John Deere 7820 Tractor Parts
7820 parts and accessories
The John Deere 7820, manufactured from 2003 to 2007, became a favorite among farmers for its reliability and versatility. Powered by a robust John Deere PowerTech 6.8L diesel engine producing approximately 145 engine horsepower and 125 PTO horsepower, the 7820 offered excellent performance in a variety of agricultural applications. Its comfortable cab and advanced features made it a sought-after tractor for both row crop and livestock operations.
The John Deere 7820 was introduced in 2003 as part of the 7020 series, replacing the earlier 7810. Production continued until 2007. This tractor features a John Deere PowerTech 6.8L six-cylinder diesel engine, producing around 145 horsepower and 125 PTO horsepower. Engine displacement is 414 cubic inches. The 7820 offered several transmission options, including the popular AutoQuad II and PowrQuad Plus transmissions, providing a range of gear selections to optimize performance. Its PTO offered both 540 and 1000 RPM options, accommodating a wide range of implements. Hydraulic capacity is approximately 29.1 GPM with up to four rear remotes. It boasts a Category II/III 3-point hitch with a lift capacity of around 9,400 lbs. The 7820 was commonly used for row crop work, hay baling, livestock feeding, and various tillage operations. What sets it apart from other models in the lineup is its balance of power, features, and reliability, making it a versatile machine capable of handling diverse farming tasks. It slotted in the John Deere range above the 7720 and below the larger frame 7920.
Specifications
| Engine | John Deere PowerTech 145 HP 6.8L Diesel |
|---|---|
| PTO HP | 125 HP @ 540/1000 RPM |
| Transmission | AutoQuad II/PowrQuad Plus/IVT |
| Hydraulics | 29.1 GPM, Up to 4 remotes |
| 3-Point Hitch | Category II/III, 9400 lbs |
| Fuel Capacity | 58 gallons |
| Weight | 14,500 lbs |
| Years Produced | 2003-2007 |
Maintenance Tips
- Engine Oil & Filter: Change the engine oil and filter every 250-300 hours using high-quality oil meeting John Deere specifications. This ensures optimal engine lubrication and longevity.
- Hydraulic System: Inspect hydraulic fluid levels regularly and change the hydraulic filters every 500 hours. Use genuine John Deere hydraulic fluid to maintain system performance and prevent contamination.
- Fuel System: Use clean, high-quality diesel fuel and change the fuel filter every 500 hours. Consider using a fuel additive during colder months to prevent gelling and ensure proper fuel flow.
- Seasonal Storage: Before storing the tractor for an extended period, fill the fuel tank to prevent condensation. Disconnect the battery and store it in a cool, dry place. Consider adding a fuel stabilizer to the fuel tank.
History & Background
The John Deere 7820 was introduced in 2003 as part of the new 7020 series of tractors, building on the success of the previous 7010 models. It represented a step forward in technology and comfort, with improvements to the cab and engine performance. The 7820 quickly became a popular choice for farmers needing a reliable and versatile tractor in the mid-horsepower range.
Frequently Asked Questions
What engine is in the John Deere 7820?
The John Deere 7820 is equipped with a John Deere PowerTech 6.8L six-cylinder diesel engine. It produces approximately 145 engine horsepower.
What is the PTO horsepower on a 7820?
The PTO horsepower on the John Deere 7820 is approximately 125 HP. It offers both 540 and 1000 RPM PTO speeds.
What oil filter fits the 7820?
The recommended oil filter for the John Deere 7820 is a John Deere filter part number RE504836 or aftermarket equivalents such as Baldwin BD7153 or Wix 51791.
What are common parts needed for the 7820?
Common wear parts for the John Deere 7820 include engine oil filters, fuel filters, hydraulic filters, air filters, belts, hydraulic seals, steering components, and clutch parts. Regular replacement of these parts ensures optimal performance and prevents costly repairs.

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