John Deere 7420

Last Updated: June 2024

Overview

The John Deere 7420 is a 2WD or 4WD row-crop tractor from the 7020 series. This tractor was manufactured by John Deere in Waterloo, Iowa, USA from 2003 to 2007. The JD 7420 is equipped with a 6.8 L (414.0 cu·in) six-cylinder diesel engine and one of three transmission variants: a 16-speed partial power shift, a 24-speed AutoQuad, or an Infinitely Variable Transmission (IVT). Notable features include power steering, hydraulic wet disc brakes, and a ComfortGard Cab with air-conditioning. The tractor provides a diverse range of hitch lift capacities up to 8959.6 lbs and operates on tires sized 14.9R28 for the front and 18.4R38 for the rear. With a weight of 13280 lbs, the 7420 is designed to handle various row-crop farming tasks efficiently.
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Key Specifications

Category: Row Crop

Power Output: 135

Transmission: Partial power shift/Infinitely Variable Transmission (IVT)

Operating Weight: 13280

Fuel Type: Diesel

Lift Capacity: 8959.6

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John Deere 7420 Tractor John Deere 7420 Tractor John Deere 7420 Tractor John Deere 7420 Tractor John Deere 7420 Tractor John Deere 7420 Tractor John Deere 7420 Tractor John Deere 7420 Tractor John Deere 7420 Tractor John Deere 7420 Tractor

John Deere 7420 vs. Similar Tractors

Power Output
Average
Greater than 45% of similar tractors.
Hitch Capacity
Average
Greater than 55% of similar tractors.
Operating Weight
Average
Greater than 53% of similar tractors.

Technical Specifications

Engine

Manufacturer
John Deere
Model
PowerTech 6068HF475
Cooling Type
Liquid-cooled
Cylinder Orientation
Inline
Valve Configuration
-
Fuel Type
Diesel
Induction Type
Turbocharged
Cylinders
6
Displacement (ci)
414
Bore (in)
4.17
Stroke (in)
5
Rated RPM
2100
Power Output (hp)
135

Transmission

Type
Partial power shift/Infinitely Variable Transmission (IVT)
Forward Gears
16/24/Infinite
Reverse Gears
16/24/Infinite
Total Gears
-

Dimensions

Length (in)
203.3
Width (in)
96
Height (in)
114.1
Operating Weight (lb)
13280

Power Take-Off (PTO)

PTO Type
Independent with electro-hydraulic clutch/Optional Transmission or Live PTO
PTO Speed 1 (rpm)
540/1000
PTO Speed 2 (rpm)
1000 (Optional Front PTO)
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
4x2 2WD/4x4 MFWD 4WD
Drive Type
-
Steering Type
Power
Coolant Capacity (qts)
29.6
Front Tire Diameter (in)
-
Front Tire Width (in)
-
Rear Tire Diameter (in)
-
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
-
Manufacture - End Year
2007
Hitch Type
-
Hitch Category
Category 3
Hitch Position
-
Hitch Capacity (lb)
8959.6
Operator Station Type
ComfortGard Cab (standard) with air-conditioning
Starter Type
Electric
Brake Type
Hydraulic wet disc
Hydraulic System Type
Closed-center PFC

Test Results

Nebraska Tractor Test Laboratory - Test Date: May 20 to June 2, 2003

Maximum Power and Fuel Consumption

  • Maximum Power: 127.38 HP (94.99 kW) at 1801 rpm
  • Fuel Consumption at Maximum Power: 6.81 Gal/hr (25.79 l/h) with a fuel efficiency of 0.373 lb/hp.hr (0.227 kg/kW.h)
  • Fuel Efficiency at Rated Engine Speed: 17.29 Hp.hr/gal (3.41 kW.h/l)

Drawbar Performance

  • Power at 7th Gear (B3): 102.86 HP (76.70 kW) with a drawbar pull of 8738 lbs (38.87 kN) and a speed of 4.41 mph (7.10 km/h)
  • Fuel Consumption at 7th Gear (B3): 0.458 lb/hp.hr (0.279 kg/kW.h) with a fuel efficiency of 15.25 Hp.hr/gal (3.00 kW.h/l)

Torque and Engine Performance

  • Maximum Torque: 414 lb.-ft. (561 Nm) at 1398 rpm
  • Torque Rise: 41.9% with a power increase at 1702 rpm of 33%

Hydraulic Performance

  • Maximum Force Exerted (2x85 mm cylinders): 8967 lbs (39.9 kN)
  • Pump Delivery Rate: 30.4 GPM (115.1 l/min) at delivery pressure of 2504 psi (173 bar)
  • Hydraulic Power: 44.4 HP (33.1 kW)



Nebraska Tractor Test Lab. (2003). Test 1817: John Deere 7420 Powrquad Diesel 20-Speed. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2161

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