John Deere 8420T

The John Deere 8420T is a tractor produced by John Deere. It is equipped with a 496 ci 8.1 L engine. The rated power output is 270 hp 201.3 kW. Transmission: John Deere PowerShift. Drive type: crawler. Operating weight: 25950 to 26380 pounds.

Overview

	2002 - 2005 8020 SeriesAgricultural Crawler tractor
2002 - 2005
8020 Series
Agricultural Crawler tractor

Production
Manufacturer	John Deere
Agricultural Crawler tractor
Built in Waterloo, Iowa, USA

Variants
8420	wheeled tractor
8420T	crawler

John Deere 8420T Engine
John Deere 8.1L 6-cyl diesel
Engine details ...

John Deere 8420T Transmission
16-speed full power shift
Transmission details ...

John Deere 8420T Power
Engine (gross)	284 hp 211.8 kW
Engine (net)	270 hp 201.3 kW
Engine (max)	314 hp 234.1 kW
PTO (claimed)	235 hp 175.2 kW
Drawbar (tested)	205.84 hp 153.5 kW
PTO (tested)	270.62 hp 201.8 kW
Performance test details ...

Mechanical
Drive	crawler
Steering	electro-hydraulic power
Hydraulic wet disc brakes
Cab standard.

Capacity
Fuel	130 gal 492.1 L
Hydraulic system	65 gal 246.0 L

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

Tractor hitch
Rear Type	III/IIIN
Rear lift	15,180 lbs 6885 kg

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	1000 (1-3/4)

Dimensions & Tracks
Wheelbase	89 inches 226 cm
	120 inches (wide track opt) 304 cm
Weight	25950 to 26380 pounds
24-inch tracks
Full dimensions and tracks ...

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

References
8020T/9020T Series published in 2003, by John Deere

Engine

Engine Detail — 496 ci / 8.1 L Diesel

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

Transmission

Transmission — John Deere PowerShift

Transmission	John Deere PowerShift
Type	full power shift
Gears	16 forward and 4 reverse
Oil capacity	260 qts 246.1 L

Dimensions

John Deere 8420T Tracks
Width	24 inches 60 cm
Length on ground	89 inches 226 cm
Area on ground	4272 in² 2.8 m²
Width	16 inches 40 cm
Length on ground	89 inches 226 cm
Area on ground	2848 in² 1.8 m²
Width	18 inches 45 cm
Length on ground	89 inches 226 cm
Area on ground	3204 in² 2.1 m²
Width	30 inches 76 cm
Length on ground	89 inches 226 cm
Area on ground	5340 in² 3.4 m²

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

John Deere 8420T Weight
Shipping	25,950 lbs 11770 kg
Operating	26,380 lbs 11965 kg
Ballasted	28,795 lbs 13061 kg
Max capacity	31,500 lbs 14288 kg

Tests

OCED Tractor Test 1778
Diesel 16-speed crawler April 7 - 27, 2000 Link: OCED Tractor Test 1778 file
PTO performance
Max power	270.62 hp 201.8 kW
Fuel use	14.6 gal/hour 55.3 l/hour
Power at rated engine speed	236.75 hp 176.5 kW
Fuel use	13.7 gal/hour 51.9 l/hour
Drawbar performance
Max power	205.84 hp 153.5 kW
Fuel use	13.7 gal/hour 51.9 l/hour
Gear 10 used for power test.
Max pull	27,233 lbs 12352 kg
Gear 3 used for pull test.