John Deere 6403

The John Deere 6403 is a tractor produced by John Deere. It is equipped with a 276 ci 4.5 L engine. The rated power output is 102 hp 76.1 kW. Transmission: Top Shaft Synchronized (TSS). Operating weight: 7695 to 8987 pounds.

Overview

	2002 - 2008 6003 SeriesUtility tractor
2002 - 2008
6003 Series
Utility tractor

Production
Manufacturer	John Deere
Utility tractor
Built in Saltillo, Mexico
Original price was $30,942 in 2004 with 2WD

John Deere 6403 Engine
John Deere 4.5L 4-cyl diesel
Fuel tank	41.7 gal 157.8 L
Engine details ...

John Deere 6403 Transmission
9-speed partially synchronized
Transmission details ...

John Deere 6403 Power
Engine	102 hp 76.1 kW
PTO (claimed)	85 hp 63.4 kW
Drawbar (tested)	72.87 hp 54.3 kW
PTO (tested)	89.43 hp 66.7 kW
Performance test details ...

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

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

Tractor hitch
Rear Type	II
Control	mechanical lower-link draft sensing
Rear lift (at 24"/610mm)	4828 lbs 2189 kg

Power Take-off (PTO)
Rear PTO	independent
Clutch	dry disc
Rear PTO Type	540/1000
Engine RPM	540@2100
	1000@2100

Dimensions & Tires
2WD Wheelbase	91.3 inches 231 cm
4WD Wheelbase	90.9 inches 230 cm
Weight	7695 to 8987 pounds
Front tire	10.00-16
Rear tire	18.4-34
Full dimensions and tires ...

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

References
6003 Series published in 2005, by John Deere
Operator's Manual 6403 and 6603 Tractors (OMRE226033) published in 2009

Engine

Engine Detail — 276 ci / 4.5 L Diesel

Manufacturer	John Deere
Configuration	turbocharged diesel, 4-cylinder, liquid-cooled
Displacement	276 ci 4.5 L
Bore/Stroke	4.19x5.00 inches 106 x 127 mm
Power	102 hp 76.1 kW
Compression	17:1
Rated RPM	2100
Firing order	1-3-4-2
Starter volts	12
Oil capacity	13 qts 12.3 L
Coolant capacity	14.3 qts 13.5 L

Transmission

Transmission — Top Shaft Synchronized (TSS)

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

Dimensions

John Deere 6403 Tires
Standard tires (ag)	Front: 10.00-16. Rear: 18.4-34
	Front: 13.6-24. Rear: 18.4-34

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

John Deere 6403 Weight
2WD ROPS Shipping	7695 lbs 3490 kg
4WD ROPS Shipping	8130 lbs 3687 kg
2WD Cab Shipping	8580 lbs 3891 kg
4WD Cab Shipping	8987 lbs 4076 kg
4WD ROPS Operating	8750 lbs 3969 kg
Ballasted	11515 lbs 5223 kg

John Deere 6403 Height
Steering wheel	80.3 inches 203 cm
2WD Hood	68.3 inches 173 cm
4WD Hood	67.9 inches 172 cm
ROPS	108.7 inches 276 cm
Height (Folded ROPS)	81.4 inches 206 cm
Exhaust	113.5 inches 288 cm

Tests

OCED Tractor Test 1808
Diesel 9-speed 4WD September 10 - 23, 2002 Link: OCED Tractor Test 1808 file
PTO performance
Max power	89.43 hp 66.7 kW
Fuel use	5.1 gal/hour 19.3 l/hour
Power at rated engine speed	86.77 hp 64.7 kW
Fuel use	5.1 gal/hour 19.3 l/hour
Power at rated PTO speed	88.09 hp 65.7 kW
Fuel use	5.2 gal/hour 19.7 l/hour
Drawbar performance
Max power	72.87 hp 54.3 kW