| Manufacturer |
John Deere |
| Price |
53,123(USD) |
| Model |
4640 |
| Equipment Type |
Row-Crop Tractors |
| Factory |
Waterloo, Iowa, USA |
ENGINE DETAIL
The John Deere 4640 is equipped with a robust turbocharged intercooled diesel engine, providing high torque and efficiency in demanding agricultural applications. Its 15.5:1 compression ratio and well-optimized operating RPM range (1500-2200) contribute to effective power delivery while maintaining fuel efficiency. However, pre-heating via ether may introduce maintenance challenges in colder climates; regular checks on oil and coolant levels (20qts and 38qts respectively) are crucial for engine health.
| Description |
John Deere turbocharged intercooled diesel 6-cylinder liquid-cooled |
| Displacement |
466ci / 7.6L |
| Bore/Stroke |
4.5625x4.75inches / 116x 121mm |
| Pre-heating |
ether |
| 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 |
| Oil capacity |
20qts / 18.9L |
| Coolant capacity |
38qts / 36.0L |
JOHN DEERE 4640 ENGINE
The John Deere 4640 features a robust 7.6L 6-cylinder diesel engine, providing high torque for demanding field applications. Its strong power output is advantageous for heavy tillage and large implement work, ensuring efficient fuel consumption. However, the weight and size may challenge maneuverability in tighter spaces, making it less suitable for smaller farms or residential use.
| Description |
John Deere 7.6L 6-cyl diesel |
TRANSMISSIONS OVERVIEW
The John Deere 4640 equipped with a 16-speed partial power shift transmission offers flexibility in speed selection, which is advantageous for varied field conditions and tasks. The 8-speed full power shift option provides seamless gear transitions, enhancing productivity during heavy fieldwork. Users may face a learning curve with power shift operations, but overall, it improves efficiency for tasks like plowing or tilling.
| Description |
16-speed partial power shift 8-speed full power shift |
TRANSMISSION 1
The John Deere 4640's Quad-Range transmission offers a combination of 16 forward and 6 reverse speeds, enhancing operational versatility for various field applications. The partial power shift allows for seamless transitions between certain gear pairs, improving efficiency during tasks like plowing or tilling; however, the requirement to stop and engage the clutch for range shifts can interrupt workflow in high-demand scenarios. Overall, this system excels in delivering robust torque and responsiveness, albeit with potential limitations in fast-paced environments requiring constant range changes.
| Transmission |
John Deere Quad-Range |
| Type |
partial power shift |
| Gears |
16 forward and 6 reverse |
| Description |
Four gears (1-4) in four ranges (A-D). Power shift between pairs 1-2 and 3-4 in each range, with synchronized shift between 2-3. Two reverses in ranges A-C. Tractor must be stopped, and clutch used, to shift ranges. Power shift is provided hy a hydraulically-controlled planetary that provides an under-drive to each gear |
TRANSMISSION 2
The John Deere 4640 features a robust PowerShift transmission that allows for clutchless shifting between 8 forward and 4 reverse gears, enhancing operational efficiency during fieldwork. The inching pedal facilitates precise implement engagement, making it ideal for tasks requiring accurate speed control. Potential challenges may include a learning curve for optimal gear utilization and maintenance of the transmission system to ensure sustained performance.
| Transmission |
John Deere PowerShift |
| Type |
full power shift |
| Gears |
8 forward and 4 reverse |
| 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 4640 TRANSMISSIONS
The John Deere 4640 features a 16-speed partial power shift transmission, allowing smooth gear transitions under load, ideal for varying field conditions, while the 8-speed full power shift option provides a straightforward, quick engagement for heavy-duty applications. The advantage of the partial power shift is improved efficiency and operator comfort during prolonged use, though it may require more operator skill to optimize performance. In scenarios where responsive power delivery is vital, such as in tillage or heavy pulling tasks, the 4640’s transmission options enhance productivity and versatility.
| Description |
16-speed partial power shift 8-speed full power shift |
MECHANICAL
The John Deere 4640 features a versatile 4x2 and 4WD configuration, allowing for enhanced traction and stability in varied terrains. Its pedal-actuated hydraulic differential lock improves performance in slippery conditions but may pose a learning curve for operators unfamiliar with its function. The hydrostatic power steering provides responsive maneuverability, while the hydraulic wet disc brakes ensure consistent stopping power—ideal for heavy-duty applications and increased operator comfort within the Sound-Gard cab.
| Drive |
4x2 2WD/4x4 HFWD 4WD |
| Differential lock |
pedal-actuated hydraulic |
| Steering |
hydrostatic power |
| Description |
Differential hydraulic wet disc brakes/Sound-Gard cab standard |
CAPACITY
| Fuel |
83gal / 314.2L |
| 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 |
7328lbs / 3323kg |
POWER TAKE-OFF (PTO)
| Rear PTO |
independent |
| Rear RPM |
1000 (1.75) |
JOHN DEERE 4640 TIRES
The John Deere 4640 tractor features a versatile tire size selection, accommodating various agricultural applications through options such as 24.5-32, 30.5-32, and 20.8-38 for the rear, which enhances traction and load-bearing capacity on different terrains. The front tire size of 10.00-16 complements its rear capabilities but may limit versatility in certain soil conditions. Operators should consider the implications of tire choice on ground compaction and fuel efficiency when selecting the appropriate setup for their specific tasks.
| Ag front |
10.00-16 |
| Ag rear |
24.5-32 / 30.5-32 / 20.8-38 / 18.4-42 |
DIMENSIONS & TIRES
The John Deere 4640 tractor features a wheelbase of 118.5 inches, promoting stability and maneuverability in both field and transport scenarios. Weighing between 14,350 to 15,700 pounds allows for substantial tillage and lifting capacity, while the front and rear tire specifications (11.00-16 and 18.4-38) contribute to enhanced traction and soil compaction management. However, the weight may challenge mobility in certain terrains, and tire choice can impact overall performance depending on soil conditions.
| Wheelbase |
118.5inches / 300cm |
| Weight |
14350 to 15700 pounds |
| Front tire |
11.00-16 |
| Rear tire |
18.4-38 |
4640 SERIAL NUMBERS
4640 SERIAL LOCATION
| Description |
Serial number plate on the rear of the 4640, above the PTO shaft |
ELECTRICAL
| Ground |
negative |
| Charging system |
alternator |
| Batteries |
2 |
| Battery volts |
6 |
