John Deere 8400T

Last Updated: July 2024

Overview

The John Deere 8400T is a robust agricultural crawler tractor produced between 1997 and 1999. It features a 6-cylinder, 496 ci, turbocharged intercooled diesel engine that delivers 226.73 hp at 2000 RPM and a maximum torque of 795 lb-ft at 1199 RPM. Key performance metrics from independent testing include a fuel consumption of 13 gal/hr at maximum power, a torque rise of 47.1%, a hydraulic power output of 43.3 hp, and a drawbar performance of 195.75 hp in 9th gear. The tractor has a full powershift transmission with 16 forward and 4 reverse gears, hydrostatic power steering, and a 3-point hitch with a 15,650 lb capacity. Additional details cover aspects like cooling system, lubrication, fuel specifications, and electrical system.

Key Specifications

Power Output: 226.73

Transmission: Full powershift

Drive Type: Track

Operating Weight: 25000

Fuel Type: Diesel

Lift Capacity: 15650

Technical Specifications

Engine

Manufacturer: John Deere
Model: Serial No.*RG6081 H040198*
Cooling Type: Liquid-cooled
Cylinder Orientation: Inline
Valve Configuration: -
Fuel Type: Diesel
Induction Type: Turbocharged intercooled
Cylinders: 6
Displacement (ci): 496
Bore (in): 4.57
Stroke (in): 5.08
Rated RPM: 2200
Power Output (hp): 226.73

Transmission

Type: Full powershift
Forward Gears: 16
Reverse Gears: 4
Total Gears: 20

Dimensions

Length (in): 207
Width (in): 103.7 (minimum)
Height (in): 122.9
Operating Weight (lb): 25000

Power Take-Off (PTO)

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

Miscellaneous

Chassis: Crawler
Drive Type: Track
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: -
Manufacture - End Year: 1999
Hitch Type: Three-Point Hitch
Hitch Category: Category 3
Hitch Position: Rear
Hitch Capacity (lb): 15650
Operator Station Type: Cab (CommandView Cab as per data)
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: April 8 to May 1, 1998

Maximum Power and Fuel Consumption

Maximum Power: 226.73 HP (169.08 kW) at 2000 rpm
Fuel Consumption at Maximum Power: 13.00 Gal/hr (49.21 l/h) with a fuel efficiency of 0.404 lb/hp.hr (0.246 kg/kW.h)

Drawbar Performance

Maximum Power (9th Gear): 195.75 HP (145.97 kW) with a drawbar pull of 15925 lbs (70.84 kN) and a speed of 4.61 mph (7.42 km/h)
Fuel Consumption at Maximum Power: 0.468 lb/hp.hr (0.284 kg/kW.h) with a fuel efficiency of 15.09 Hp.hr/gal (2.97 kW.h/l)

Torque and Engine Performance

Maximum Torque: 795 lb.-ft. (1078 Nm) at 1199 rpm
Torque Rise: 47.1%

Hydraulic Performance

Maximum Force Exerted: 15749 lbs (70.1 kN)
Pump Delivery Rate: 31.0 GPM (117.3 l/min) at delivery pressure of 2890 psi (199 bar)
Hydraulic Power: 43.3 HP (32.3 kW) at delivery pressure of 2500 psi (172 bar)

Overall Efficiency

Fuel Efficiency at Standard PTO Speed (1000 rpm): 17.44 Hp.hr/gal (3.44 kW.h/l)

NTTL.(1998).Nebraska OECD Tractor test 1747 for John Deere 8400T Diesel 16-Speed. Lincoln, NE:Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2055