John Deere 4840 Tractor Parts
4840 parts and accessories
The John Deere 4840, manufactured from 1978 to 1982, was a popular row-crop tractor known for its power and reliability. Powered by a 176 HP diesel engine and boasting a robust PTO, the 4840 became a mainstay on farms across North America. Its comfortable cab and user-friendly design made it a favorite among farmers of the era.
The John Deere 4840 was introduced in 1978 as part of the 'Iron Horse' generation, replacing earlier models and offering increased power and improved features. It was produced until 1982. The heart of the 4840 is the John Deere 619 cubic inch (10.1L) inline 6-cylinder diesel engine, producing approximately 176 horsepower. This engine provided ample power for a variety of tasks. The tractor featured a Quad-Range transmission, offering 16 forward and 6 reverse speeds, providing operators with a wide range of gears for optimal performance in various field conditions. The 4840 delivered around 145 PTO horsepower at both 540 and 1000 RPM, allowing for versatile implement compatibility. Its hydraulic system boasted a flow rate of approximately 30 GPM, powering multiple remote hydraulic circuits. The 3-point hitch was a Category III, providing ample lift capacity for heavy implements. Commonly used in row crop farming, hay production, and general tillage operations, the 4840 distinguished itself from smaller models with its increased horsepower and heavier build, while offering a more economical option compared to the larger frame John Deere tractors of the time.
Specifications
| Engine | John Deere 619 ci (10.1L) 176 HP Diesel |
|---|---|
| PTO HP | 145 HP @ 540/1000 RPM |
| Transmission | Quad-Range, 16 Forward / 6 Reverse |
| Hydraulics | 30 GPM, 2-3 remotes |
| 3-Point Hitch | Category III, 6,800 lbs lift capacity |
| Fuel Capacity | 75 gallons |
| Weight | 16,740 lbs |
| Years Produced | 1978-1982 |
Maintenance Tips
- Engine Oil & Filter: Change the engine oil and filter every 250 hours of operation, using a high-quality diesel engine oil that meets John Deere's specifications.
- Hydraulic System: Regularly check hydraulic fluid levels and inspect for leaks. Change the hydraulic filter every 500 hours or annually, and use the recommended John Deere Hy-Gard fluid.
- Fuel System: Use clean, high-quality diesel fuel and replace the fuel filter every 250 hours. Drain any water from the fuel/water separator regularly to prevent contamination and injector issues.
- Seasonal Storage: Before storing the tractor for the off-season, fill the fuel tank to prevent condensation, change the engine oil and filter, and grease all lubrication points. Consider adding fuel stabilizer.
History & Background
The John Deere 4840 was introduced in 1978 as part of the new 'Iron Horse' generation of tractors from John Deere. It aimed to provide farmers with a reliable and powerful machine for demanding agricultural tasks. While there weren't significant redesigns during its production run, the 4840 solidified its place as a popular and dependable workhorse during a pivotal era in agricultural mechanization.
Frequently Asked Questions
What engine is in the John Deere 4840?
The John Deere 4840 is powered by a John Deere 619 cubic inch (10.1L) inline 6-cylinder diesel engine producing approximately 176 horsepower.
What is the PTO horsepower on a 4840?
The John Deere 4840 delivers approximately 145 PTO horsepower and offers both 540 and 1000 RPM PTO speed options.
What oil filter fits the 4840?
The John Deere 4840 typically uses a John Deere oil filter part number AR51727. Common cross-references include Wix 51794 or Napa 1794.
What are common parts needed for the 4840?
Common parts needed for the John Deere 4840 include engine oil filters, fuel filters, hydraulic filters, fan belts, radiator hoses, hydraulic cylinder seal kits, tie rod ends, steering components, and clutch discs/pressure plates.

R70027 - PTO Clutch Pack C3 C2 Return C1 Spring
SKU: R70027
183 in stock

R68707 - Powershift Trans 1st Planetary Brake Gear
SKU: R68707
4 in stock

R61140 - Brake Center Plate
SKU: R61140
33 in stock

R59135 - Powershift Trans 3rd Planetary Brake Gear
SKU: R59135
4 in stock

R56548 - PTO Clutch & Brake Plate
SKU: R56548
214 in stock

R53169 - Transmission / Hydraulic Oil Pump; Nylon Screen
SKU: R53169
158 in stock

R52471 - Transmission Clutch Pack Drum
SKU: R52471
65 in stock

R52169 - Brake Operating Rod Guide
SKU: R52169
143 in stock

R46418 - Trans Rear Clutch Pack Plate
SKU: R46418
347 in stock

R46417 - Planetary Brake B1 B2 B3 B4 Plate
SKU: R46417
55 in stock

R46416 - Planetary Brake B2 & B4 Plate
SKU: R46416
115 in stock

R45205 - Clutch Oil Manifold Bushing
SKU: R45205
45 in stock

R43752 - Sealing; Power Shift Clutch Manifold Ring
SKU: R43752
62 in stock

R43376 - Transmission Cover Gasket
SKU: R43376
49 in stock

R43034 - Powershift Trans 2nd Planetary Brake Gear
SKU: R43034
41 in stock

R39322 - Clutch / Brake Sealing Ring
SKU: R39322
130 in stock

R39304 - Packing (2 PK) Washer
SKU: R39304
383 in stock

R161382 - Shift Lever Knob
SKU: R161382
2092 in stock

R112836 - Pinion Shaft
SKU: R112836
1 in stock
R110464 - Metallic Brake Pads
SKU: R110464
800 in stock

PSK380 - C2 & Rear PTO Powershift Clutch Kit C1
SKU: PSK380
2 in stock

D1761 - (.182" X .481") Rivets
SKU: D1761
14823 in stock

AR78968 - Transmission Control Lock Cable
SKU: AR78968
20 in stock

AR70406 - Trans. Oil Pump Piston Seal
SKU: AR70406
94 in stock
