John Deere 4840 Row-Crop Tractors Specifications
Engine
The engine is a John Deere turbocharged intercooled diesel 6-cylinder liquid-cooled with a displacement of 466ci / 7.6L and bore/stroke of 4.5625x4.75inches / 116x 121mm. It has dual paper elements air cleaner and pre-heating with ether injection. The compression ratio is 15.5:1 and it is rated at 2200 rpm. The engine has an idle rpm of 800-2400 and operating rpm of 1500-2200. The firing order is 1-5-3-6-2-4 and the starter volts are 12. The coolant capacity is 40qts / 37.9L.
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Find Suppliers & Request SamplesTransmission
The transmission is an 8-speed full power shift. Unfortunately, no further details were provided in the .
Brakes
The brakes are differential hydraulic wet disc brakes. The tractor also has power steering and a pedal-actuated hydraulic differential lock. The Sound-Gard cab provides a comfortable and quiet ride. The John Deere 4840 has two-wheel drive.
Steering
The steering is a John Deere 7.6L 6-cylinder diesel. Unfortunately, no further details were provided in the .
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Find Suppliers & Request SamplesCommon Problems
Users have reported issues with the hydraulic system, particularly with leaks and failures. The brakes have also been known to wear out quickly and require frequent maintenance. Some users have also reported issues with the transmission, including slipping and difficulty shifting. Additionally, the engine has been known to overheat in certain conditions. Finally, some users have reported issues with the electrical system, including problems with the starter and alternator.
What Users Like
Users appreciate the power and performance of the John Deere 4840, particularly when it comes to heavy-duty tasks like plowing and tilling. The tractor is also known for its comfortable ride and easy-to-use controls. Many users also appreciate the durability and reliability of the tractor, which can withstand years of heavy use without breaking down. Finally, users appreciate the versatility of the tractor, which can be used for a wide range of tasks on the farm or job site.
Techincal Specifications
Engine Detail | |
| 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 |
Engine | |
| Description | John Deere 7.6L 6-cyl diesel |
Transmission | |
| Description | 8-speed full power shift |
Mechanical | |
| Description | Two-wheel drive Power steering Differential hydraulic wet disc brakes Sound-Gard cab |
| Differential Lock | pedal-actuated hydraulic |
Tires | |
| Ag Front | 10.00-16 |
| Ag Rear | 24.5-32 / 30.5-32 / 20.8-38 / 18.4-42 |
Dimensions And Tires | |
| Wheelbase | 118.5inches / 300cm |
| Weight | 14900 to 18000 pounds |
| Front Tire | 11.00-16 |
| Rear Tire | 18.4-38 |
Serial Numbers | |
| 1979 | 4233 |
| 1989 | 14933 |
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 |
Electrical | |
| Ground | negative |
| Charging System | alternator |
| Batteries | 2 |
| Battery Volts | 6 |
Power Take Off Pto | |
| Rear Pto | independent |
| Rear Rpm | 1000 (1.75) |
Serial Location | |
| Description | Serial number plate on the rear of the 4840, above the PTO shaft |