John Deere 8420T: all source data
All 85 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.
Overview
Production| Manufacturer | John Deere |
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| (no label) | Agricultural Crawler tractor |
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| (no label) | Built in Waterloo, Iowa, USA |
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Engine| (no label) | John Deere 8.1L 6-cyl diesel |
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Transmission| (no label) | 16-speed full power shift |
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Power| Engine (gross) | 284 hp | 211.8 kW |
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| Engine (net) | 270 hp | 201.3 kW |
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| Engine (max) | 314 hp | 234.1 kW |
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| PTO (claimed) | 235 hp | 175.2 kW |
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| Drawbar (tested) | 205.84 hp | 153.5 kW |
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| PTO (tested) | 270.62 hp | 201.8 kW |
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Mechanical| Drive | crawler |
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| Steering | electro-hydraulic power |
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| (no label) | Hydraulic wet disc brakes |
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| (no label) | Cab standard. |
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Capacity| Fuel | 130 gal | 492.1 L |
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| Hydraulic system | 65 gal | 246.0 L |
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Hydraulics| Type | closed center pressure flow compensated (PFC) |
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| Capacity | 65 gal | 246.0 L |
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| Pressure | 2900 psi | 200.0 bar |
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| Valves | 5 |
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| Pump flow | 30 gpm | 113.6 lpm |
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| Total flow | 33.5 gpm | 126.8 lpm |
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| Total flow | 42.5 gpm (optional) | 160.9 lpm |
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Hitch| Rear Type | III/IIIN |
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| Rear lift | 15,180 lbs | 6885 kg |
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Pto| Rear PTO | independent |
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| Rear PTO Type | 1000 (1-3/4) |
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Dimensions| Wheelbase | 89 inches | 226 cm |
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| Wheelbase | 120 inches (wide track opt) | 304 cm |
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| Weight | 25950 to 26380 pounds |
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| (no label) | 24-inch tracks |
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Electrical| Ground | negative |
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| Charging system | alternator |
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| Charging amps | 150 |
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| Batteries | 2 |
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| Battery CCA | 925 |
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| Battery volts | 12 |
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Engine
Engine detail| (no label) | John Deere |
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| (no label) | turbocharged diesel |
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| (no label) | 6-cylinder |
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| (no label) | liquid-cooled inline |
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| Displacement | 496 ci | 8.1 L |
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| Bore/Stroke | 4.56x5.06 inches | 116 x 129 mm |
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| Rated Power (net) | 270 hp | 201.3 kW |
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| Rated Power (gross) | 284 hp | 211.8 kW |
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| Maximum Power (net) | 300 hp | 223.7 kW |
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| Maximum Power (gross) | 314 hp | 234.1 kW |
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| Compression | 16.5:1 |
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| Rated RPM | 2200 |
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| Idle RPM | 900-2300 |
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| Operating RPM | 1500-2200 |
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| Starter volts | 12 |
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| Coolant capacity (Coolant) | 35.9 qts | 34.0 L |
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Engine oil| Oil capacity | 22.7 qts | 21.5 L |
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| Oil change | 250 h |
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Transmission
Transmission| Transmission | John Deere PowerShift |
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| Type | full power shift |
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| Gears | 16 forward and 4 reverse |
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| Oil capacity | 260 qts | 246.1 L |
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Dimensions
Tracks| Width | 24 inches | 60 cm |
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| Length on ground | 89 inches | 226 cm |
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| Area on ground | 4272 in² | 2.8 m² |
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| Width | 16 inches | 40 cm |
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| Length on ground | 89 inches | 226 cm |
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| Area on ground | 2848 in² | 1.8 m² |
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| Width | 18 inches | 45 cm |
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| Length on ground | 89 inches | 226 cm |
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| Area on ground | 3204 in² | 2.1 m² |
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| Width | 30 inches | 76 cm |
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| Length on ground | 89 inches | 226 cm |
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| Area on ground | 5340 in² | 3.4 m² |
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Dimensions| Wheelbase | 89 inches | 226 cm |
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| Wheelbase | 120 inches (wide track opt) | 304 cm |
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| Length | 207 inches | 525 cm |
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| Length | 219.6 inches (with front weights) | 557 cm |
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| Width | 103.7 inches (min) | 263 cm |
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| Width | 150 inches (max) | 381 cm |
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| Height (cab) | 122.9 inches | 312 cm |
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| Clearance (rear axle) | 21.7 inches | 55 cm |
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| Clearance (drawbar) | 17.7 inches | 44 cm |
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Weight| Shipping | 25,950 lbs | 11770 kg |
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| Operating | 26,380 lbs | 11965 kg |
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| Ballasted | 28,795 lbs | 13061 kg |
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| Max capacity (Max) | 31,500 lbs | 14288 kg |
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