John Deere 6603 Utility Tractors Specifications

Engine

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.

Transmission

The 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.

Brakes

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.

Steering

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.

Common Problems

Users 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.

What Users Like

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.

Techincal Specifications

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