John Deere 520 Drawn Flail Shredder
Flail Shredders
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Features
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Cutting Width: 20 ft (6.1 m)
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PTO HP: 120 – 270 hp (90 – 201 kW)
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Number of Knives: 124 pairs
Specifications
Cutting capacity - Cutting height: |
7.6-25.4 cm 3-10 in. |
Cutting capacity - Cutting width: |
6.1 m 20 ft |
Dimensions - Transport length: |
Endwise; drawn 7.34 m 24.08 ft Integral 2.39 m 7.83 ft |
Dimensions - Transport width: |
Endwise; drawn 2.39 m 7.83 ft Integral 6.48 m 21.25 ft |
Dimensions - Weight: |
2,268 kg 5,000 lb |
Drivetrain - Belts: |
Kevlar, 3/5V heavy-duty |
Drivetrain - PTO drivelines: |
44.5 and 35.1 mm 1.75 and 1.38 in. |
Knives - Knife dimensions: |
7.87 x 63.5 mm 0.31 x 2.5 in. |
Knives - Knife mounting system: |
Bracket and D-ring |
Knives - Knives overlap: |
27.18 mm 1.07 in. |
Knives - Number of knives: |
248 side slicer (124 pairs) |
Knives - Tip speed: |
224 km/h 139 mph |
Knives - Type: |
Alloy steel, hardened with vanadium carbide and reversible |
Mainframe - Gauge wheels: |
4 (Drawn), 2 (Integral); infinitely adjustable |
Mainframe - Hitch: |
Drawn or Integral (Cat. 3 or 3N Quik-Coupler required) |
Mainframe - Safety deflector: |
Rubber deflector |
Mainframe - Warning lights: |
Integral (standard), drawn (optional) |
Optional equipment - Constant velocity joint driveline: |
Available |
Optional equipment - Easy transport: |
Available |
Optional equipment - Skid shoes: |
Available |
Power requirements - Tractor PTO hp range: |
Minimum 89 kg 120 hp |
Power requirements - Tractor RPM: |
1,000 rpm |
Rotor - Bearing size: |
42.86 mm 1.69 in. |
Rotor - Rotor bearing: |
Double-row, barrel-type, triple-sealed, 2-year warranty |
Rotor - Rotor diameter: |
Square rotor 17.8 x 17.8 cm 7 x 7 in. |
Rotor - Rotor speed: |
2,000 rpm |
Rubber deflectors will not dent or rust
Rubber deflectors
Serviceability
Lateral-bearing service access
Center-bearing service access
Hard-to-reach center bearings can be serviced with the conveniently located grease fittings at the rear of the machine:
- There is no need for the operator to crawl under the machine to perform this service task, thus increasing the probability of the job being performed and completed safely.
Drawn or integral model available to meet a variety of applications
Hitch
Drawn
Optional wheel supports eliminate uncut middle strip in non-row-crop field
Wheel supports
Optional wheel supports eliminate the uncut middle strip in crops like wheat, oats, and barley. The shredder can be pulled at an angle, offsetting the rotors and cutting evenly across the entire width of the machine.
Flail fastening system eliminates clogging from mud or crop residue
Flail fastening system
The flail fastening system eliminates clogging from mud or crop residue. Its bracket design also helps prevent knife and ring loss.
Heavy-duty John Deere-designed gearbox
Gearbox
A heavy-duty, John Deere-designed and John Deere-built gearbox transfers power to the Kevlar® drive belts through cross shafts with intermediate bearing supports:
- The transmission is bolted directly to the frame.
- This gearbox has a constant-duty rating of 180 hp and a maximum rating of 270 hp.
- It carries a limited two-year warranty.
Kevlar is a U.S.-registered trademark of E.I. du Pont de Nemours and Company.
Steel rotor bearings for increased bearing life
Rotor bearings
The rotor bearings are now made of steel and have a three-lip seal to keep the dirt out and increase the life of the bearings.
The side and center bearings now have guards in order to avoid leaks and dust, increasing the life of the bearings.
Square rotor designed for superior rotor strength
Rotor
Designed for superior rotor strength, the square rotor, together with the opposite-mounted flails, provides a machine with less potential vibration, increasing the life of rotor bearings and belts.
Since 248 knives are mounted on the full length of the rotors on the main cutterbar, with 2.5 cm (1 in.) of overlap, a stalk won't get missed. This is a significant improvement over the 216 knives mounted on the previous 220 Flail Shredder.