8420 Tractor (235 hp)
- 8.1 L PowerTech™ engine delivers up to 43 percent torque rise and as much as 13 percent power bulge....more
- 16-speed PowerShift transmission allows speeds ranging from 1.2 to 26 mph....more
- Standard Automatic PowerShift provides automatic shifting to maximize field performance in changing conditions....more
- Mechanical front-wheel drive (MFWD) gives 4-wheel-drive braking capabilities during transport....more
- New John Deere Independent Link Suspension™ (ILS) provides unparalleled front axle performance....more
- John Deere Active Seat™ provides smoothest ride in the industry....more
- Exclusive CommandARM™ module puts all major tractor functions in the palm of your hand....more
- 8020 Series tractors are GreenStar™ ready to take advantage of John Deere precision farming....more
- Inboard planetary final drives deliver tremendous strength and smooth power flow....more
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| MANUFACTURER | John Deere | |||
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| MODEL | 8420 Tractor (235 hp) | |||
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| Official Test | Nebr. OECD 1800, Summary #366 (2002) | |||
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| Engine | ||||
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| Manufacturer | John Deere | |||
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| Aspiration | Turbo & Air-to-Air Aftercooled | |||
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| Cylinders/Displacement, cu. in. (liters) | 6/496 (8.1) | |||
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| Cylinder Liners | Wet | |||
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| Standard | 160 (605.66) | |||
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| Performance | ||||
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| Advertised PTO HP (kW) @ Rated RPM | 235 (175) @ 2200 | |||
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| Official PTO HP (kW) @ Rated RPM | -- | |||
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| @ Standard PTO @ Eng RPM | 235.45 (175.58) @ 2200 | |||
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| Maximum @ Eng RPM | 269.41 (200.90) @ 2000 | |||
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| Advertised Engine HP (kW) @ Rated Speed | --- | |||
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| Max Unballast Drwbr HP (kW) @ Eng RPM | 233.87 (174.39) @ 2000 | |||
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| Maximum Torque (PTO) @ RPM, lb-ft (Nm) | 823 (1116) @ 1200 | |||
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| Max Torque Rise (80% Rtd Spd) @ Eng RPM | 32.0% @ 1800 | |||
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| Maximum Torque Rise % (PTO) @ Eng RPM | 46.6% @ 1200 | |||
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| Fuel Use, U.S.Gal/hr & HP hr/gal at: | ||||
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| PTO @ Rated Eng RPM | 13.66 (51.69) & 17.24 (3.40) @ 2200 | |||
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| Standard PTO Speed @ Eng Speed | 13.66 (51.69) & 17.24 (3.40) @ 2200 | |||
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| Maximum PTO Power @ Eng RPM | 14.47 (54.77) & 18.62 (3.67) @ 2000 | |||
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| Maximum Engine Power @ Eng RPM | 13.62 (51.56) & 15.23 (3.00) @ 2201 | |||
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| Max Unballasted Drawbar Power@Eng RPM | 13.62 (51.56) & 15.23 (3.00) @ 2001 | |||
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| 75% Load, Full Engine RPM (Unballasted) | 11.36 (43.00) & 14.20 (2.80) @ 2258 | |||
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| 75% Load @ Reduced RPM (Unballasted) | 09.72 (36.79) & 16.60 (3.27) @ 1696 | |||
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| Transmission | ||||
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| Std Transmission; Forward/Reverse | PowerShift 16/4 w/APS | |||
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| On-the-Go Shifting (Yes/No/Partial) | Yes | |||
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| Clutch; Wet/Dry | Hydraulic Wet Disk | |||
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| Creeper | No | |||
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| Power Take-Off (PTO) | ||||
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| Standard | Independent 1000 rpm | |||
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| Optional | 540/1000 rpm | |||
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| Speeds @ RPM | 540 @ 1978; 1000 @ 2179 | |||
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| Control | Electrohydraulic | |||
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| Hydraulics | ||||
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| Type | Closed Ctr. - Pres. & Flow Compen. | |||
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| Standard | 33.5 (127) | |||
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| Optional | 42.5 (161) | |||
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| Rated Flow @ One SCV, GPM (L/min) | 34.3 (129.8) w/std. pump | |||
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| Max Output @ SCV Couplers, GPM (L/min) | 43.2 (163.5) w/opt. pump | |||
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| Maximum Operating Pressure, PSI (kPa) | 2900 (20,000) | |||
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| Maximum Hydraulic Power, HP (kW) | 60.4 (45.1) | |||
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| Draft Control Type | Electrohydraulic | |||
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| Remote Control Valves Available | 4 Std - 3 & 5 Opt | |||
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| Hitch Category (SAE Designation) | 3/3N | |||
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| Standard | 15,180 (6884) | |||
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| Optional | 17,300 (7846) | |||
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| Final Drive | ||||
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| Type | Inboard Planetary | |||
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| Differential Controls | Electrohydraulic | |||
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| Front & Rear | Rear Only | |||
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| Engage On-the-Go Rear Differential Lock | Yes | |||
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| Operator Station | ||||
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| Gearshift Location - Console/Floor | Right-Hand Armrest | |||
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| Doors | 1- Left-Hand | |||
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| dB(A) Rating | 72.1 | |||
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| Seat Suspension System | Air std. / Active Seat optional | |||
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| 2WD Dimensions | 2WD is not an option | |||
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| MFWD Dimensions | Std. chasis frame MFWD / ILS: | |||
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| Wheelbase, in. (mm) | 116.9 (2970) / 115.7 (2940) | |||
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| Front Tread Range, in. (mm) | 60-88 (1524-2234) / 60-88 (1516-2230) | |||
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| Front Axle Clearance, in. (mm) | 27.0 (686) / 25.0 (635) | |||
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| Turning Radius w/o Brakes, ft. (m) | 18.4 (5.6) / 18.9 (5.8) | |||
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| Limited Slip Differential | Standard / Hydraulic | |||
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| Approx. Ship Wgt, lb. (kg) Open; Cab | 21,650 (9820) / 23,050 (10,455) | |||
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| 4WD Dimensions | ||||
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| Standard Tires | ||||
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| MFWD | MFWD / Indep. Link Suspension | |||
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| Front | 16.9R30 / none | |||
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| Rear | 18.4R46 / 18.4R46 | |||
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| Miscellaneous | ||||
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| Inboard Planetary | Yes | |||
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| Axle Type | Bar | |||
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| Brakes - Type and Control | Wet Disk Power | |||
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| Country of Manufacture | Waterloo, IA U.S.A. | |||
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| *Notes | None | |||
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| Specifications subject to change. Please contact your local dealer for more detailed information. | ||||