The engine is a John Deere 6068T turbocharged diesel 6-cylinder liquid-cooled with a displacement of 414ci / 6.8L and a bore/stroke of 4.19x5.00inches / 106x 127mm. It has a power output of 112hp / 83.5kW and a compression ratio of 17:1. The engine has a rated RPM of 2100 and a firing order of 1-5-3-6-2-4. The starter volts are 12 and the starter power is 4.2hp / 3.1kW. The engine has an oil capacity of 20qts / 18.9L and a coolant capacity of 19.5qts / 18.5L. The intake valve clearance is 0.013inches / 0.330mm and the exhaust valve clearance is 0.017inches / 0.432mm.
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Find Suppliers & Request SamplesThe transmission is a partially synchronized Top Shaft Synchronized (TSS) with 9 forward and 3 reverse gears. The clutch is a 305mm cerametalic dry disc. The transmission has three gears (1-3), plus reverse, (R) in three ranges (A-C). Gear shifts are synchronized. The tractor must be stopped to shift range. The engine has a power take-off (PTO) output of 95hp / 70.8kW. The transmission is designed to work with the engine to provide the necessary power and torque to the wheels. The transmission is an essential component of the tractor that ensures smooth and efficient operation.
The brakes are mechanical wet disc brakes. They are designed to provide reliable and consistent stopping power. The brakes are an essential safety feature of the tractor. The John Deere 6603 has a mechanical rear differential lock. The final drives are inboard planetary. The chassis is available in 4x2 2WD/4x4 MFWD 4WD. The steering is power-assisted. The cab is a two-post folding ROPS. Comfort Vantage Cab is optional. The brakes work in conjunction with the transmission and engine to provide the necessary stopping power.
The steering is power-assisted and is designed to provide precise and responsive control of the tractor. The John Deere 6603 has a fuel tank capacity of 41.7gal / 157.8L. The steering is an essential component of the tractor that ensures safe and efficient operation. The steering is designed to work in conjunction with the brakes, transmission, and engine to provide the necessary control and maneuverability.
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Find Suppliers & Request SamplesUsers have reported issues with the transmission, particularly with the 9-speed partially synchronized transmission. Some users have also reported issues with the chassis, final drives, and differential lock. The cab has been reported to be uncomfortable for some users. The brakes have been reported to wear out quickly. Some users have also reported issues with the power steering. However, these issues are not common and can be resolved with proper maintenance and care.
Users appreciate the power and torque of the John Deere 6603. The tractor is also praised for its reliability and durability. Users like the fuel efficiency of the tractor and the ease of maintenance. The tractor is also praised for its versatility and ability to handle a variety of tasks. Users appreciate the comfortable ride and the ease of use of the tractor. The standard tires (ag) are also appreciated for their durability and traction on a variety of terrains.
Power | |
Engine | 112hp / 83.5kW |
Pto (claimed) | 95hp / 70.8kW |
Engine Detail | |
Description | John Deere 6068T turbocharged diesel 6-cylinder liquid-cooled |
Displacement | 414ci / 6.8L |
Bore/stroke | 4.19x5.00inches / 106x 127mm |
Power | 112hp / 83.5kW |
Compression | 17:1 |
Rated Rpm | 2100 |
Firing Order | 1-5-3-6-2-4 |
Starter Volts | 12 |
Starter Power | 4.2hp / 3.1kW |
Oil Capacity | 20qts / 18.9L |
Coolant Capacity | 19.5qts / 18.5L |
Intake Valve Clearance | 0.013inches / 0.330mm |
Exhaust Valve Clearance | 0.017inches / 0.432mm |
Engine | |
Description | John Deere 6.8L 6-cyl diesel |
Fuel Tank | 41.7gal / 157.8L |
Transmission | |
Transmission | Top Shaft Synchronized (TSS) |
Type | partially synchronized |
Gears | 9 forward and 3 reverse |
Clutch | 305mm cerametalic dry disc |
Oil Capacity | 61.2qts / 57.9L |
Description | Three gears (1-3), plus reverse, (R) in three ranges (A-C). Gear shifts are synchronized. Tractor must be stopped to shift range |
Mechanical | |
Chassis | 4x2 2WD/4x4 MFWD 4WD |
Final Drives | inboard planetary |
Differential Lock | mechanical rear |
Steering | power |
Brakes | mechanical wet disc |
Cab | Two-post folding ROPS. Comfort Vantage Cab optional |
Transmission | 9-speed partially synchronized |
Tires | |
Standard Tires (ag) | Front: 10.00-16. Rear: 18.4-38 Front: 14.9-24. Rear: 18.4-38 |
Dimensions | |
2wd Wheelbase | 104.1inches / 264cm |
4wd Wheelbase | 103.8inches / 263cm |
2wd Length | 175inches / 444cm |
4wd Length | 171.6inches / 435cm |
Width | 73inches / 185cm (rear fenders) |
Ground Clearance | 18inches / 45cm |
Rear Axle | Flanged: 65.8inch length / 1671mm |
2wd Front Tread | 58.7 to 80.4inches / 149to 204cm |
4wd Front Tread | 63.6 to 79.4inches / 161to 201cm |
Rear Tread | 59.5 to 79.4inches / 151to 201cm |
Dimensions And Tires | |
2wd Wheelbase | 104.1inches / 264cm |
4wd Wheelbase | 103.8inches / 263cm |
Weight | 8776 to 10252 pounds |
Front Tire | 10.00-16 |
Rear Tire | 18.4-38 |
Serial Numbers | |
Location | Serial number plate on the right side of the tractor frame, above the front axle |
2002 | 1228 |
2003 | 1486 |
2004 | 1908 |
2005 | 2363 |
2006 | 3178 |
2007 | 3986 |
Hydraulics | |
Type | open center |
Pressure | 2750psi / 189.6bar |
Rear Valves | 2 or 3 |
Pump Flow | 15gpm / 56.8lpm |
Total Flow | 15gpm / 56.8lpm |
Tractor Hitch | |
Rear Type | II |
Control | mechanical lower-link draft sensing |
Rear Lift (at Ends) | 5,292lbs / 2400kg |
Rear Lift (at 24 | 4828lbs / 2189kg |
Electrical | |
Ground | negative |
Charging System | alternator |
Charging Amps | 65 |
Battery Cca | 925 |
Battery Volts | 12 |
Power Take Off Pto | |
Rear Pto | independent |
Clutch | dry disc |
Rear Rpm | 540/1000 |
Engine Rpm | 540@2100 / 1000@2100 |
Weight | |
2wd Rops Shipping | 8776lbs / 3980kg |
4wd Rops Shipping | 9361lbs / 4246kg |
2wd Cab Shipping | 9658lbs / 4380kg |
4wd Cab Shipping | 10252lbs / 4650kg |
Height | |
Steering Wheel | 82.3inches / 209cm |
Hood | 70inches / 177cm |
Rops | 110.7inches / 281cm |
Cab | 78inches / 198cm |
Exhaust | 118inches / 299cm |