John Deere 4840 Tractor: Complete Specs, Price, and More

The John Deere 4840 tractor belongs to the Iron Horses model series and appeared on the market for five years from 1978 to 1982. It is sturdiest known for its whopping 200 horsepower, 466 cubic inch (7.64 liters) turbocharged and intercooled diesel engine. It has a fully derived transmission with 8 forward and 4 reverse gears which can boost speeds upwards of 18.6 mph forward and 6.4 mph in the reverse.

The tractor is an enclosed hydraulic one with a flow rate of 23 gpm and a lift capacity of over 8,000 pounds at the 3-point hitch. Its fuel tank has a capacity of 103 gallons so it is suitable for working long hours in the field. The 4840 is also fitted with an independent PTO which performs the function of 180 hp at 1000 rpm, thus making it versatile to employ a variety of farm implements. The tractor’s construction includes a Sound-Gard cab for operator comfort, and it has a high degree of reliability, with the weight being between 14,900 to 18,000 pounds, which makes it a suitable option for heavy-duty agricultural jobs.

Overview

Category	Details
Model	John Deere 4840
Years of Production	1978 – 1982
Series	Iron Horses
Engine
– Model	John Deere 6466
– Type	4-stroke, six-cylinder, direct injection turbocharged intercooled diesel
– Displacement	466 cubic inches (7.64 liters)
– Horsepower	200 hp at 2200 rpm
– Fuel Tank Capacity	103 gallons (390 liters)
Transmission
– Type	Power Shift
– Gearbox	Full powershift, 8F/4R
– Max Speed (Forward)	18.6 mph (29.9 km/h)
– Max Speed (Reverse)	6.4 mph (10.3 km/h)
Hydraulic System
– Type	Closed center
– Pump Flow	23 gpm (87.1 L/min)
– Pressure	157 bar (2275 psi)
Hitch
– Category	3/3N
– Lift Capacity	8,295 lbs (3,760 kg)
Dimensions
– Wheelbase	118.5 inches (300 cm)
– Length	177 inches (449 cm)
– Width	96 inches (243 cm)
– Height	117 inches (297 cm)
– Weight	14,900 to 18,000 lbs (6,758 to 8,165 kg)
PTO
– Type	Independent
– Speed	1000 rpm
– Horsepower	180 hp at 1000 rpm
Operational Features
– Steering	Power Steering
– Brakes	Differential hydraulic wet disc
– Cab	Sound-Gard Cab
Original List Price	Approximately $57,648 in 1982
Current Market Value	$20,000 – $30,000 (used, condition dependent)

Engine Specifications

Attribute	Details
Engine Model	John Deere 6466
Engine Type	4-stroke, six-cylinder, direct injection turbocharged intercooled diesel
Displacement	466 cubic inches (7.64 liters)
Bore x Stroke	4.56 in x 4.75 in (116 mm x 121 mm)
Horsepower	200 hp at 2200 rpm
Compression Ratio	15.5:1
Fuel System	Direct injection
Fuel Tank Capacity	103 gallons (390 liters)
Oil Capacity	21 quarts (19.9 liters)
Coolant Capacity	40 quarts (37.5 liters)
Electrical System	12 volts, Alternator (90 amps)

Transmission Details

Attribute	Details
Transmission Type	Power Shift
Gearbox Type	Full powershift, 8F/4R
Clutch Type	Wet disc
Maximum Forward Speed	18.6 mph (29.9 km/h)
Maximum Reverse Speed	6.4 mph (10.3 km/h)
Gear Oil Capacity	80 quarts (75.7 liters)

Hydraulic and Hitch System

Attribute	Details
Hydraulic System Type	Closed center
Implement Pump Flow	23 gpm (87.1 L/min)
Hydraulic Pressure	157 bar (2275 psi)
Hydraulic Capacity	16.5 gallons (62.5 liters)
Number of Remote Valves	2/3
3-Point Hitch Category	3/3N
Lift Capacity at Hitch	8,295 lbs (3,760 kg)

Dimensions and Weight

Attribute	Details
Wheelbase	118.5 inches (300 cm)
Overall Length	177 inches (449 cm)
Overall Width	96 inches (243 cm)
Overall Height	117 inches (297 cm)
Front Tread	58 to 100 inches
Rear Tread	60 to 131.5 inches
Weight	14,900 to 18,000 lbs (6,758 to 8,165 kg)
Tire Size (Front)	10.00-16 or 16.5Lx16.1
Tire Size (Rear)	18.4×38 or 18.4×42

Operational Features

Attribute	Details
PTO Type	Independent
PTO Speed	1000 rpm
PTO Horsepower	180 hp at 1000 rpm
Steering	Power Steering
Brakes	Differential hydraulic wet disc
Cab	Sound-Gard Cab for operator comfort

