John Deere 3120 Tractor Parts

3120 parts and accessories

The John Deere 3120 tractor, manufactured from 1969 to 1975, was a popular choice for farmers due to its reliability and versatility. Powered by a robust 70 horsepower diesel engine, the 3120 delivered ample power for various tasks. With a PTO horsepower of 62, this tractor excelled in powering implements used in haying, tillage, and general farm work, making it a valuable asset for agricultural operations.

The John Deere 3120 was introduced in 1969 as part of the John Deere's '20 series' of tractors, a lineup designed to offer increased power and improved features compared to their predecessors. Production continued until 1975. The 3120 is equipped with a John Deere 4.0L (244 cu in) 4-cylinder diesel engine, producing approximately 70 engine horsepower. Its transmission is a Synchro Range transmission with 8 forward and 2 reverse gears, offering a good range of speeds for various applications. The PTO horsepower is rated at 62 HP, with a 540 RPM PTO. The hydraulic system provides a flow rate of approximately 16 GPM, with options for one or two remote hydraulic valves. The 3-point hitch is a Category II, offering a lift capacity of around 3,600 lbs. The John Deere 3120 was commonly used for row crop farming, hay production, livestock operations, and tillage tasks such as plowing and disking. It stood out from other models in the lineup due to its balanced power-to-weight ratio and its adaptability to a wide range of implements.

Specifications

Engine	John Deere 4.0L Diesel 70 HP
PTO HP	62 HP @ 540 RPM
Transmission	Synchro Range 8F/2R
Hydraulics	16 GPM, 1-2 remotes
3-Point Hitch	Category II, 3600 lbs
Fuel Capacity	25 gallons
Weight	6,335 lbs
Years Produced	1969-1975

Maintenance Tips

Engine Oil & Filter: Change the engine oil and filter every 250 hours using the recommended John Deere engine oil and filter. Regular oil changes are critical for maintaining engine health.
Hydraulic System: Inspect hydraulic fluid levels regularly and change the hydraulic filter every 500 hours. Use only John Deere Hy-Gard hydraulic fluid to ensure optimal performance and prevent wear.
Fuel System: Regularly drain water and sediment from the fuel filter. Consider using a fuel stabilizer during seasonal storage to prevent fuel degradation and injector clogging.
Seasonal Storage: Before storing your 3120 for the off-season, thoroughly clean the tractor, lubricate all grease fittings, and disconnect the battery. Store the battery in a cool, dry place.

History & Background

The John Deere 3120 was introduced in 1969, marking a significant upgrade in the John Deere tractor lineup. It offered improved power and features compared to previous models. While not undergoing major redesigns during its production run, the 3120 cemented its place as a dependable and versatile workhorse in agricultural history, contributing to increased efficiency in various farming operations.

Frequently Asked Questions

What engine is in the John Deere 3120?

The John Deere 3120 is equipped with a John Deere 4.0L (244 cu in) 4-cylinder diesel engine, producing approximately 70 horsepower.

What is the PTO horsepower on a 3120?

The PTO horsepower of the John Deere 3120 is rated at 62 HP, and it operates at 540 RPM.

What oil filter fits the 3120?

The recommended oil filter for the John Deere 3120 is a John Deere AR50041. Common cross-references include Fram PH3600, Wix 51794, and NAPA 1794.

What are common parts needed for the 3120?

Common wear parts for the John Deere 3120 include engine oil filters, fuel filters, hydraulic filters, fan belts, hydraulic cylinder seal kits, steering components (tie rod ends), clutch discs, and pressure plates.

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