John Deere 8420T tractor specifications

2002 - 2005

2002 - 2005 8020 SeriesAgricultural Crawler tractor

Production

Production Manufacturer:John Deere
Type:Agricultural Crawler tractor
Factory:Waterloo, Iowa, USA

Variants

Variants 8420:wheeled tractor
8420T:crawler

2002 - 2005

8020 Series

Row-Crop tractor

Production

Production
Manufacturer:	John Deere
Type:	Row-Crop tractor
Factory:	Waterloo, Iowa, USA

Variants

Variants
8420:	wheeled tractor
8420T:	crawler

John Deere 8420 Power

John Deere 8420 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):	207.49 hp 154.7 kW
PTO (tested):	269.41 hp 200.9 kW
power test details ...

John Deere 8420 Engine

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

Mechanical

Mechanical
Chassis:	4x4 MFWD 4WD
Steering:	hydrostatic power
Brakes:	hydraulic wet disc
Trailer brakes:	hydraulic*Optional
Cab:	Cab standard.
Transmission:	16-speed full power shift
Transmission details ...

Capacity

Capacity
Fuel:	160 gal 605.6 L
Hydraulic system:	37 gal 140.0 L
ILS Hydraulic system:	39.6 gal 149.9 L
Front hubs:	3.6 qts 3.4 L
ILS Front hubs:	4.2 qts 4.0 L
Front diff.:	14.2 qts 13.4 L

Hydraulics

Hydraulics
Type:	closed center pressure-flow compensated (PFC)
Capacity:	37 gal 140.0 L
ILS Capacity:	39.6 gal 149.9 L
Pressure:	2900 psi 200.0 bar
Valves:	4 to 5
SCV flow:	30 gpm 113.6 lpm
Total flow:	33.5 gpm 126.8 lpm *With standard 45cc pump
	42.5 gpm 160.9 lpm *Optional 57cc pump

Tractor hitch

Tractor hitch
Rear Type:	III/IIIN
Rear lift:	15180 lbs 6885 kg
	17300 lbs 7847 kg *Optional
Front Hitch:	IIIN*Optional
Front lift:	11000 lbs 4989 kg

Power Take-off (PTO)

Power Take-off (PTO)
Rear PTO:	independent
Clutch:	hydraulic wet discs
Rear RPM:	1000 (1.75)
	540/1000 (1.375 optional)
Engine RPM:	540@1975 1000@2200

Dimensions & Tires

Dimensions & Tires
Wheelbase:	118.9 inches 302 cm
	117.7 inches 298 cm (ILS)
Weight:	21650 to 23780 pounds
Front tire:	16.9R30
Rear tire:	18.4R46
Full dimensions and tires ...

8420 Serial Numbers

8420 Serial Numbers
Location:	Serial number plate on rear of tractor.
2002:	1001
2003:	10001
2004:	20001
2005:	30001
how to read serial numbers...

Electrical

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

John Deere 8420T Power

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
power test details ...

2002 - 2005

8020 Series

Agricultural Crawler tractor

OCED Tractor Test 1778

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.

John Deere 8420T Engine

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

2002 - 2005

8020 Series

Agricultural Crawler tractor

Engine Detail

Engine Detail
John Deere
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 (ECE R24):	270 hp 201.3 kW
Rated Power (EC 97/98):	284 hp 211.8 kW
Maximum Power (ECE R24):	300 hp 223.7 kW
Maximum Power (EC 97/68):	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

Engine Oil

Engine Oil

Oil capacity:	22.7 qts 21.5 L
Oil change:	250 h

Mechanical

Mechanical Chassis:crawler
Steering:electro-hydraulic power
Brakes:hydraulic wet disc
Cab:Cab standard.
Transmission:16-speed full power shift
Transmission details ...

2002 - 2005

8020 Series

Agricultural Crawler tractor

Transmission

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

Speeds

Speeds
Fourth reverse at 1600 RPM.

Capacity

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

Hydraulics

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
160.9 lpm (optional)

Tractor hitch

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

Power Take-off (PTO)

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

Dimensions & Tracks

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

2002 - 2005

8020 Series

Agricultural Crawler tractor

John Deere 8420T Tracks

John Deere 8420T Tracks
Size:	16-inch tracks
Option:	18-inch tracks
	24-inch tracks
	30-inch tracks

Dimensions

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