John Deere 620

The John Deere 620 is a tractor produced by John Deere. It is equipped with a 302.9 ci 5.0 L engine. The rated power output is 34.57 hp 25.8 kW. Transmission: 6 forward and 1 reverse. Operating weight: 5858 to 6800 pounds.

Overview

	1956 - 1958 Two-Cylinder 20 SeriesRow-Crop tractor
1956 - 1958
Two-Cylinder 20 Series
Row-Crop tractor

Production
Manufacturer	John Deere
Row-Crop tractor
Built in Waterloo, Iowa, USA
Total built	20,848
Original price was $3,000 in 1956

Variants
620	row-crop
620S	standard
620O	orchard
620HC	high-crop

John Deere 620 Transmission
6-speed unsynchronized gear
Transmission details ...

John Deere 620 Power
Drawbar (claimed)	44 hp 32.8 kW
PTO (claimed)	48 hp 35.8 kW
Drawbar (tested)	44.81 hp 33.4 kW
Belt (tested)	49.19 hp 36.7 kW
Performance test details ...

Mechanical
Two-wheel drive
Steering	power assist
Differential mechanical contracting band brakes
Open operator station.

Hydraulics
Pressure	1200 psi 82.7 bar
Valves	1 or 2
Pump flow	8.9 gpm 33.7 lpm

Tractor hitch
Rear Type	II

Power Take-off (PTO)
Rear PTO Type	540

Dimensions & Tires
Wheelbase	90 inches 228 cm
Weight	5858 to 6800 pounds
Front tire	6.00-16
Rear tire	12.4-38
Full dimensions and tires ...

Electrical
Ground	positive
Batteries	2
Battery volts	6

References
The John Deere 20 series Two Cylinder Tractors by Benjamin Hain
Tractors 1918-1976 published by John Deere*
The 1957 John Deere Tractors are here!
Facts about horsepower and fuel economy published in 1957, by John Deere
*Publication contains known errors.

Engine

Engine options
John Deere 5.0L 2-cyl gasoline
John Deere 5.0L 2-cyl all-fuel
John Deere 5.0L 2-cyl LP gas

Engine Detail — 302.9 ci / 5.0 L Gasoline

Manufacturer	John Deere
Fuel Type	Gasoline
Configuration	2-cylinder 4-valve, liquid-cooled
Displacement	302.9 ci 5.0 L
Bore/Stroke	5.50x6.375 inches 140 x 162 mm
Rated RPM	1125
Firing order	1-2
Starter volts	12
Oil capacity	8 qts 7.6 L
Coolant capacity	26 qts 24.6 L
	28 qts (orchard) 26.5 L

Engine Detail — 302.9 ci / 5.0 L

Manufacturer	John Deere
Configuration	2-cylinder 4-valve, liquid-cooled
all-fuel
Displacement	302.9 ci 5.0 L
Bore/Stroke	5.50x6.375 inches 140 x 162 mm
Air cleaner	oil bath
Compression	4.78:1
Rated RPM	1125
Firing order	1-2
Starter volts	12
Oil capacity	8 qts 7.6 L

Engine Detail — 302.9 ci / 5.0 L LP Gas

Manufacturer	John Deere
Fuel Type	LP gas
Configuration	2-cylinder 4-valve, liquid-cooled
Displacement	302.9 ci 5.0 L
Bore/Stroke	5.50x6.375 inches 140 x 162 mm
Air cleaner	oil bath
Compression	8.1:1
Rated RPM	1125
Firing order	1-2
Starter volts	12
Oil capacity	8 qts 7.6 L

Transmission

Transmission — 6 forward and 1 reverse unsynchronized gear

Manufacturer	John Deere
Type	unsynchronized gear
Gears	6 forward and 1 reverse
Clutch	mechanical dry disc
Oil capacity	24 qts 22.7 L
With 13.6-38 rear tires.

Dimensions

John Deere 620 Tires
Ag front	6.00-16
	7.50-20 (high-crop)
Ag rear	12.4-38
	13-30 (standard)

Dimensions
Wheelbase	90 inches 228 cm
Length	135.25 inches 343 cm
High-crop Length	147.1875 inches 373 cm
Width	86.625 inches 220 cm
High-crop Width	74 inches 187 cm
Height	88.125 inches 223 cm
High-crop Height	96.75 inches 245 cm
Rear tread	58 to 88 inches 147 to 223 cm
Rear tread	58 to 104 inches 147 to 264 cm (long axle)

John Deere 620 Weight
Shipping	5,858 lbs 2657 kg
Operating	6,800 lbs 3084 kg
Ballasted	8,769 lbs 3977 kg

Tests

Tractor Tests
NTTL 591: LP gas 6-speed 2WD
NTTL 598: gasoline 6-speed 2WD
NTTL 604: tractor fuel 6-speed 2WD

Nebraska Tractor Test 591
LP gas 6-speed 2WD September 6 - 11, 1956 Link: Nebraska Tractor Test 591 file
Belt power (max)	49.19 hp 36.7 kW
Belt fuel use (max)	5.2 gal/hour 19.7 l/hour
Drawbar performance
Max power	44.81 hp 33.4 kW
Gear 4 used for power test.
Max pull	5,920 lbs 2685 kg
Gear 2 used for pull test.

Nebraska Tractor Test 598
Gasoline 6-speed 2WD October 10 - 15, 1956 Link: Nebraska Tractor Test 598 file
Belt power (max)	46.75 hp 34.9 kW
Belt fuel use (max)	4.2 gal/hour 15.9 l/hour
Drawbar performance
Max power	42.40 hp 31.6 kW
Gear 4 used for power test.
Max pull	6,122 lbs 2776 kg
Gear 1 used for pull test.

Nebraska Tractor Test 604
Tractor fuel 6-speed 2WD November 1 - 8, 1956 Link: Nebraska Tractor Test 604 file
Belt power (max)	34.57 hp 25.8 kW
Belt fuel use (max)	3.4 gal/hour 12.9 l/hour
Drawbar performance
Max power	32.37 hp 24.1 kW
Gear 4 used for power test.
Max pull	6,107 lbs 2770 kg
Gear 1 used for pull test.