The John Deere 6403 is a 2WD/4WD utility tractor from the 6003 series. This tractor was manufactured by John Deere in Saltillo, Mexico from 2002 to 2008. The John Deere 6403 is equipped with a 4.5 L (276.0 cu·in) four-cylinder diesel engine and a partially synchronized transmission with 9 forward and 3 reverse gears.
The JD 6403 utility tractor used the John Deere engine. It is a 4.5 L, 4,523 cm2, (276.0 cu·in) four-cylinder turbocharged diesel engine with 106.0 mm (4.17 in) of the cylinder bore and 127.0 mm (5 in) of the piston stroke. The compression ratio rating is 17.0:1. This engine produced 103.5 PS (76.1 kW; 102.1 HP) at 2,100 rpm of output power.
The John Deere 6403 is equipped with power steering, mechanical wet disc brakes, Two-post folding ROPS or ComfortVantage Cab (optional) and 157.8 liters (41.7 US gal.; 34.7 Imp. gal) fuel tank.
John Deere 6403 Specifications
| General Specifications | |
| Model | John Deere 6403 |
| Length | 2WD: 4,120 mm (162.2 in) 4WD: 4,140 mm (163 in) |
| Width | 1,850 mm (72.8 in) |
| Height (ROPS) | 2,760 mm (108.7 in) |
| Wheel base | 2WD: 2,310 mm (90.9 in) 4WD: 2,300 mm (90.6 in) |
| Weight (shipping) | 2WD ROPS: 3,490 kg (7,695 lbs) 4WD ROPS: 3,690 kg (8,130 lbs) 2WD Cab: 3,890 kg (8,580 lbs) 4WD Cab: 4,080 kg (8,990 lbs) |
| Fuel tank capacity | 157.8 liters (41.7 US gal.; 34.7 Imp. gal) |
| Battery | 12V, CCA 925A |
| Cabin type | Two-post folding ROPS or ComfortVantage Cab (optional) |
| Engine | |
| Engine model | John Deere |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 4 |
| Fuel type | Diesel |
| Displacement | 4.5 L, 4,523 cm2, (276.0 cu·in) |
| Bore and stroke | 106.0 mm X 127.0 mm (4.17 in X 5 in) |
| Compression ratio | 17.0:1 |
| Horsepower | 103.5 PS (76.1 kW; 102.1 HP) at 2,100 rpm |
| Starter | Electric |
| Oil capacity: | 12.3 L (13 US. qt, 10.8 Imp. qt.) |
| Coolant capacity: | 13.5 L (14.3 US. qt, 11.9 Imp. qt.) |
| Transmission and chassis | |
| Chassis | 4×2 2WD or 4×4 MFWD 4WD |
| Steering type | Power |
| Brakes | Mechanical wet disc |
| Final drive | Inboard planetary |
| Differential lock | Mechanical rear |
| Transmission model | Top Shaft Synchronized (TSS) |
| Transmission type | Partially synchronized with cerametalic dry disc clutch |
| Gears | 9 forward and 3 reverse |
| Speed | Forward: 29.4 kmh (18.3 mph) Reverse: 27.8 kmh (17.3 mph) |
| Tires | |
| Front tires | Ag: 10.00-16, 13.6-24 |
| Rear tires | Ag: 18.4-34 |
| Three-Point Hitch | |
| Category | II |
| Control type | Mechanical lower-link draft sensing |
| Lift capacity (at 610 mm/24 in) | 2,190 kg (4,830 lbs) |
| PTO (Power take-off shaft) | |
| Rear PTO type | Independent with dry disc clutch |
| Rear PTO speed | 540/1000 rpm |
| Hydraulic system | |
| Hydraulic type | Open center |
| Pressure | 2750 psi (189.6 bar) |
| Valves | 2 or 3 |
| Pump flow | 12.1 gpm (45.8 lpm) |
| Total flow | 15.0 gpm (56.8 lpm) |
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