John Deere 6603
Power
112 hp
Production
2002-2008
Engine
Turbocharged diesel, 6-cylinder
Transmission
Top Shaft Synchronized (TSS)
Drive
2WD/4WD
From the same series:
Introduction
John Deere 6603 Utility Tractor
The John Deere 6603 is a utility tractor produced between 2002 and 2008 in Saltillo, Mexico. It is designed for general agricultural operations, offering a balance of mechanical simplicity and field performance.
Engine and Performance
The tractor is powered by the John Deere 6068T, a 6.8-liter, 6-cylinder turbocharged diesel engine. It generates a rated power of 112 hp at 2100 engine RPM. The liquid-cooled engine features a 17:1 compression ratio and a bore/stroke of 106 x 127 mm, providing the necessary torque for heavy-duty farm tasks.
Transmission and Drivetrain
The 6603 utilizes a Top Shaft Synchronized (TSS) transmission, which is partially synchronized. It provides 9 forward and 3 reverse gears across three ranges. The system includes a 305mm cerametallic dry disc clutch. Operators must bring the tractor to a complete stop to shift between ranges. The machine is available in both two-wheel drive and four-wheel drive configurations.
Hydraulics and Hitch
The hydraulic system is an open-center design with a pump flow capacity of 15 gpm (56.8 lpm) at a pressure of 2750 psi. It supports 2 or 3 rear valves for implement operation. The rear hitch is a Category II type, featuring mechanical lower-link draft sensing, with a maximum lift capacity of 5,292 lbs at the ends and 4,828 lbs at 24 inches behind the lift point.
Mechanical Features and Dimensions
The tractor is equipped with mechanical wet disc brakes and power steering. A mechanical rear differential lock is standard to assist with traction in difficult field conditions. The wheelbase measures 104.1 inches for the 2WD model and 103.8 inches for the 4WD version, with a ground clearance of 18 inches.
Conclusion
The John Deere 6603 is a reliable utility tractor suited for farmers seeking a straightforward, high-torque machine for general field work and implement management.
Production Information of John Deere, 6603
- Original price was $34,870 in 2004 with 2WD
- Utility tractor
- Built in Saltillo, Mexico
| Manufacturer | John Deere |
|---|
Dimension and Tires Information of John Deere, 6603
| Flanged rear axle | 65.8 inch length [1671 mm] |
|---|---|
| 2WD Wheelbase | 104.1 inches [264 cm] |
| Width | 73 inches (rear fenders) [185 cm] |
| 4WD Length | 171.6 inches [435 cm] |
| 4WD Wheelbase | 103.8 inches [263 cm] |
| 2WD Front tread | 58.7 to 80.4 inches [149 to 204 cm] |
| Ground clearance | 18 inches [45 cm] |
| 2WD Length | 175 inches [444 cm] |
| Rear tread | 59.5 to 79.4 inches [151 to 201 cm] |
| 4WD Front tread | 63.6 to 79.4 inches [161 to 201 cm] |
| Standard tires (ag) | Front: 10.00-16. Rear: 18.4-38 |
|---|---|
| Standard tires (ag)(optional) | Front: 14.9-24. Rear: 18.4-38 |
Engine Specifications of John Deere, 6603
- John Deere 6068T
- Liquid-cooled
- 6-cylinder
- Turbocharged diesel
| Exhaust valve clearance | 0.017 inches [0.432 mm] |
|---|---|
| Intake valve clearance | 0.013 inches [0.330 mm] |
| Compression | 17:1 |
| Starter volts | 12 |
| Firing order | 1-5-3-6-2-4 |
| Displacement | 414 ci [6.8 L] |
| Power | 112 hp [83.5 kW] |
| Rated RPM | 2100 |
| Bore/Stroke | 4.19x5.00 inches [106 x 127 mm] |
| Coolant capacity | 19.5 qts [18.5 L] |
| Oil capacity | 20 qts [18.9 L] |
| Starter power | 4.2 hp [3.1 kW] |
Transmission Information of John Deere, 6603
Transmission variants 1
- Three gears (1-3), plus reverse, (R) in three ranges (A-C). Gear shifts are synchronized. Tractor must be stopped to shift range.
| Transmission | Top Shaft Synchronized (TSS) |
|---|---|
| Oil capacity | 61.2 qts [57.9 L] |
| Clutch | 305mm cerametalic dry disc |
| Type | Partially synchronized |
| Gears | 9 forward and 3 reverse |
Mechanical Specs of John Deere, 6603
- Two- or four-wheel drive
- Mechanical wet disc brakes
- Power steering
- Two-post folding ROPS. ComfortVantage Cab optional.
| Final drives | Inboard planetary |
|---|---|
| Differential lock | Mechanical rear |
Power Information of John Deere, 6603
| Rear PTO | Independent |
|---|---|
| Rear PTO(optional) | 1000@2100 |
| Engine RPM | 540@2100 |
| Clutch | Dry disc |
| Rear PTO Type | 540/1000 |
Hydraulics Specifications of John Deere, 6603
| Type | Open center |
|---|---|
| Total flow | 15 gpm [56.8 lpm] |
| Pump flow | 15 gpm [56.8 lpm] |
| Pressure | 2750 psi [189.6 bar] |
| Rear valves | 2 or 3 |
Three-Point Hitch of John Deere, 6603
| Rear Type | II |
|---|---|
| Rear lift (at 24"/610mm) | 4828 lbs [2189 kg] |
| Control | Mechanical lower-link draft sensing |
| Rear lift (at ends) | 5,292 lbs [2400 kg] |
Electrical System of John Deere, 6603
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Battery CCA | 925 |
| Charging system | Alternator |
| Charging amps | 65 |
Where it sits
With 112 HP, the John Deere 6603 sits between 6403 (102 HP) and 6115D (118 HP) in John Deere's range. Its power puts it in the 70th percentile of 2000s models in our database (2822 machines).
Frequently asked questions
How much horsepower does the John Deere 6603 have?
The John Deere 6603 delivers 112 HP.
What years was the John Deere 6603 produced?
The John Deere 6603 was produced in 2002-2008.
What engine does the John Deere 6603 have?
The John Deere 6603 is powered by a Turbocharged diesel, 6-cylinder engine.
What transmission does the John Deere 6603 use?
The John Deere 6603 uses a Top Shaft Synchronized (TSS) transmission.
Is the John Deere 6603 4WD?
The John Deere 6603 is available in 2WD/4WD.