John Deere 6603

Name: John Deere 6603
Brand: John Deere

Power

112 hp

Production

2002-2008

Engine

Turbocharged diesel, 6-cylinder

Transmission

Top Shaft Synchronized (TSS)

Drive

2WD/4WD

100–140 HP 2000s

From the same series:

6403

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."

Introduction

Production Information of John Deere, 6603

The production information of the tractor (6603) includes details about its manufacturing.

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

This section sums up the dimension and tires information of the tractor.


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
	Front: 14.9-24. Rear: 18.4-38

Engine Specifications of John Deere, 6603

Get the specifications for the engine and if different options are available.

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, 6603Y

Discover all variants of transmission available for this tractor model.

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, 6603Y

This section summarizes all mechanical information such as the brake system and other specifications.

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, 6603Y

Discover the power specifications and options available for this tractor model but also PTO (Power Take-off) information.


Rear PTO	Independent
	1000@2100
Engine RPM	540@2100
Clutch	Dry disc
Rear PTO Type	540/1000

Hydraulics Specifications of John Deere, 6603

Hydraulic system type, pressure, pump flow and valves.


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

Hitch category and rear/front lift capacity.


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

Battery voltage, charging system and ground.


Ground	Negative
Battery volts	12
Battery CCA	925
Charging system	Alternator
Charging amps	65

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.

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