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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 listed engine power is Diesel (listed): 102 hp / 76.1 kW. Transmission: Top Shaft Synchronized (TSS). Operating weight: 7695 to 8987 pounds.

Engine Power
Diesel (listed): 102 hp / 76.1 kW
Fuel & Capacities
41.7 gal 157.8 L
Transmission
Top Shaft Synchronized (TSS)
Operating Weight
7695 to 8987 pounds

Overview

John Deere 6403 tractor photo
2002 - 2008 6003 SeriesUtility tractor 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
6403 references literature
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.
6403 Top Shaft Synchronized (TSS) partially synchronized speeds

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

Recommended Implements & Sizing Guide

Engineering recommendations for John Deere 6403 based on its 102 HP power envelope and ASAE agricultural standards.

Implement & OperationRecommended SizeWorkload RatingEngineering Notes
Moldboard PlowPrimary Tillage
4 to 5 Bottom (16-18")4 - 5 铧 (40-45 cm)Heavy DutyHeavy primary tillage; semi-mounted hitch recommended.
Rotary Cutter / MowerMowing & Clearing
10 to 12 ft Flex-Wing3.0 - 3.6 m 折叠双翼Heavy DutyWide swath pasture and crop residue shredding.
Rotary TillerSeedbed Prep
90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机Commercial / Field ScaleDeep intensive seedbed preparation for commercial row crops.
Disc HarrowSecondary Tillage
10 to 14 ft Tandem / Offset3.0 - 4.2 m 重型交错耙Heavy DutyAggressive residue cutting in corn/cotton stubble.
Hay BalerHay & Forage
5x6 Round Baler or 3x3 Mid Square1.5x1.8 m 大圆捆或中型方捆机Heavy DutyHigh density baling; requires minimum 85 PTO HP.
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for John Deere 6403.

Estimated Continuous Field Runtime: 7.9 hrs

Approximately 7.9 hours of continuous field operation at ~75% rated power on a full tank (41.7 gal / 157.9 L).

Estimated 75% Load Fuel Burn~5.3 gal/hr (20.1 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours

John Deere 6403 Specification Unit Converter

Convert power, fluid capacities, and operating weights between metric and imperial standards for John Deere 6403.

Converted Equivalents:

Horsepower (HP)102 hp
Kilowatts (kW)76.1 kW
Metric Horsepower (PS / CV)103.4 PS

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