John Deere 6120 Tractor Parts
6120 parts and accessories
The John Deere 6120 tractor, manufactured from 2003 to 2007, proved to be a reliable workhorse on farms. Powered by a 4.5L PowerTech diesel engine delivering around 80 horsepower, and boasting a PTO horsepower of approximately 66, this model became popular for its versatility in various agricultural tasks. Farmers appreciated its balance of power, efficiency, and user-friendly design.
The John Deere 6120 was introduced in 2003 as part of the John Deere 6000 series, replacing earlier models and offering updated features and performance. Production continued through 2007. This tractor features a 4.5L John Deere PowerTech 4045T diesel engine, producing approximately 80 horsepower. The engine's displacement is 276 cubic inches (4.5 liters). Transmission options included a SyncroPlus transmission with 12 forward and 4 reverse speeds, or a PowrQuad Plus transmission offering 16 forward and 16 reverse speeds with power shift capabilities. The PTO horsepower is around 66 hp, with a standard 540 RPM PTO, and an optional 540/1000 RPM PTO. Hydraulic capacity is approximately 15.9 GPM (60.2 L/min) with typically two rear remotes. It features a Category II 3-point hitch with a lift capacity of around 5,357 lbs. The John Deere 6120 was commonly used for various farming applications, including row crop work, hay production, livestock operations, and light tillage. What distinguishes it from other models in the lineup is its compact size, balanced power, and fuel efficiency, making it a versatile choice for smaller to medium-sized farms.
Specifications
| Engine | John Deere 4045T 80 HP Diesel |
|---|---|
| PTO HP | 66 HP @ 540/1000 RPM |
| Transmission | SyncroPlus 12x4 or PowrQuad Plus 16x16 |
| Hydraulics | 15.9 GPM, 2 remotes |
| 3-Point Hitch | Category II, 5357 lbs |
| Fuel Capacity | 34.3 gallons |
| Weight | 8,600 lbs |
| Years Produced | 2003-2007 |
Maintenance Tips
- Engine Oil & Filter: Change the engine oil and filter every 250 hours of operation. Use John Deere Plus-50 II oil or equivalent and a genuine John Deere oil filter for optimal engine protection.
- Hydraulic System: Inspect hydraulic fluid levels regularly and change the hydraulic filters every 500 hours. Use only John Deere Hy-Gard fluid to prevent damage to hydraulic components. Check for leaks around hydraulic cylinders and hoses.
- Fuel System: Use clean, high-quality diesel fuel and replace the fuel filter every 500 hours to prevent fuel system issues. Drain water from the fuel/water separator regularly, especially in humid conditions. Consider using a fuel additive during cold weather.
History & Background
The John Deere 6120 was launched in 2003 as a part of the updated 6000 series, designed to provide a modern and efficient tractor for a range of agricultural tasks. There were no major redesigns during its production run, but it represented an advancement in terms of operator comfort and fuel efficiency compared to its predecessors. It solidified John Deere's reputation for producing reliable and versatile tractors.
Frequently Asked Questions
What engine is in the John Deere 6120?
The John Deere 6120 is equipped with a 4.5L John Deere PowerTech 4045T diesel engine, producing approximately 80 horsepower.
What is the PTO horsepower on a 6120?
The PTO horsepower rating on the John Deere 6120 is approximately 66 HP. It offered a standard 540 RPM PTO and an optional 540/1000 RPM PTO.
What oil filter fits the 6120?
The recommended oil filter for the John Deere 6120 is a John Deere filter part number RE504836 or an equivalent cross-reference like a Wix 51348 or a Baldwin B7170.
What are common parts needed for the 6120?
Commonly needed parts for the John Deere 6120 include engine oil filters, fuel filters, air filters, hydraulic filters, fan belts, hydraulic cylinder seal kits, steering cylinder seals, and clutch components (if applicable for mechanical transmissions).

L157637 - RH Housing; MFWD Knuckle
SKU: L157637
9 in stock

L157636 - LH Housing; MFWD Knuckle
SKU: L157636
3 in stock

L156857 - MFWD DRIVESHAFT SEAL
SKU: L156857
63 in stock

L114652 - Front MFWD Axle Bushing
SKU: L114652
155 in stock

L114558 - MFWD Axle Housing Bushing
SKU: L114558
15 in stock

L113966 - MFWD Short Axle Housing Bushing
SKU: L113966
27 in stock

L112112 - Front Wheel; MFWD Bolt
SKU: L112112
190 in stock

L111817 - ZF Axle Support Assy Pin
SKU: L111817
212 in stock

L110240 - Front Axle (MFWD) Shaft
SKU: L110240
8 in stock

L110237 - Planetary Pinion
SKU: L110237
18 in stock

L110236 - Drive Shaft
SKU: L110236
5 in stock

L110233 - MFWD Driveshaft Seal
SKU: L110233
59 in stock

L100632 - Cross & Bearing Kit 28.5mm X 70.5mm
SKU: L100632
43 in stock

L100152 - MFWD Differential (1.2MM Thick) Plate
SKU: L100152
123 in stock

L100151 - MFWD Differential (1.1MM Thick) Plate
SKU: L100151
116 in stock

L100150 - MFWD Differential (1.0MM Thick) Plate
SKU: L100150
38 in stock

JD10250 - Differential Pinion Bearing
SKU: JD10250
78 in stock
AL79950 - MFWD Seal
SKU: AL79950
37 in stock

AL79901 - King Pin Bearing
SKU: AL79901
43 in stock

AL79843 - MFWD Planetary Pinion Bearing
SKU: AL79843
215 in stock

AL65850 - Steering Cylinder Seal Kit
SKU: AL65850
86 in stock

AL57855 - Spindle w/ Fender Mounting Bracket (RH/LH)
SKU: AL57855
55 in stock

AL38381 - Spindle (RH/LH)
SKU: AL38381
12 in stock

AL227049 - MFWD Front Axle Double Jointed Shaft Seal
SKU: AL227049
301 in stock
