John Deere 8320R

Last Updated: July 2024

Overview

The John Deere 8320R is a high-powered row-crop tractor designed for various agricultural applications. This model was manufactured between 2014 and 2019 in Waterloo, Iowa, USA, and is part of the reputable 8R series. It is equipped with a selective gear fixed ratio transmission with full range operator controlled power shift, providing versatility and efficiency in field operations. The 8320R features a robust 9.0L six-cylinder vertical diesel engine that delivers a maximum power output of 318.08 hp at 1899 rpm, with a maximum torque of 1019 lb.-ft. (1381 Nm) at 1599 rpm and a torque rise of 44.8%. The engine is turbocharged and aftercooled, and meets Tier 4B emissions standards with D.E.F exhaust treatment. The tractor's cooling system includes an engine coolant heat exchanger for crankcase oil, as well as a radiator for hydraulic and transmission oil. The CommandView III cab provides a comfortable operating environment, while the tractor's hydrostatic power steering and hydraulic wet disc brakes contribute to its handling and safety. The hydraulic system features dual pumps with a combined flow rate of 84.2 GPM (318.7 l/min) at rated engine speed, and a maximum force exerted of 20254 lbs (90.1 kN) at the hitch points. The tractor's drawbar performance is impressive, with a maximum pull of 19848 lbs (88.29 kN) at a speed of 4.78 mph (7.69 km/h) in 8th gear, and a fuel efficiency of 17.07 Hp.hr/gal (3.36 kW.h/l) at maximum pull.

Key Specifications

Category: Row Crop

Power Output: 318.08 hp at 1899 rpm

Transmission: Selective gear fixed ratio with full range operator controlled power shift

Drive Type: MFWD 4WD

Operating Weight: 32,695 lbs

Fuel Type: Diesel

John Deere 8320R vs. Similar Tractors

Power Output

Above Average

Greater than 89% of similar tractors.

Hitch Capacity

Above Average

Greater than 84% of similar tractors.

Operating Weight

Below Average

Greater than 15% of similar tractors.

Technical Specifications

Engine

Manufacturer: John Deere
Model: PowerTech PSS
Cooling Type: Liquid-cooled; Engine coolant heat exchanger for crankcase oil, radiator for hydraulic and transmission oil
Cylinder Orientation: Vertical
Valve Configuration: 24-valve
Fuel Type: Diesel
Induction Type: Turbocharged aftercooled
Cylinders: 6
Displacement (ci): 548 ci
Bore (in): 4.661 in
Stroke (in): 5.354 in
Rated RPM: 2100
Power Output (hp): 318.08 hp at 1899 rpm

Transmission

Type: Selective gear fixed ratio with full range operator controlled power shift
Forward Gears: 16
Reverse Gears: 4
Total Gears: -

Dimensions

Length (in): 245 inches
Width (in): 137.3 inches (with warning lamps)
Height (in): 129.3 inches (cab)
Operating Weight (lb): 32,695 lbs

Power Take-Off (PTO)

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

Miscellaneous

Chassis: 4x4 MFWD 4WD
Drive Type: MFWD 4WD
Steering Type: Hydrostatic power
Coolant Capacity (qts): 42.3 qts
Front Tire Diameter (in): -
Front Tire Width (in): -
Rear Tire Diameter (in): -
Rear Tire Width (in): -
Front/Rear Rim Diameter (in): -
Tire Type: Ag tires
Manufacture - End Year: 2019
Hitch Type: IVN/III
Hitch Category: Category 3
Hitch Position: Rear
Hitch Capacity (lb): 29300 lbs
Operator Station Type: CommandView III cab (standard)
Starter Type: Electric
Brake Type: Hydraulic wet disc
Hydraulic System Type: Closed-center load sensing pressure flow compensated

Test Results

Nebraska Tractor Test Laboratory - Test Date: October 23 - 31, 2014

Maximum Power and Fuel Consumption

Maximum Power: 318.08 HP (237.19 kW) at 1899 rpm
Fuel Consumption at Maximum Power: 16.36 Gal/hr (61.94 l/h) with a fuel efficiency of 0.362 lb/hp.hr (0.220 kg/kW.h)
DEF Consumption: 0.33 Gal/hr (1.24 l/h)

Drawbar Performance

Power at Maximum Pull (8th Gear): 253.13 HP (188.76 kW) with a drawbar pull of 19848 lbs (88.29 kN) and a speed of 4.78 mph (7.69 km/h)
Fuel Consumption at Maximum Pull: 0.412 lb/hp.hr (0.251 kg/kW.h) with a fuel efficiency of 17.07 Hp.hr/gal (3.36 kW.h/l)
Power at 50% of Maximum Pull (8th Gear): 134.37 HP (100.20 kW) with a drawbar pull of 9945 lbs (44.24 kN) and a speed of 5.07 mph (8.16 km/h)
Fuel Efficiency at 50% Pull: 14.56 Hp.hr/gal (2.87 kW.h/l)

Torque and Engine Performance

Maximum Torque: 1019 lb.-ft. (1381 Nm) at 1599 rpm
Torque Rise: 44.8% with a power increase at 1899 rpm of 13.1%

Hydraulic Performance

Maximum Force Exerted: 20254 lbs (90.1 kN) at hitch points
Pump Delivery Rate: 84.2 GPM (318.7 l/min) at minimum pressure and rated engine speed
Hydraulic Power: 98.7 HP (73.6 kW) at delivery pressure of 2114 psi (146 bar)

Overall Efficiency

Fuel Efficiency at PTO Speed (1000 rpm): 19.26 Hp.hr/gal (3.79 kW.h/l)
Fuel Consumption: 15.98 Gal/hr (60.49 l/h) at 2003 rpm

NTTL. (2014). Nebraska OECD Tractor Test 2101 for John Deere 8320R Diesel. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2531