| Manufacturer | John Deere |
| Price | 34,870(USD) |
| Model | 6603 |
| Equipment Type | Utility Tractors |
| Factory | Saltillo, Mexico |
JOHN DEERE 6603 POWER
| Engine | 112hp / 83.5kW |
| PTO (claimed) | 95hp / 70.8kW |
ENGINE DETAIL
The John Deere 6603 is powered by a robust 6.8L turbocharged diesel engine, delivering 112 hp at 2,100 RPM, providing substantial torque and efficiency for heavy-duty applications. Its 17:1 compression ratio enhances fuel efficiency but may necessitate higher-quality diesel to avoid knocking. With significant oil and coolant capacities (20 quarts and 19.5 quarts, respectively), it supports prolonged operation but requires diligent maintenance to manage engine temperatures and lubrication under demanding conditions.
| 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 |
JOHN DEERE 6603 ENGINE
The John Deere 6603 features a robust 6.8L 6-cylinder diesel engine, providing reliable power for various agricultural applications. With a fuel tank capacity of 41.7 gallons (157.8 liters), it offers extended operational range, ideal for long hours in the field without frequent refueling. However, its larger size and weight may present challenges in maneuverability in tighter spaces.
| Description | John Deere 6.8L 6-cyl diesel |
| Fuel tank | 41.7gal / 157.8L |
TRANSMISSION
The John Deere 6603 features a partially synchronized Top Shaft Synchronized (TSS) transmission, allowing smoother gear transitions across its 9 forward and 3 reverse gears, although shifting ranges A-C requires the tractor to be stationary, which may impede efficiency in certain tasks. The 305mm cerametalic dry disc clutch provides durability under heavy loads, but users should be aware of potential heat buildup during prolonged use. With an oil capacity of 61.2 quarts, maintaining proper lubrication is crucial for optimal performance and longevity of the transmission components.
| 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
The John Deere 6603 features a robust 4WD option, enhancing traction and stability for challenging terrains, making it ideal for diverse agricultural applications. The inboard planetary final drives improve durability and efficiency under load, while the mechanical rear differential lock allows for improved traction in slippery conditions. However, the partially synchronized 9-speed transmission may demand careful gear management to prevent transmission wear under high-load scenarios.
| 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 |
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 |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | dry disc |
| Rear RPM | 540/1000 |
| Engine RPM | 540@2100 / 1000@2100 |
JOHN DEERE 6603 TIRES
The John Deere 6603 tractor equipped with standard agricultural tires (10.00-16 front and 18.4-38 rear) provides optimal traction and stability for field operations, particularly in tillage and planting scenarios. The versatility of selecting between 14.9-24 front tires enhances maneuverability in tighter spaces, but may decrease flotation in softer soils compared to the larger front option. Consideration of tire configurations and soil conditions is crucial for maximizing efficiency and minimizing soil compaction during operation.
| 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 |
JOHN DEERE 6603 WEIGHT
| 2WD ROPS Shipping | 8776lbs / 3980kg |
| 4WD ROPS Shipping | 9361lbs / 4246kg |
| 2WD Cab Shipping | 9658lbs / 4380kg |
| 4WD Cab Shipping | 10252lbs / 4650kg |
JOHN DEERE 6603 HEIGHT
| Steering wheel | 82.3inches / 209cm |
| Hood | 70inches / 177cm |
| ROPS | 110.7inches / 281cm |
| Cab | 78inches / 198cm |
| Exhaust | 118inches / 299cm |
DIMENSIONS & TIRES
The John Deere 6603 offers a robust weight range of 8,776 to 10,252 pounds, providing substantial stability for agricultural tasks. Its 2WD configuration with a longer wheelbase facilitates better handling and ride comfort on flat terrains, while the 4WD variant enhances traction and performance in challenging conditions. Notably, the larger rear tires (18.4-38) improve ground contact and flotation, making it suitable for heavier field operations but may lead to increased soil compaction in sensitive areas.
| 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 |
6603 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 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 65 |
| Battery CCA | 925 |
| Battery volts | 12 |