John Deere 8430 VS David Brown 990 Implematic specs comparison
                                         
                                        
                                    
                                
                                                                            
                                        
                                    
                                                                            
                                    
                                                                                        John Deere 8430
General Infos| Make | John Deere | 
| Model | 8430 | 
| Country | United states | 
| Production | From 2006 Until 2009 | 
| Price | - | 
| Tractor type | Row Crop tractor | 
| Fuel | diesel | 
| Service repair manual | John Deere 8430 Manual | 
Dimensions, sizes and tires
| AG front tires | - | 
| AG rear tires | - | 
| Lawn front tires | - | 
| Lawn rear tires | - | 
| Indus front tires | - | 
| Indus rear tires | - | 
| Weight | 24,825 lbs or 11260 kg | 
| Length | 219.1 inches [556 cm] | 
| Width | - | 
| Height | 122.9 inches [312 cm] | 
| Wheelbase | 118.9 inches [302 cm] (ILS) | 
| Ground clearance | 17.4 inches [44 cm] | 
| Turning radius | - | 
| Rear tread size | - | 
| Front tread size | - | 
| Turning radius | - | 
Horsepower and engin specs
| Engine capacity | 548 ci or 9.0 L | 
| Cylinders | 6 cylinders 24 valves | 
| Engine power | 330 hp or 246.1 kW | 
| Engine RPM | 2100 (rpm) | 
| Torque | - | Torque RPM | - | 
| Fuel type | diesel | 
| Fuel injection | - | 
| Fuel tank size | 180 gal or 681.3 L | 
| Oil capacity | 25.5 qts or 24.1 L | 
| Oil change | - | 
| Starter motor | - | 
| Starter volts | 12 V | 
| Parts And Accessories | John Deere 8430 Parts | 
| Batteries number | 2 | 
| Batteries voltage | 12 V | 
| Battries Amps | - | 
| Cold Amps | 925 | 
| Ground force | negative | 
| Charging system | alternator | 
| Charging Volts | - | 
| Charging Amps | 200 amps | 
| Trans system | John Deere Infinitely Variable Transmission (IVT) | 
| Trans type | full power shift | 
| Trans gears | infinite forward and reverse | 
| Clutch system | hydraulic wet disc | 
| Wheel drive | 4x4 Independent Link Suspension | 
| Final drive | - | 
| Steering | power | 
| Braking system | wet disc | 
| Cabin type | CommandView cab standard | 
| Differentiel lock | - | 
| System | closed center PFC | 
| Valves | 3 to 5 | 
| Pump flow | 31.7 gpm or 120.0 lpm | 
| SVC flow | - | 
| Steering flow | - | 
| Tank capacity | 9.5 gal or 36.0 L | 
| Hydraulic pressure | - | 
| Max flow | 44 gpm or 166.5 lpm | 
| Drawbar type | - | 
| Claimed power | - | 
| Drawbar horsepower | 211.26 hp or 157.5 kW | 
| Fuel consumption | 13.6 gal/hour or 51.5 l/hour | 
| Pulling power | 34,671 lbs or 15726 kg | 
| Claimed power | 250 hp or 186.4 kW | 
| Real power | 272.59 hp or 203.3 kW | 
| Engine @RPM | 540@1817 (rpm) | 
| PTO Clutch | - | 
| Rear PTO | independent | 
| Rear PTO RPM | 1000 (rpm) | 
| Front PTO | - | 
| Front PTO RPM | - | 
| Mid PTO | - | 
| Mid PTO RPM | - | 
| Fuel consumption | 14.8 gal/hour or 56.0 l/hour | 
| Hitch system | - | 
| Rear hitch | III | 
| Rear hitch lift | 17,300 lbs or 7847 kg | 
| Front hitch | - | 
| Front hitch lift | - | 
                                        
                                    
                                                                            
                                        
                                    
                                                                            
                                    
