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John Deere 8420T

John Deere 8420T tractor
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The John Deere 8420T is an agricultural crawler tractor produced from 2002 to 2005 as part of the 8020 Series. It features a John Deere 8.1L 6-cylinder turbocharged diesel engine delivering up to 314 hp gross power. The tractor uses a 16-speed full power shift John Deere PowerShift transmission and has electro-hydraulic power steering with hydraulic wet disc brakes. It has a fuel capacity of 130 gallons and a hydraulic system capacity of 65 gallons. The 8420T rides on 24-inch tracks and offers a rear hitch lift capacity of 15,180 lbs. Dimensions include a wheelbase of 89 inches, length of 207 inches, and a cab height of 122.9 inches. The tractor weighs between 25,950 and 28,795 lbs depending on configuration. Electrical system includes a 150 amp alternator and two 12-volt batteries.
John Deere 8420Ttractorspecificationscrawler tractor8020 Series8.1L enginePowerShift transmissionagricultural tractor
Power284 hp
Founded2002 - 2005
Model8420T

Technical Specifications

Detailed specifications and technical data for John Deere 8420T

Power

Engine (max):314 hp (234.1 kW)
Engine (net):270 hp (201.3 kW)
PTO (tested):270.62 hp (201.8 kW)
PTO (claimed):235 hp (175.2 kW)
Engine (gross):284 hp (211.8 kW)
Drawbar (tested):205.84 hp (153.5 kW)

Engine

Type:turbocharged diesel
Model:John Deere 8.1L 6-cyl diesel
Cooling:liquid-cooled inline
Idle RPM:900-2300
Cylinders:6-cylinder
Rated RPM:2200
Bore/Stroke:4.56x5.06 inches (116 x 129 mm)
Compression:16.5:1
Displacement:496 ci (8.1 L)
Oil capacity:22.7 qts (21.5 L)
Operating RPM:1500-2200
Starter volts:12
Coolant capacity:35.9 qts (34.0 L)
Rated Power (net):270 hp (201.3 kW)
Maximum Power (net):300 hp (223.7 kW)
Oil change interval:250 h
Rated Power (gross):284 hp (211.8 kW)
Maximum Power (gross):314 hp (234.1 kW)

Tracks

16-inch width:16 inches (40 cm)
18-inch width:18 inches (45 cm)
24-inch width:24 inches (60 cm)
30-inch width:30 inches (76 cm)
16-inch area on ground:2848 in² (1.8 m²)
18-inch area on ground:3204 in² (2.1 m²)
24-inch area on ground:4272 in² (2.8 m²)
30-inch area on ground:5340 in² (3.4 m²)
16-inch length on ground:89 inches (226 cm)
18-inch length on ground:89 inches (226 cm)
24-inch length on ground:89 inches (226 cm)
30-inch length on ground:89 inches (226 cm)

Weight

Shipping:25,950 lbs (11770 kg)
Ballasted:28,795 lbs (13061 kg)
Operating:26,380 lbs (11965 kg)
Max capacity:31,500 lbs (14288 kg)

Capacity

Fuel:130 gal (492.1 L)
Hydraulic system:65 gal (246.0 L)

Electrical

Ground:negative
Batteries:2
Battery CCA:925
Battery volts:12
Charging amps:150
Charging system:alternator

Hydraulics

Type:closed center pressure flow compensated (PFC)
Valves:5
Capacity:65 gal (246.0 L)
Pressure:2900 psi (200.0 bar)
Pump flow:30 gpm (113.6 lpm)
Total flow:33.5 gpm (126.8 lpm)
Optional flow:42.5 gpm (160.9 lpm)

Mechanical

Cab:standard
Drive:crawler
Brakes:Hydraulic wet disc brakes
Steering:electro-hydraulic power

Production

Type:Agricultural Crawler tractor
Series:8020 Series
Built in:Waterloo, Iowa, USA
Years produced:2002 - 2005

Transmission

Type:John Deere PowerShift
Gears:16 forward and 4 reverse
Notes:Fourth reverse at 1600 RPM.
Shift:full power shift
Oil capacity:260 qts (246.1 L)

Tractor hitch

Rear Type:III/IIIN
Rear lift:15,180 lbs (6885 kg)

Dimensions & Tracks

Length:207 inches (525 cm)
Wheelbase:89 inches (226 cm)
Width (max):150 inches (381 cm)
Width (min):103.7 inches (263 cm)
Height (cab):122.9 inches (312 cm)
Clearance (drawbar):17.7 inches (44 cm)
Wide track wheelbase:120 inches (304 cm)
Clearance (rear axle):21.7 inches (55 cm)
Length with front weights:219.6 inches (557 cm)

Power Take-off (PTO)

Rear PTO:independent
Rear PTO Type:1000 (1-3/4)

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