John Deere 4440: A Legendary Tractor in Agricultural History

The John Deere 4440 stands as one of the most iconic and enduring tractors in the history of agricultural machinery.

Manufactured between 1978 and 1982, this model is widely regarded as a benchmark for power, reliability, and operator comfort in row-crop tractors.

Engine and Power

At the heart of the 4440 is a robust 7.6-liter, 6-cylinder turbocharged diesel engine producing a rated 162 horsepower (gross) and approximately 130 horsepower at the PTO, although dynamometer tests often showed it exceeding 150 horsepower.

This engine was an evolution of the earlier 404 cubic inch powerplant found in the 4430, with significant improvements in low- and mid-range torque, addressing previous concerns about torque delivery at lower RPMs.

This made the 4440 exceptionally responsive and capable across a wide range of farm tasks.

Transmission and Drivetrain

The 4440 was offered with two main transmission options: a 16-speed Quad-Range partial power shift and an 8-speed full Power Shift transmission.

The Quad-Range provided more gear options in the typical working range and was less expensive, while the Power Shift allowed for seamless shifting under load across all gears.

Both transmissions contributed to the tractor’s versatility and ease of operation, with power steering and differential lock features enhancing maneuverability and traction.

Hydraulics and Lift Capacity

One of the key improvements over its predecessor, the 4430, was the enhanced hydraulic system.

The 4440 featured a new rockshaft assembly that increased lift capacity by 26%, with an optional lift assist cylinder boosting it further to approximately 6,774 pounds—nearly 48% more than the previous model.

The hydraulic pump was also enlarged by 17%, supported by a reservoir that ensured constant oil supply, making the tractor well-suited for heavy implements and demanding tasks.

Build Quality and Design

John Deere engineered the 4440 to be exceptionally durable, often described as “over-engineered.”

The frame, drivetrain, and transmission components were reinforced to handle the increased power and workload.

Cooling systems were upgraded with larger radiators and dual-pressure cooling to maintain engine performance under heavy use.

The tractor’s weight ranged from approximately 11,780 to 13,270 pounds depending on configuration, with a wheelbase of 106.7 inches, contributing to its stability and balance in the field.

Operator Comfort and Features

The 4440 was notable for its comfortable Sound-Gard cab, which was a significant upgrade over earlier models with steel pan seats.

The cab was quiet and offered better visibility and ergonomics, making long hours in the field more tolerable.

Although air conditioning was not always functional in older units today, the cab design was a major selling point at the time.

The tractor also included features like power steering, hydraulic wet disc brakes, and pedal-actuated differential lock for ease of use and safety.

Legacy and Popularity

During its five-year production run, the John Deere 4440 sold over 65,000 units, averaging more than 13,000 per year, making it one of the top-selling tractors in Deere’s history.

Its reputation for reliability is underscored by many units still running strong with over 15,000 hours of use—well beyond the typical lifespan of most tractors.

The 4440’s combination of power, durability, and comfort has earned it a lasting place in the hearts of farmers and collectors alike.

John Deere 4440 Specification

Engine

Type: John Deere 7.6L (466 cubic inches) 6-cylinder turbocharged diesel engine, liquid-cooled inline

Power Output:

Gross engine power: approximately 162 hp (121 kW)

Net engine power: about 153 hp (114 kW)

PTO power (claimed): around 130-134 hp (97-100 kW)

Drawbar power (claimed): approximately 112 hp (83.5 kW)

Bore/Stroke: 4.5625 x 4.75 inches (116 x 121 mm)

Compression Ratio: 14.9:1

Rated RPM: 2200

Idle RPM: 800-2400

Fuel Tank Capacity: 65 gallons (246 liters)

Other Details: Dry air cleaner with safety element, ether injection for pre-heating, oil capacity 16 quarts (15.1 L), coolant capacity 36 quarts (34.1 L)

Transmission

Options:

16-speed Quad-Range partial power shift transmission (16 forward, 6 reverse gears)

8-speed full power shift transmission

Features: Both transmissions allow smooth shifting and versatility for various farming tasks.

The partial power shift offers more gear options in working ranges, while the full power shift allows shifting under load across all gears

Drivetrain and Mechanical Features

Drive Options: 4×2 (2WD), 4×4 HFWD (front-wheel assist 4WD), and 4×4 MFWD (mechanical front-wheel drive 4WD)

Differential Lock: Pedal-actuated hydraulic

Brakes: Differential hydraulic wet disc brakes

Steering: Power steering

Cab: Sound-Gard cab standard, with optional four-post ROPS

Hydraulics and Hitch

Hydraulic System Type: Closed center

Hydraulic Pressure: 2250 psi (155.1 bar)

Pump Flow: 23 gallons per minute (87.1 liters per minute)

Hydraulic Reservoir Capacity:

11 gal (Power Shift 2WD)

13 gal (Quad-Range 2WD)

15 gal (Power Shift 4WD)

17 gal (Quad-Range 4WD)

Valves: 2 or 3

Rear Hitch Type: Category IIIN/II

Rear Lift Capacity: 5,710 lbs (2,590 kg) standard; optional lift assist cylinder increases capacity to 6,744 lbs (3,059 kg)

Dimensions and Weight

Weight: Approximately 11,780 to 13,270 lbs (5,343 to 6,020 kg), depending on configuration

Wheelbase: About 106.7 inches (2.71 meters)

Transport Length: Approximately 4.02 meters

Summary

The John Deere 4440 is a true “Iron Horse” that exemplifies John Deere’s commitment to strength, performance, and operator satisfaction.

Its powerful turbocharged engine, versatile transmissions, enhanced hydraulics, and rugged construction made it a workhorse capable of handling nearly any job on the farm.

Even decades after production ended, the 4440 remains a highly respected and sought-after tractor, symbolizing a golden era of agricultural machinery.

This tractor is ideal for farmers seeking a reliable, powerful machine with proven longevity and excellent versatility in row-crop and general farming applications.