John Deere 4020

Name: John Deere 4020
Brand: John Deere

Power

101 hp[P] hp

Production

1963-1972

Engine

LP gas, 6-cylinder 12-valve

Transmission

John Deere Syncro-Range

Drive

2WD/4WD

100–140 HP 1960s 1970s

From the same series:

4000

4320

Introduction

John Deere 4020: A Reference in Agricultural Power (1963-1972)

The John Deere 4020 is a high-capacity row-crop tractor produced between 1963 and 1972 at the Waterloo, Iowa, facility. It served as a cornerstone of mid-century agricultural mechanization, offering 101 horsepower and versatile drivetrain configurations to meet the demands of diversified farming operations.

Engine and Performance

The tractor is powered by a 5.9-liter, 6-cylinder, 12-valve liquid-cooled engine. It operates at a rated speed of 2200 RPM and features a 9.0:1 compression ratio. The engine was designed for durability under sustained field loads, utilizing a specific firing order of 1-5-3-6-2-4.

Transmission Systems

Two transmission options were available: the Synchro-Range and the Power Shift. The Synchro-Range provides 8 forward and 2 reverse gears, requiring the clutch for range changes. The Power Shift offers 8 forward and 4 reverse speeds, allowing for clutchless gear changes on the move, which increases efficiency during heavy draft work.

Hydraulics and Hitch

The 4020 utilizes a closed-center hydraulic system, a hallmark of the era's advanced engineering, delivering a total flow of 18 gpm at 2250 psi. This system supports a Category II rear hitch capable of lifting 3790 lbs, allowing for the operation of a wide array of implements.

Mechanical Configuration

The tractor is built on a standard 4x2 2WD chassis, with an optional 4x4 Front-Wheel Assist available after 1969. Steering is power-assisted, and the machine is equipped with hydraulic wet disc brakes for reliable stopping power. The operator station is open by design, with a factory cab option available.

Conclusion

"The John Deere 4020 remains a significant model for collectors and historical research due to its modular design, reliability, and the introduction of advanced hydraulic and transmission technologies in the 1960s. It is well-suited for heavy-duty field applications and represents a pivotal era in the evolution of row-crop tractors."

Introduction

Production Information of John Deere, 4020

The production information of the tractor (4020) includes details about its manufacturing.

Row-Crop tractor

Original price was $10,345 in 1972


	8,445 (LP)
Manufacturer	John Deere
Total built	184,879 (total)
	Mexico
	168,311 (diesel)
	8,123 (gas)
Factories	Waterloo, Iowa, USA
	17,732 (standard)

Dimension and Tires Information of John Deere, 4020

This section sums up the dimension and tires information of the tractor.


Rear tread	67 to 105 inches [170 to 266 cm (extra long axle)]
Row crop Wheelbase	97.5 inches [247 cm]
Regular rear axle	3.375 by 91 inches [85 by 2311 mm]
Width	89.6 inches [227 cm]
Standard Wheelbase	100.25 inches [254 cm]
Front tread	48.5 to 82.25 inches [123 to 208 cm]
Long rear axle	3.375 by 104 inches [85 by 2641 mm]
Length	151 inches [383 cm]
Rear tread	66 to 97 inches [167 to 246 cm (long axle)]
Rear tread	60 to 91 inches [152 to 231 cm]
Extra long rear axle	3.375 by 112 inches [85 by 2844 mm]


Ag front	6.00-16 (row crop)
	18.4-34 (standard)
	7.50-18 (standard)
Ag rear	15.5-38 (row crop)

Engine Specifications of John Deere, 4020

Get the specifications for the engine and if different options are available.

John Deere

Liquid-cooled inline

LP gas

6-cylinder 12-valve


Point gap	0.016 inches [0.406 mm]
Sparkplug gap	0.025 inches [0.635 mm]
Rated RPM	2200
Intake valve clearance	0.015 inches [0.381 mm]
Starter volts	12
Oil capacity	8 qts [7.6 L]
Firing order	1-5-3-6-2-4
Displacement	362 ci [5.9 L]
Compression	9.0:1
Bore/Stroke	4.25x4.25 inches [108 x 108 mm]
Coolant capacity	24 qts [22.7 L]
Exhaust valve clearance	0.028 inches [0.711 mm]
Coolant capacity	24 qts [22.7 L]
Coolant capacity	24 qts [22.7 L]

Transmission Information of John Deere, 4020Y

Discover all variants of transmission available for this tractor model.

Transmission variants 1

Synchro-Range requires the tractor to be stopped and clutch depressed to select one of four shift stations. Once a station is selected the tractor can be shifted on the move between the two forward gears (and single reverse in stations 1 and 2) by using the clutch.


Transmission	John Deere Syncro-Range
Oil type	303 Special
Oil capacity	52 qts [49.2 L]
Type	Partially synchronized
	303 Special
Gears	8 forward and 2 reverse

Transmission variants 2

Power Shift allows shift-on-the-move between gears without clutching.


Transmission	John Deere Power Shift
Oil type	303 Special
Oil capacity	68 qts [64.4 L]
Type	Full power shift
	303 Special
Gears	8 forward and 4 reverse

8-speed partially synchronized

8-speed full power shift

Mechanical Specs of John Deere, 4020Y

This section summarizes all mechanical information such as the brake system and other specifications.

Hydraulic wet disc brakes

Power steering

Open operator station. Cab optional.


Drive	4x2 2WD
	4x4 HFWD 4WD *Front-wheel assist was optional after 1969.
Differential lock	Mechanical rear OptOptional

Power Information of John Deere, 4020Y

Discover the power specifications and options available for this tractor model but also PTO (Power Take-off) information.


Front PTO Type	1000
Rear PTO	Independent
	1000@1900
Engine RPM	540@1900
Rear PTO Type	540/1000 (1.375)
Engine RPM	1000@1900
Front PTO	Independent
	1000 (1.375)

Hydraulics Specifications of John Deere, 4020

Hydraulic system type, pressure, pump flow and valves.


Total flow	18 gpm (early) [68.1 lpm]
Type	Closed center
Valves	1
Pressure	2250 psi [155.1 bar]
Syncro-Range Capacity	10 gal [37.9 L]
SCV flow	6 gpm [22.7 lpm]
Power Shift Capacity	12 gal [45.4 L]

Three-Point Hitch of John Deere, 4020

Hitch category and rear/front lift capacity.


Rear Type	II
Rear lift	3790 lbs [1719 kg]

Electrical System of John Deere, 4020

Battery voltage, charging system and ground.


	1 (12V system)
Ground	Positive (1964-1969)
Charging amps	55
Charging system	Motorola alternator
	Negative (1969-1972)
Battery volts	12
Batteries	2 (24V system)
	Floating (24V)
Battery AH	75

Frequently asked questions

How much horsepower does the John Deere 4020 have?

The John Deere 4020 delivers 101 hp[P] HP.

What years was the John Deere 4020 produced?

The John Deere 4020 was produced in 1963-1972.

What engine does the John Deere 4020 have?

The John Deere 4020 is powered by a LP gas, 6-cylinder 12-valve engine.

What transmission does the John Deere 4020 use?

The John Deere 4020 uses a John Deere Syncro-Range transmission.

Is the John Deere 4020 4WD?

The John Deere 4020 is available in 2WD/4WD.

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