John Deere 8320

Last Updated: July 2024

Overview

The John Deere 8320 is a front wheel assist row-crop tractor with a 496 ci, six-cylinder turbocharged diesel engine capable of 247.89 hp at 1950 RPM. It has a full power shift transmission with 16 forward and 4 reverse gears. Equipped with hydrostatic power steering and hydraulic wet disc brakes, it has an operating weight of 20,205 lbs (without ballast). Key features include a Category III/IIIN rear hitch with a maximum force of 15,387 lbs, a hydraulic system with a pump flow rate up to 43.8 GPM, and fuel efficiency of 0.371 lb/hp.hr at maximum power. The tractor is designed for row crop applications with a long 120.1 inch height frame.

Key Specifications

Category: Row Crop

Power Output: 247.89

Transmission: full power shift

Drive Type: Front Wheel Assist

Operating Weight: 20205

Fuel Type: Diesel

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John Deere 8320 Tractor

John Deere 8320 vs. Similar Tractors

Power Output

Above Average

Greater than 82% of similar tractors.

Hitch Capacity

Average

Greater than 69% of similar tractors.

Operating Weight

Above Average

Greater than 71% of similar tractors.

Technical Specifications

Engine

Manufacturer: John Deere
Model: -
Cooling Type: liquid-cooled
Cylinder Orientation: inline
Valve Configuration: -
Fuel Type: Diesel
Induction Type: turbocharged
Cylinders: 6
Displacement (ci): 496
Bore (in): 4.56
Stroke (in): 5.06
Rated RPM: 2200
Power Output (hp): 247.89

Transmission

Type: full power shift
Forward Gears: 16
Reverse Gears: 4
Total Gears: -

Dimensions

Length (in): 209.9
Width (in): -
Height (in): 120.1
Operating Weight (lb): 20205

Power Take-Off (PTO)

PTO Type: Independent
PTO Speed 1 (rpm): 1000
PTO Speed 2 (rpm): 540/1000 (optional)
PTO Speed 3 (rpm): -

Miscellaneous

Chassis: 4x4 MFWD 4WD
Drive Type: Front Wheel Assist
Steering Type: hydrostatic power
Coolant Capacity (qts): 35.9
Front Tire Diameter (in): -
Front Tire Width (in): -
Rear Tire Diameter (in): -
Rear Tire Width (in): -
Front/Rear Rim Diameter (in): -
Tire Type: Ag
Manufacture - End Year: 2005
Hitch Type: III/IIIN
Hitch Category: Category 3
Hitch Position: Rear
Hitch Capacity (lb): 15387
Operator Station Type: Cab
Starter Type: Electric
Brake Type: Hydraulic wet disc
Hydraulic System Type: Closed center pressure-flow compensated (PFC)

Test Results

Nebraska Tractor Test Laboratory - Test Date: May 10 - 31, 2002

Maximum Power and Fuel Consumption

Maximum Power: 247.89 HP (184.85 kW) at 1950 rpm
Fuel Consumption at Maximum Power: 13.04 Gal/hr (49.38 l/h) with a fuel efficiency of 0.371 lb/hp.hr (0.226 kg/kW.h)
Rated Power: 218.52 HP (162.95 kW) at 2200 rpm with fuel consumption of 12.57 Gal/hr (47.58 l/h)

Drawbar Performance

Maximum Power (8th Gear): 189.39 HP (141.23 kW) with a drawbar pull of 15054 lbs (66.96 kN) and a speed of 4.72 mph (7.59 km/h)
75% of Pull at Maximum Power (8th Gear): 148.79 HP (110.95 kW) with a drawbar pull of 11290 lbs (50.22 kN) and a speed of 4.94 mph (7.95 km/h)
50% of Pull at Maximum Power (8th Gear): 101.23 HP (75.49 kW) with a drawbar pull of 7525 lbs (33.47 kN) and a speed of 5.04 mph (8.12 km/h)

Torque and Engine Performance

Maximum Torque: 760 lb.-ft. (1030 Nm) at 1300 rpm
Torque Rise: 45.7% with a torque rise at 1801 engine rpm of 31%

Hydraulic Performance

Maximum Force Exerted (Category III Hitch): 15387 lbs (68.4 kN)
Pump Delivery Rate: 35.2 GPM (133.2 l/min) at minimum pressure and rated engine speed
Hydraulic Power: 52.4 HP (39.1 kW) at delivery pressure of 2700 psi (186 bar)

Overall Efficiency

Fuel Efficiency at Standard PTO Speed (1000 rpm): 17.39 Hp.hr/gal (3.42 kW.h/l)
Fuel Consumption: 12.57 Gal/hr (47.58 l/h) at 2200 rpm

NTTL.(2002).Nebraska OECD Tractor test 1798 for John Deere 8320 Diesel. Lincoln, NE:Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2174