John Deere 820: all source data

All 64 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
(no label)	Standard-tread tractor
(no label)	Built in Waterloo, Iowa, USA
Total built	7,080
(no label)	The early model 820 "Green Dash" tractors were little-changed from the previous model 80. in 1957, for the 1958 production year, the improved 820 "Black Dash" tractors appeared with a number of modifications and more horsepower.

Engine
(no label)	John Deere 7.7L 2-cyl diesel
Fuel tank	32.5 gal \| 123.0 L
Aux. fuel	0.25 gal \| 0.9 L

Transmission
(no label)	6-speed unsynchronized gear

Power
Belt (claimed)	67 hp (Green Dash) \| 50.0 kW
Belt (claimed)	75.6 hp (Black Dash) \| 56.4 kW
Plows	5-6
Drawbar (tested)	67.15 hp \| 50.1 kW
Belt (tested)	72.82 hp \| 54.3 kW

Mechanical
(no label)	Two-wheel drive
Final drives	bull gear
Steering	manual
Steering	power optional
(no label)	Mechanical expanding shoe brakes
(no label)	Open operator station. Steel cab optional.

Hydraulics
Type	open center
Valves	1

Pto
Rear PTO	independent
Rear PTO Type	540 (1.375)

Dimensions
Wheelbase	85.25 inches \| 216 cm
Weight	7850 to 8600 pounds
Front tire	7.50-18
Rear tire	15-34

Belt pulley
Diameter	12.2 inches \| 30 cm
Width	9 inches \| 22 cm
RPM	1125
Speed	3600 ft/min \| 1097.28 meters/min

Electrical
Ground	positive
Charging system	generator
Battery volts	6

Engine

Engine detail
(no label)	John Deere
(no label)	diesel
(no label)	2-cylinder
(no label)	liquid-cooled
Displacement	470.7 ci \| 7.7 L
Bore/Stroke	6.125x8.00 inches \| 156 x 203 mm
Air cleaner	oil bath
Rated RPM	1125
Firing order	1-2
Starter type	gasoline pony motor
Coolant capacity (Coolant)	8 qts \| 7.6 L

Transmission

Transmission
Manufacturer	John Deere
Type	unsynchronized gear
Gears	6 forward and 1 reverse
Clutch	9-inch dry disc
(no label)	Optional low-speed first gear was 1.75 MPH.

Dimensions

Tires
Ag front	7.50-18
Ag rear	15-34
Ag rear	14-34
Ag rear	18-26

Dimensions
Wheelbase	85.25 inches \| 216 cm
Length	142.75 inches \| 362 cm
Width	79.5 inches \| 201 cm
Height	81 inches \| 205 cm
Front tread	56.5 to 63 inches \| 143 to 160 cm
Rear tread	64.5/68.5 inches \| 163/173 cm

Weight
Shipping	7850 lbs \| 3560 kg
Operating	8600 lbs \| 3900 kg
Ballasted	12000 lbs \| 5443 kg