John Deere

John Deere 6403

The John Deere 6403 is a utility tractor from the 6003 Series produced from 2002 to 2008. It features a 4.5L 4-cylinder turbocharged diesel engine producing 102 hp, with a 9-speed partially synchronized transmission. Built in Saltillo, Mexico, it offers two- or four-wheel drive options, mechanical wet disc brakes, and a two-post folding ROPS with an optional ComfortVantage Cab. The tractor has a fuel tank capacity of 41.7 gallons and hydraulic system with open center type and 2750 psi pressure. Dimensions vary slightly between 2WD and 4WD models, with weights ranging from 7695 to 8987 pounds depending on configuration. The PTO is independent with dry disc clutch and operates at 540/1000 RPM. The 6403 is part of the 6003 Series and is related to models 6100D and 6603.

Power102 hp

Founded2002 - 2008

Model6403

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Technical Specifications

Detailed specifications and technical data for John Deere 6403

Power

Engine	102 hp (76.1 kW)
PTO (tested)	89.43 hp (66.7 kW)
PTO (claimed)	85 hp (63.4 kW)
Drawbar (tested)	72.87 hp (54.3 kW)

Engine

Type	John Deere 4.5L 4-cyl diesel turbocharged diesel
Power	102 hp (76.1 kW)
Fuel tank	41.7 gal (157.8 L)
Rated RPM	2100
Bore/Stroke	4.19x5.00 inches (106 x 127 mm)
Compression	17:1
Displacement	276 ci (4.5 L)
Firing order	1-3-4-2
Oil capacity	13 qts (12.3 L)
Starter volts	12
Coolant capacity	14.3 qts (13.5 L)

Height

ROPS	108.7 inches (276 cm)
Exhaust	113.5 inches (288 cm)
2WD Hood	68.3 inches (173 cm)
4WD Hood	67.9 inches (172 cm)
Steering wheel	80.3 inches (203 cm)
Height (Folded ROPS)	81.4 inches (206 cm)

Weight

Ballasted	11515 lbs (5223 kg)
2WD Cab Shipping	8580 lbs (3891 kg)
4WD Cab Shipping	8987 lbs (4076 kg)
2WD ROPS Shipping	7695 lbs (3490 kg)
4WD ROPS Shipping	8130 lbs (3687 kg)
4WD ROPS Operating	8750 lbs (3969 kg)

Dimensions

Width	73 inches (rear fenders) (185 cm)
2WD Length	162.4 inches (412 cm)
4WD Length	163.1 inches (414 cm)
Rear tread	59.5 to 79.4 inches (151 to 201 cm)
2WD Wheelbase	91.3 inches (231 cm)
4WD Wheelbase	90.9 inches (230 cm)
2WD Front tread	58.7 to 80.4 inches (149 to 204 cm)
4WD Front tread	59.7 to 79.4 inches (151 to 201 cm)
Flanged rear axle	65.8 inch length (1671 mm)

Electrical

Ground	negatve
Battery CCA	925
Battery volts	12
Charging amps	65
Charging system	alternator

Hydraulics

Type	open center
Pressure	2750 psi (189.6 bar)
Pump flow	12.1 gpm (45.8 lpm)
Total flow	15 gpm (56.8 lpm)
Rear valves	2 or 3

Mechanical

ROPS	Two-post folding ROPS. ComfortVantage Cab optional.
Drive	Two- or four-wheel drive
Brakes	Mechanical wet disc brakes
Final drives	inboard planetary
Power steering	Yes
Differential lock	mechanical rear

Production

Series	6003 Series
Built in	Saltillo, Mexico
Category	Utility tractor
Original price	$30,942 in 2004 with 2WD
Years produced	2002 - 2008

Transmission

Type	Top Shaft Synchronized (TSS), partially synchronized
Gears	9 forward and 3 reverse
Notes	Three gears (1-3), plus reverse, (R) in three ranges (A-C). Gear shifts are synchronized. Tractor must be stopped to shift range.
Clutch	305mm cerametalic dry disc

Tractor hitch