree angle. The rear gang positioned behind the shanks can be set at 16 degrees for more aggressive disking or may be adjusted to 14 degrees for very light soils and minimal residue conditions. The 2720 is designed to leave as much as 30 to 45 percent residue coverage on the surface.

Key value propositions for 2730

The large 674-mm (26-in.) 2730 disk blades are set ahead of the ripper shanks and can be hydraulically adjusted in cab to be raised completely out of the ground. The ability to independently adjust the front disks based on varying conditions allows the operator to optimize desired residue sizing and mixing.

The disks are available in either individual disk blades or in a gang-type configuration. The front and rear blades are set at an 18-degree angle on either 460-mm (18-in.) spacing for individual blades or 280-mm (11-in.) spacing for gang blades to provide an aggressive disking action up to 203-mm (8-in.) depths. The 2730 is designed to reduce residue by up to 60 to 80 percent.
 
Summary
 
2720 in corn stalks
2730 in corn stalks
 

 

Key differences for 2720
 
  • Larger working width of 8.4 m (27.5 ft) (Performance)
  • Fewer moving parts (Uptime)
  • Less horsepower and fuel usage (Cost of Operation)
  • Ripper shank side-to-side spacing of 762 mm (30 in.)
  • Gang mounted 610-mm (24-in.) disk blade with 280-mm (11-in.) spacing
  • Adjustable rear disk gang angle of 14 to 16 degrees
 

 

Key differences for 2730
 
  • Closing disks behind shanks for level field finish (Performance)
  • Individually mounted 660-mm (26-in.) disk blades with 457-mm (18-in.) spacing for operation in wet soil conditions and rocky fields (Uptime)
  • Independent hydraulically adjustable disks, ripper shanks, closing disks, and leveling attachments for a customized field finish (Cost of Operation)
  • Gang mounted 660-mm (26-in.) disk blades with 280-mm (11-in.) spacing
  • Ripper shank side-to-side spacing of 610 mm (24 in.) to reduce compaction
  • Ripper shank fore-aft spacing of 1270 mm (50 in.) for soil and residue to flow

Additional resources
  • Ag sales manual 2720
  • Ag sales manual 2730
 
 
Effective Date : 12-Dec-2014
Product features are based on published information at the time of publication and are subject to change without notice. All
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Engine horsepower and torque information for non-Deere engines are provided by the engine manufacturer for comparison purposes only.
Actual operating horsepower and torque will be less. Refer to the engine manufacturer's Web site for additional information.
 
   
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