Operator Comfort and Features

Comfort Feature	Details
Cab	SoundGard cab with air-conditioning and heating
Seat	Adjustable, high-back seat with armrests
Controls	Ergonomically designed for easy access
Visibility	Excellent all-around visibility

Attachments and Compatibility

Attachment Type	Compatibility
Plows	Fully compatible
Loaders	Compatible with John Deere 145 and 158 loaders
Mowers	Compatible with most 3-point hitch mowers
Balers	Fully compatible

Fuel Efficiency and Tank Capacity

Fuel Parameter	Specifications
Fuel Capacity	70 gallons
Fuel Consumption	6-8 gallons per hour (depending on load)
Fuel Type	Diesel

Pricing and Market Trends

The John Deere 4840, while no longer in production, holds significant value in the used equipment market. Originally priced at around $57,648 in 1982, its current market value can range from $16,000 to $39,000, depending on condition, modifications, and location. Factors influencing price include:

Price Parameter	Details
New Price (1980s)	50,000− 60,000
Used Price	16,000−39,000
Resale Value	High, due to its durability and brand reputation

Why Choose the John Deere 4840?

Here’s why you might choose the John Deere 4840:

• Power: Offers 200 hp, making it suitable for heavy tasks like plowing or pulling large implements.
• Durability: Known for longevity with many still operational decades later, showcasing John Deere’s build quality.
• Versatility: Its 8-speed powershift transmission and high PTO power allow for a wide range of farming tasks.
• Comfort: The Sound-Gard cab reduces noise and provides climate control, enhancing operator endurance.
• Hydraulic Capacity: With a strong hydraulic system, it supports modern farming equipment effectively.
• Investment: As a collector’s item or for use, its market value holds well due to its reputation and rarity.
• Independent PTO: Enhances efficiency with implements that require consistent power.
• Fuel Efficiency: Despite its power, it’s known for reasonable fuel consumption for its size and capabilities.

Conclusion

The John Deere 4840 is a classic choice of farming and collectible among farmers and collectors, and it is famous both for its historical significance and for its practical application in modern agriculture. Its excellent set of power, comfort and versatility makes it a valuable machine. Those who are new to the tractor should learn about its specs, potential costs, and maintenance requirements if they want to use them optimally at the farm. John Deere 4840 is and will be in the fields of the world for a long time, be it for the nostalgia or necessity reasons!

FAQ

1. What is the horsepower of a John Deere 4840 tractor?

• The John Deere 4840 tractor has an engine horsepower of 200 at 2200 rpm.

2. How much does a John Deere 4840 tractor weigh?

• The weight of the John Deere 4840 can range from 14,900 to 18,000 pounds, depending on the configuration and attachments.

3. What years was the John Deere 4840 produced?

• The John Deere 4840 was manufactured from 1978 to 1982.

4. What kind of engine does the John Deere 4840 have?

• It features a John Deere 6466 engine, which is a 4-stroke, six-cylinder, turbocharged and intercooled diesel engine with a displacement of 466 cubic inches (7.64 liters).

5. What is the fuel tank capacity of a John Deere 4840?

• The fuel tank capacity of the John Deere 4840 is 103 gallons (390 liters).

6. How many gears does the John Deere 4840 have?

• The 4840 comes with a full power shift transmission offering 8 forward and 4 reverse gears.

7. Can the John Deere 4840 be equipped with a cab?

• Yes, the John Deere 4840 comes with the option for a Sound-Gard cab, enhancing operator comfort with noise reduction and climate control features.

8. What is the PTO horsepower of the John Deere 4840?

• The PTO (Power Take-Off) horsepower is rated at 180 hp at 1000 rpm.

9. How fast can a John Deere 4840 go?

• The maximum forward speed is 18.6 mph (29.9 km/h), and the maximum reverse speed is 6.4 mph (10.3 km/h).

10. What are common maintenance issues with the John Deere 4840?

A number of common issues associated with maintenance comprise following a regular schedule of oil changes, examining the cooling system to verify the condition of leaks and blockages, servicing the hydraulic system and watching for tire and belt wear. The electrical systems may need attention as well, particularly if the tractor has been parked and not used regularly due to its old age.

11. Is the John Deere 4840 considered reliable?

Absolutely, it is well-known for its reliability and durability. In particular, around a hundred of the old models are still running, which is a prime example of the quality and the science of those days. 

12. How much does a used John Deere 4840 cost today?

The price for a pre-owned John Deere 4840 tractor is within the broad range of $16,000 to $39,500. The main reason for this discrepancy in price is the differences existing in such factors as the tractor’s condition, hours of use, and specific features.