John Deere 8320T

Last Updated: July 2024

Overview

The John Deere 8320T is a track tractor with a selective gear fixed ratio transmission and full range operator controlled power shift. Its turbocharged and air-to-air aftercooled 8.1L inline 6-cylinder diesel engine delivers a rated power of 217.63 hp at 2200 rpm and a maximum power of 246.65 hp at 2000 rpm. It features electro-hydraulic differential steering controlled by a steering wheel. The tractor has a maximum torque of 780 lb.-ft. at 1405 rpm and a torque rise of 50.2%, with a 33% rise at 1802 rpm. The hydraulic system can exert a maximum force of 16,520 lbs at the hitch points, with a pump delivery rate of 34.6 GPM and hydraulic power of 49.7 HP at 2490 psi. The fuel consumption at rated speed is 12.86 Gal/hr with an efficiency of 0.416 lb/hp.hr.

Key Specifications

Category: Crawler

Power Output: 217.63 hp at 2200 rpm (rated engine speed); 246.65 hp at 2000 rpm (maximum power)

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

Drive Type: Track

Operating Weight: 26,735 (unladen tractor mass)

Fuel Type: No. 2 Diesel

John Deere 8320T vs. Similar Tractors

Power Output

Excellent

Greater than 95% of similar tractors.

Operating Weight

Poor

Greater than 6% of similar tractors.

Technical Specifications

Engine

Manufacturer: John Deere Diesel
Model: 8.1 L
Cooling Type: Liquid-cooled
Cylinder Orientation: Inline
Valve Configuration: -
Fuel Type: No. 2 Diesel
Induction Type: Turbocharged with air-to-air aftercooler
Cylinders: 6
Displacement (ci): 496
Bore (in): 4.56
Stroke (in): 5.06
Rated RPM: 2200
Power Output (hp): 217.63 hp at 2200 rpm (rated engine speed); 246.65 hp at 2000 rpm (maximum power)

Transmission

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

Dimensions

Length (in): 207
Width (in): 103.7
Height (in): 122.9
Operating Weight (lb): 26,735 (unladen tractor mass)

Power Take-Off (PTO)

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

Miscellaneous

Chassis: Track
Drive Type: Track
Steering Type: Electro-hydraulic differential steering controlled by steering wheel
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: Track
Manufacture - End Year: -
Hitch Type: Three-point hitch
Hitch Category: Category 3
Hitch Position: Rear
Hitch Capacity (lb): -
Operator Station Type: Cab
Starter Type: Electric
Brake Type: -
Hydraulic System Type: Closed center pressure flow compensated (PFC)

Test Results

Nebraska Tractor Test Laboratory - Test Date: May 16 to 31, 2002

Maximum Power and Fuel Consumption

Rated Engine Speed: 217.63 HP (162.29 kW) at 2200 rpm
Fuel Consumption at Rated Speed: 12.86 Gal/hr (48.69 l/h) with a fuel efficiency of 0.416 lb/hp.hr (0.253 kg/kW.h)
Maximum Power: 246.65 HP (183.93 kW) at 2000 rpm with a fuel consumption of 13.41 Gal/hr (50.75 l/h)

Drawbar Performance

Maximum Power in 10th Gear: 184.86 HP (137.85 kW) with a drawbar pull of 13,229 lbs (58.85 kN) and a speed of 5.24 mph (8.43 km/h)
Fuel Consumption at Max Power in 10th Gear: 0.486 lb/hp.hr (0.296 kg/kW.h) with a fuel efficiency of 14.48 Hp.hr/gal (2.85 kW.h/l)

Torque and Engine Performance

Maximum Torque: 780 lb.-ft. (1058 Nm) at 1405 rpm
Torque Rise: 50.2%, with a torque rise of 33% at 1802 engine rpm

Hydraulic Performance

Maximum Force Exerted: 16520 lbs (73.5 kN) at hitch points
Pump Delivery Rate at Minimum Pressure: 34.6 GPM (131.0 l/min)
Hydraulic Power: 49.7 HP (37.1 kW) at a delivery pressure of 2490 psi (172 bar)

Overall Efficiency

Fuel Efficiency at Standard PTO Speed (1009 rpm): 16.92 Hp.hr/gal (3.33 kW.h/l)
Fuel Consumption: 12.86 Gal/hr (48.69 l/h) at 2200 rpm

NTTL. (2002). Nebraska OECD Tractor Test 1799 for John Deere 8320T Diesel. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2175