| Manufacturer |
John Deere |
| Price |
57,648(USD) |
| Model |
4840 |
| Equipment Type |
Row-Crop Tractors |
| Factory |
Waterloo, Iowa, USA |
ENGINE DETAIL
The John Deere 4840 features a robust 6-cylinder, 7.6L turbocharged diesel engine, capable of delivering high torque at low RPMs, which is ideal for demanding agricultural applications. Its dual paper element air cleaner combined with an ether injection pre-heating system enhances cold-start performance while maintaining air quality for engine efficiency. However, keep in mind the 15.5:1 compression ratio may necessitate high-quality diesel fuel to prevent knocking, particularly in high-load scenarios.
| Description |
John Deere turbocharged intercooled diesel 6-cylinder liquid-cooled |
| Displacement |
466ci / 7.6L |
| Bore/Stroke |
4.5625x4.75inches / 116x 121mm |
| Air cleaner |
dual paper elements |
| Pre-heating |
ether injection |
| Compression |
15.5:1 |
| Rated RPM |
2200 |
| Idle RPM |
800-2400 |
| Operating RPM |
1500-2200 |
| Firing order |
1-5-3-6-2-4 |
| Starter volts |
12 |
| Coolant capacity |
40qts / 37.9L |
JOHN DEERE 4840 ENGINE
The John Deere 4840 features a robust 7.6L six-cylinder diesel engine, providing superior torque and efficiency for heavy-duty agricultural tasks. Its high horsepower output enhances productivity, while the advanced hydraulics system offers improved implement handling. However, potential challenges may include fuel consumption and maintenance costs, which should be considered in long-term operational scenarios.
| Description |
John Deere 7.6L 6-cyl diesel |
TRANSMISSION
The John Deere 4840 features a full PowerShift transmission, allowing for seamless, clutchless shifting between 8 forward and 4 reverse gears, which significantly enhances operational efficiency during fieldwork. With an oil capacity of 80 quarts (75.7L), it ensures optimal lubrication and cooling, contributing to prolonged transmission life. The inching pedal provides precise control when coupling implements, making it advantageous for tasks requiring fine maneuverability.
| Transmission |
John Deere PowerShift |
| Type |
full power shift |
| Gears |
8 forward and 4 reverse |
| Oil capacity |
80qts / 75.7L |
| Description |
Clutchless shift-on-the-move power shift between all eight forward and four reverse gears. Inching pedal provided for hooking up implements and other precision work |
JOHN DEERE 4840 TRANSMISSION
The John Deere 4840 features an 8-speed full power shift transmission, which allows for seamless gear changes without interrupting power delivery, enhancing operational efficiency. This transmission type provides a balance between performance and ease of use, making it suitable for various agricultural tasks requiring consistent speed control. However, potential challenges include increased complexity in maintenance and repair costs associated with advanced transmission systems.
| Description |
8-speed full power shift |
MECHANICAL
The John Deere 4840 features a two-wheel drive system, offering simplicity and lower maintenance costs, but may impact traction on uneven terrain. Its hydraulic wet disc brakes and pedal-actuated differential lock enhance maneuverability and control when navigating challenging conditions. The Sound-Gard cab provides operator comfort and reduced noise, making it suitable for extended use in agriculture or related fields.
| Description |
Two-wheel drive Power steering Differential hydraulic wet disc brakes Sound-Gard cab |
| Differential lock |
pedal-actuated hydraulic |
CAPACITY
| Fuel |
103gal / 389.9L |
| Hydraulic system |
16.5gal / 62.5L |
HYDRAULICS
| Type |
closed center |
| Capacity |
16.5gal / 62.5L |
| Valve |
2 or 3 |
| Pump flow |
23gpm / 87.1lpm |
TRACTOR HITCH
| Rear Type |
III/IIIN |
| Rear lift |
8295lbs / 3762kg |
POWER TAKE-OFF (PTO)
| Rear PTO |
independent |
| Rear RPM |
1000 (1.75) |
JOHN DEERE 4840 TIRES
The John Deere 4840, equipped with versatile tire options such as Ag front 10.00-16 and rear selections ranging from 18.4-42 to 30.5-32, provides enhanced traction and stability for various agricultural tasks. Advantages include adaptability to different terrains and crops, while challenges may arise in weight distribution and ground compaction based on chosen rear tire size. Optimal scenarios feature heavy tillage or hauling tasks where larger rear tires mitigate soil disturbance and improve load handling.
| Ag front |
10.00-16 |
| Ag rear |
24.5-32 / 30.5-32 / 20.8-38 / 18.4-42 |
DIMENSIONS & TIRES
The John Deere 4840 features a 118.5-inch wheelbase, providing stability during operation while handling heavy implements, making it well-suited for large agricultural tasks. Weighing between 14,900 and 18,000 pounds, it offers excellent traction but may require appropriate ground conditions to prevent soil compaction. The tire specifications—front 11.00-16 and rear 18.4-38—enhance its performance in various terrains; however, users should consider tire wear and replacement costs in long-term operation scenarios.
| Wheelbase |
118.5inches / 300cm |
| Weight |
14900 to 18000 pounds |
| Front tire |
11.00-16 |
| Rear tire |
18.4-38 |
4840 SERIAL NUMBERS
4840 SERIAL LOCATION
| Description |
Serial number plate on the rear of the 4840, above the PTO shaft |
ELECTRICAL
| Ground |
negative |
| Charging system |
alternator |
| Batteries |
2 |
| Battery volts |
6 |
