All-new design delivers improved serviceability with an integrated KP hoist, easy header hook-up and ground level fuel fill.
A best-in-class cab offers easier to use controls, better display access and visibility.
Features may include:
Advanced comfort and serviceability improve performance and uptime
Cooling package accessibility
The entire cooling package for the 8000 Series Self-Propelled Forage Harvester (SPFH) cooling system can be accessed from the service compartment in the middle of the machine. Everything can be reached easily in one spot on the machine, making daily servicing convenient. The constantly rotating radiator screen allows a wide opening angle for easier service. No tools are required for servicing the air filters. The filters can be reached when standing on the left side of machine in the service room.
Fuel tank
The standard 1100-L (290.6-gal.) fuel tank and 43-L (10.6-gal.) urea tank are located in the center on the left-hand side of the machine. This guarantees a low center of gravity. Both tanks’ filler necks are accessible from the cab stairs. Refueling is done from one single position.
Cutterhead access
The 8000 Series cutterhead unit concept provides two methods to access the shear bar and cutterhead for inspection or maintenance.
Leaving the header mounted on the machine and releasing the top locking mechanism together with the top side pivot pin, while the lower clamps remain locked, allows access to the shear bar and the knives through a 35-degree V-opening.
Detaching the header and releasing the upper and the lower locking mechanisms, provides convenient access through a feedroll door opening action, similar to the 6000 and 7000 Series Harvesters.
Heavier designed components increase reliability while improving uptime and lowering cost of operation
Capacity, harvesting quality, machine efficiency, and total cost of ownership have always been important differentiators for self-propelled forage harvesters (SPFH). Machine size, weight, or soil compaction associated with weight, and tire size is critical to producers' acceptance of certain machines on their fields. A key demand on the 8000 Series was to find a machine layout for optimum weight distribution and maximum capacity potential.
The driveline concept has been optimized for maximum flexibility in setting the individual component speeds and also synchronizing certain functions for maximum harvesting quality. Specific component design has been implemented to improve efficiency.
Components have been laid out for matching the power demand, not only of today’s producers, but also meeting potential requirements of future users.
Most advanced wear-resistance technology is applied on all crop-flow elements to assure full-season harvesting uptime. Longer component wear life significantly lowers the cost of ownership.
Optimal design and positioning of components increases crop delivery performance
A key concept for the 8000 Series Self-Propelled Forage Harvester (SPFH) line was to position all crop-flow components to avoid any restrictions, as well as to design the crop path for minimum kinetic friction on the particles.
The 8000 Series crop-flow channel begins at the harvesting unit pickup tines or crop-row pointer. On the actual harvester, it starts with the feedroll arrangement. John Deere has implemented a concept layout well proven on the 7000 Series.
Photos
Highlights
Petrolia, Ontario
2025
John Deere
8000 Series 8400
Model: 6135HZ022
Hydrostatic, 3-speed - manual shift with helical gears
Available
front: 660 mm (26 in.) | Cutterhead housing: 686 mm (27 in.) | Knife drum: 680 mm (26.8 in.) | Housing width: 540 mm (21.26 in.)
Working (maximum): 6.60 m (21.65 ft)
Specifications
2025
John Deere
8000 Series
8400
Self-Propelled Forage Harvesters
Model: 6135HZ022
Maximum: 397 kW 540 PS/ 532 hp
PowerTech™ PSS 13.5L
Exhaust emission regulation compliancy - Final Tier 4 / Stage V
13.5 L (823.8 cu in.)
Inline 6
John Deere
Engine rpm on road: 1650 rpm | 1400-2100 rpm
Unit injector plus four valves
Hydrostatic, 3-speed - manual shift with helical gears | Main driveband: Reinforced with Kevlar inserts | Rear axle type: Hydro-mechanical 4WD
Main: Dry clutch
Hydrostatic, 3-speed - manual shift with helical gears
Range at 1100 rpm: 40 knives: 7-26 mm (0.275-1.0 in.) LOC / 1 mm (0.04 in.) steps / 1100 rpm | 48 knives: 6-22 mm (0.24-0.87 in.) LOC / 1 mm (0.04 in.) steps / 1100 rpm | 56 knives: 5-19 mm (0.20-0.75 in.) LOC / 1 mm (0.04 in.) steps / Range at 1200 rpm: 56 knives: 4-17 mm (0.16-0.67 in.) LOC / 1 mm (0.04 in.) steps / 64 knives: 3-15 mm (0.12-0.59 in.) LOC / 1 mm (0.04 in.) steps
front: 660 mm (26 in.) | Cutterhead housing: 686 mm (27 in.) | Knife drum: 680 mm (26.8 in.) | Housing width: 540 mm (21.26 in.)
250 mm (9.84 in.)
560 mm (22.86 in.)
Without header: 6.5 m (21.4 ft)
Without header: 3-3.5 m (9.84-11.5 ft)
To cab roof: 3.89 m (12.75 ft)
Working (maximum): 6.60 m (21.65 ft)
50 L (13.2 U.S. gal.)
1100 L (290.6 U.S. gal.) | DEF tank capacity ( for FT4 or EU Stage V emission level): 43 L (11.4 U.S. gal.)
113 L (29.85 U.S. gal.)
320 kg (145 lb)
Crop flow components: Low-friction crop-flow concept | Number of discs: One disc | Main driveband, polybelt belts: Five ribs | Feedrolls: four | Knife types available (crop): Straight - grass / Curved - corn | Shear bar, reversible: Grass, corn, or Dura Line Plus