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John Deere
390
Flail Mowers and Shredders

John Deere 390

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Side-Slicer and Smooth-Cut Knives

The mower comes with heat-treated side-slicer knives for tough conditions. Optional smooth-cut knives, ideal for grassy conditions, add versatility. Each knife type is designed for durability and efficiency, with resharpening options for prolonged life.

Close-up of the underside of a green flail mower showing a row of hanging flail blades mounted along a rotating drum
Heavy-Duty Hood and End Plates

Constructed for durability, the hood is 0.2 in. (0.48 cm) thick to resist damage. The end plates provide structural integrity. A full-length torque tube helps prevent twisting on uneven ground for stable performance.

Green John Deere 360 Flail Mower attachment shown from a rear angle with a protective housing and mounting frame
Heavy-Duty Gearbox and Drive Shaft

All John Deere flail mowers feature a rugged, heavy-duty gearbox with a continuous 65 hp (48.5 kW) rating and an intermittent 90 hp (67 kW) rating. Another feature included is a five-year, unlimited-hour warranty.

Close-up of gearbox mounted on the deck, with a protective guard and connected drive shaft housing
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Machine
Cutting Width

7.54 ft

Cutting Width

2.3 m

Offset

12-26 in.

Offset

30-70 cm

Cutting Height

0.5-5 in.

Cutting Height

13-127 mm

Hood Thickness

0.19 in.

Hood Thickness

4.8 mm

Blades
Number Of Blades

168 (84 pairs)

Blade Type

Heat-treated reversible side-slice (optional smooth-cut cupped knives)

Rotor
Rotor Speed

1850 rpm

Rotor Diameter

4.5 in.

Rotor Diameter

114 mm

Drives
Power Take-Off (PTO)

540 rpm

Gearcase (Continuous Rating)

65 hp

Gearcase (Continuous Rating)

34 kW

Belts

2-section 5VX-2 notched

Gauge Roller

5.5 in.

Gauge Roller

140 mm

Tractor HP Required
Minimum Tractor Horsepower Required

30 hp

Minimum Tractor Horsepower Required

22 kW

Maximum Tractor Horsepower Required

75 hp

Maximum Tractor Horsepower Required

56 kW

3-Point Hitch
Quick-Coupler Compatible

Yes (Category 1 and 2)

Dimensions
Overall Width

8.25 ft

Overall Width

2.5 m

Overall Height

3.25 ft

Overall Height

0.99 m

Overall Length

3.33 ft

Overall Length

1 m

Weight
Approximate Weight

1093 lb.

Approximate Weight

495 kg