John Deere 8320RT

Last Updated: July 2024

Overview

The John Deere 8320RT is an agricultural crawler tractor equipped with a sophisticated 4-wheel drive system and a selective gear fixed ratio transmission with 16 forward and 16 reverse gears. Its heart is a John Deere PowerTech PSS 9.0L 6-cylinder turbocharged aftercooled diesel engine, which delivers a rated power of 261.34 hp at 2100 RPM based on independent test results. The engine features advanced cooling systems, including 2 thermostats, a variable speed fan, and heat exchangers for crankcase oil, hydraulic oil, and transmission oil. The tractor's hydraulic system is direct engine-driven, capable of exerting a maximum force of 21,167 lbs through the hitch. Brakes are wet multiple disc hydraulically actuated. Sound levels are 70.7 dB(A) in 8th gear at no load and 78.1 dB(A) in 16th gear at no load. The robust chassis, paired with a long 99-inch wheelbase and a track width of 25.0 inches, provides stable operation across various terrains.
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Key Specifications

Category: Agricultural, Crawler

Power Output: 261.34

Transmission: Selective gear fixed ratio with full range operator controlled power shift (16 speed)

Drive Type: 4WD

Fuel Type: Diesel

John Deere 8320RT vs. Similar Tractors

Power Output
Excellent
Greater than 99% of similar tractors.

Technical Specifications

Engine

Manufacturer
John Deere
Model
PowerTech PSS
Cooling Type
Liquid-cooled
Cylinder Orientation
Inline
Valve Configuration
24-valve
Fuel Type
Diesel
Induction Type
Turbocharged aftercooled
Cylinders
6
Displacement (ci)
548
Bore (in)
4.661
Stroke (in)
5.354
Rated RPM
2100
Power Output (hp)
261.34

Transmission

Type
Selective gear fixed ratio with full range operator controlled power shift (16 speed)
Forward Gears
16
Reverse Gears
16
Total Gears
-

Dimensions

Length (in)
223.5
Width (in)
150
Height (in)
130.8
Operating Weight (lb)
-

Power Take-Off (PTO)

PTO Type
-
PTO Speed 1 (rpm)
-
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
4x4 MFWD 4WD
Drive Type
4WD
Steering Type
Electro-hydraulic power
Coolant Capacity (qts)
42.3
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
-
Hitch Type
IVN/III
Hitch Category
Category 3
Hitch Position
Rear
Hitch Capacity (lb)
-
Operator Station Type
Cab
Starter Type
12 volt electric
Brake Type
-
Hydraulic System Type
Direct engine drive

Test Results

Nebraska Tractor Test Laboratory - Test Date: April 13 to April 21, 2010

Maximum Power and Fuel Consumption

  • Maximum Power (1 hour): 297.43 HP (221.79 kW) at 1749 rpm
  • Fuel Consumption at Maximum Power: 15.89 Gal/hr (60.16 l/h) with a fuel efficiency of 0.375 lb/hp.hr (0.228 kg/kW.h)
  • Standard PTO Speed (1000 rpm): 286.68 HP (213.78 kW) at 2004 rpm
  • Fuel Efficiency at Standard PTO Speed: 18.54 Hp.hr/gal (3.65 kW.h/l)

Drawbar Performance

  • Maximum Power in 8th Gear: 225.14 HP (167.89 kW) with a drawbar pull of 18639 lbs (82.91 kN) and a speed of 4.53 mph (7.29 km/h)
  • Fuel Consumption at Maximum Power in 8th Gear: 0.446 lb/hp.hr (0.271 kg/kW.h) with a fuel efficiency of 15.76 Hp.hr/gal (3.10 kW.h/l)
  • Maximum Torque: 978 lb.-ft. (1325 Nm) at 1501 rpm
  • Torque Rise: 49.7% with a power increase at 1749 rpm of 13.8%

Hydraulic Performance

  • Maximum Force Exerted: 21167 lbs (94.2 kN) through the whole range
  • Pump Delivery Rate at Maximum Hydraulic Power: 47.4 GPM (179.5 l/min) with a delivery pressure of 2740 psi (189 bar)
  • Hydraulic Power: 75.8 HP (56.5 kW)

Overall Efficiency

  • Fuel Efficiency at Standard PTO Speed (1000 rpm): 18.54 Hp.hr/gal (3.65 kW.h/l)
  • Fuel Consumption at Rated Engine Speed: 14.32 Gal/hr (54.19 l/h) with a fuel efficiency of 18.26 Hp.hr/gal (3.60 kW.h/l)



NTTL.(2010).Nebraska OECD Tractor test 1971 for John Deere 8320RT Diesel. Lincoln, NE:Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2387

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