                                                                                        David Brown 990 Implematic
General Infos| Make | David Brown | 
| Model | 990 Implematic | 
| Country | United states | 
| Production | From 1961 Until 1980 | 
| Price | - | 
| Tractor type | Utility tractor | 
| Fuel | diesel | 
| Service repair manual | David Brown 990 Implematic Manual | 
Dimensions, sizes and tires
| AG front tires | 6.00-16 | 
| AG rear tires | 11-32 | 
| Lawn front tires | - | 
| Lawn rear tires | - | 
| Indus front tires | - | 
| Indus rear tires | - | 
| Weight | 4272 lbs or 1937 kg | 
| Length | 118 inches [299 cm] | 
| Width | 67 inches [170 cm] | 
| Height | - | 
| Wheelbase | 76.75 inches [194 cm] | 
| Ground clearance | - | 
| Turning radius | - | 
| Rear tread size | 52/56/60/64/68/72/76 inches | 
| Front tread size | 52/56/60/64/68/72/76 inches | 
| Turning radius | - | 
Horsepower and engin specs
| Engine capacity | 185.8 ci or 3.0 L | 
| Cylinders | 4 cylinders | 
| Engine power | 52 hp or 38.8 kW | 
| Engine RPM | 2200 (rpm) | 
| Torque | - | Torque RPM | - | 
| Fuel type | diesel | 
| Fuel injection | - | 
| Fuel tank size | 13.74 gal or 52.0 L | 
| Oil capacity | 7.8 qts or 7.4 L | 
| Oil change | - | 
| Starter motor | - | 
| Starter volts | 12 V | 
| Parts And Accessories | David Brown 990 Implematic Parts | 
| Batteries number | 2 | 
| Batteries voltage | 6 V | 
| Battries Amps | - | 
| Cold Amps | - | 
| Ground force | - | 
| Charging system | generator | 
| Charging Volts | - | 
| Charging Amps | - | 
| Trans system | - | 
| Trans type | partially synchronized | 
| Trans gears | 12 forward and 4 reverse | 
| Clutch system | 279mm dry disc | 
| Wheel drive | 4x2 2WD | 
| Final drive | - | 
| Steering | manual | 
| Braking system | differential mechanical expanding shoe | 
| Cabin type | Open operator station | 
| Differentiel lock | mechanical rear | 
| System | open center | 
| Valves | - | 
| Pump flow | - | 
| SVC flow | - | 
| Steering flow | - | 
| Tank capacity | - | 
| Hydraulic pressure | 2000 psi or 137.9 bar | 
| Max flow | 7.4 gpm or 28.0 lpm | 
| Drawbar type | - | 
| Claimed power | 43 hp or 32.1 kW | 
| Drawbar horsepower | 43.47 hp or 32.4 kW | 
| Fuel consumption | 3.4 gal/hour or 12.9 l/hour | 
| Pulling power | 6,039 lbs or 2739 kg | 
| Claimed power | 48 hp or 35.8 kW | 
| Real power | 48.49 hp or 36.2 kW | 
| Engine @RPM | 540@1800 (rpm) | 
| PTO Clutch | dry disc | 
| Rear PTO | transmission | 
| Rear PTO RPM | 540 (rpm) | 
| Front PTO | - | 
| Front PTO RPM | - | 
| Mid PTO | - | 
| Mid PTO RPM | - | 
| Fuel consumption | 3.0 gal/hour or 11.4 l/hour | 
| Hitch system | - | 
| Rear hitch | II/I | 
| Rear hitch lift | - | 
| Front hitch | - | 
| Front hitch lift | - | 
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Useful links and guides ....
- John Deere provided us with the latest version of its 8430 service repair manual
 - Find All mechanical and electrical parts and accessories of John Deere 8430 farm-tractor here
 
- Get your David Brown 990 Implematic manual book version
 - Cabine, electrical And mechanical parts for David Brown 990 Implematic farm-tractor here