John Deere 6603

Last Updated: June 2024

Overview

The John Deere 6603 is a utility tractor known for its robustness and versatility. Powered by a John Deere 6068T turbocharged diesel engine, it provides a power output of 112 hp. With a 414 cubic inch displacement and a 9-speed partially synchronized transmission, it offers substantial power and control for various farming tasks. The 6603 model features a 2WD chassis, power steering, and an open center hydraulic system. It also boasts a three-point hitch Type II with a notable lift capacity. The tractor's physical dimensions and weight vary slightly between the 2WD and 4WD configurations, as well as between the models with ROPS or a Cab. Designed to cater to various agricultural demands, the John Deere 6603 is a reliable workhorse suitable for a range of field operations.

Key Specifications

Category: Utility

Power Output: 112

Transmission: Partially synchronized

Drive Type: 2WD

Operating Weight: 2WD ROPS: 8776, 4WD ROPS: 9361, 2WD Cab: 9658, 4WD Cab: 10252

Fuel Type: Diesel

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John Deere 6603 Tractor

John Deere 6603 vs. Similar Tractors

Power Output

Above Average

Greater than 86% of similar tractors.

Hitch Capacity

Above Average

Greater than 75% of similar tractors.

Technical Specifications

Engine

Manufacturer: John Deere
Model: 6068T
Cooling Type: Liquid-cooled
Cylinder Orientation: -
Valve Configuration: -
Fuel Type: Diesel
Induction Type: Turbocharged
Cylinders: 6
Displacement (ci): 414
Bore (in): 4.19
Stroke (in): 5
Rated RPM: 2100
Power Output (hp): 112

Transmission

Type: Partially synchronized
Forward Gears: 9
Reverse Gears: 3
Total Gears: -

Dimensions

Length (in): 2WD: 175, 4WD: 171.6
Width (in): 73
Height (in): ROPS: 110.7, Cab: 78
Operating Weight (lb): 2WD ROPS: 8776, 4WD ROPS: 9361, 2WD Cab: 9658, 4WD Cab: 10252

Power Take-Off (PTO)

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

Miscellaneous

Chassis: 4x2 2WD
Drive Type: 2WD
Steering Type: Power
Coolant Capacity (qts): 19.5
Front Tire Diameter (in): -
Front Tire Width (in): -
Rear Tire Diameter (in): -
Rear Tire Width (in): -
Front/Rear Rim Diameter (in): -
Tire Type: Standard tires (ag)
Manufacture - End Year: -
Hitch Type: Three-Point Hitch
Hitch Category: II
Hitch Position: Rear
Hitch Capacity (lb): 4828
Operator Station Type: -
Starter Type: Electric Starter
Brake Type: -
Hydraulic System Type: Open center

Test Results

Nebraska Tractor Test Laboratory - Test Date: September 6-23, 2002

Maximum Power and Fuel Consumption

Rated Engine Speed (PTO speed—1016 rpm): 97.02 HP (72.35 kW) at 2100 rpm, Fuel consumption at 5.67 Gal/hr (21.47 l/h) with a fuel efficiency of 0.411 lb/hp.hr (0.250 kg/kW.h) and 17.11 Hp.hr/gal (3.37 kW.h/l)
Standard Power Take-off Speed (PTO speed—1000 rpm): 98.37 HP (73.35 kW) at 2066 rpm, Fuel consumption at 5.67 Gal/hr (21.47 l/h) with a fuel efficiency of 0.405 lb/hp.hr (0.246 kg/kW.h) and 17.34 Hp.hr/gal (3.42 kW.h/l)
Maximum Power (2 hours): 101.71 HP (75.85 kW) at 1950 rpm, Fuel consumption at 5.65 Gal/hr (21.38 l/h) with a fuel efficiency of 0.390 lb/hp.hr (0.237 kg/kW.h) and 18.01 Hp.hr/gal (3.55 kW.h/l)

Drawbar Performance

Maximum Power—5th (B2) Gear: 82.01 HP (61.16 kW) with a drawbar pull of 6006 lbs (26.72 kN) at a speed of 5.12 mph (8.24 km/h), Fuel consumption at 0.488 lb/hp.hr (0.297 kg/kW.h) and fuel efficiency of 14.40 Hp.hr/gal (2.84 kW.h/l)
75% of Pull at Maximum Power—5th (B2) Gear: 65.95 HP (49.18 kW) with a drawbar pull of 4500 lbs (20.01 kN) at a speed of 5.50 mph (8.85 km/h), Fuel consumption at 0.537 lb/hp.hr (0.327 kg/kW.h) and fuel efficiency of 13.07 Hp.hr/gal (2.57 kW.h/l)

Torque and Engine Performance

Maximum Torque: 333 lb.-ft. (452 Nm) at 1101 rpm
Torque Rise: 37.4%

Hydraulic Performance

Maximum Force Exerted: 4878 lbs (21.7 kN) at hitch points
Pump Delivery Rate: 16.6 GPM (62.8 l/min) at minimum pressure and rated engine speed
Hydraulic Power: 22.8 HP (17.0 kW) at delivery pressure of 2610 psi (180 bar)

Overall Efficiency

Fuel Efficiency at Standard PTO Speed (1000 rpm): 17.34 Hp.hr/gal (3.42 kW.h/l)
Fuel Consumption: 5.67 Gal/hr (21.47 l/h) at 2066 rpm

Nebraska Tractor Test Lab. (2002). Test 1809: John Deere 6603 Diesel 9-Speed. University of Nebraska-Lincoln. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2179