Sheppard Diesel SD-3 VS Challenger MT645E specs comparison
                                         
                                        
                                    
                                
                                                                            
                                        
                                    
                                                                            
                                    
                                                                                        Sheppard Diesel SD-3
General Infos| Make | Sheppard Diesel | 
| Model | SD-3 | 
| Country | United states | 
| Production | From 1949 Until 1956 | 
| Price | - | 
| Tractor type | Row Crop tractor | 
| Fuel | diesel | 
| Service repair manual | Sheppard Diesel SD-3 Manual | 
Dimensions, sizes and tires
| AG front tires | 6.00-16 | 
| AG rear tires | 11x38 | 
| Lawn front tires | - | 
| Lawn rear tires | - | 
| Indus front tires | - | 
| Indus rear tires | - | 
| Weight | 4196 lbs or 1903 kg | 
| Length | 131 inches [332 cm] | 
| Width | - | 
| Height | 70.25 inches [178 cm] | 
| Wheelbase | 92 inches [233 cm] | 
| Ground clearance | - | 
| Turning radius | - | 
| Rear tread size | 54 to 82 inches | 
| Front tread size | 56 to 80 inches | 
| Turning radius | - | 
Horsepower and engin specs
| Engine capacity | 212.8 ci or 3.5 L | 
| Cylinders | 3 cylinders | 
| Engine power | 32 hp or 23.9 kW | 
| Engine RPM | 1650 (rpm) | 
| Torque | - | Torque RPM | - | 
| Fuel type | diesel | 
| Fuel injection | indirect injection | 
| Fuel tank size | - | 
| Oil capacity | - | 
| Oil change | - | 
| Starter motor | - | 
| Starter volts | - | 
| Parts And Accessories | Sheppard Diesel SD-3 Parts | 
| Batteries number | - | 
| Batteries voltage | - | 
| Battries Amps | - | 
| Cold Amps | - | 
| Ground force | - | 
| Charging system | - | 
| Charging Volts | - | 
| Charging Amps | - | 
| Trans system | - | 
| Trans type | gear | 
| Trans gears | 8 forward and 2 reverse | 
| Clutch system | dry disc | 
| Wheel drive | 4x2 2WD | 
| Final drive | spur gear | 
| Steering | manual | 
| Braking system | mechanical drum | 
| Cabin type | Open operator station | 
| Differentiel lock | - | 
| System | - | 
| Valves | - | 
| Pump flow | - | 
| SVC flow | - | 
| Steering flow | - | 
| Tank capacity | - | 
| Hydraulic pressure | - | 
| Max flow | - | 
| Drawbar type | - | 
| Claimed power | - | 
| Drawbar horsepower | - | 
| Fuel consumption | - | 
| Pulling power | - | 
| Claimed power | - | 
| Real power | - | 
| Engine @RPM | - | 
| PTO Clutch | - | 
| Rear PTO | - | 
| Rear PTO RPM | 540 (rpm) | 
| Front PTO | - | 
| Front PTO RPM | - | 
| Mid PTO | - | 
| Mid PTO RPM | - | 
| Fuel consumption | - | 
| Hitch system | - | 
| Rear hitch | - | 
| Rear hitch lift | - | 
| Front hitch | - | 
| Front hitch lift | - | 
                                        
                                    
                                                                            
                                        
                                    
                                                                            
                                    
                                                                                        Challenger MT645E
General Infos| Make | Challenger | 
| Model | MT645E | 
| Country | United states | 
| Production | From 2014 | 
| Price | - | 
| Tractor type | Row Crop tractor | 
| Fuel | diesel | 
| Service repair manual | Challenger MT645E Manual | 
Dimensions, sizes and tires
| AG front tires | - | 
| AG rear tires | - | 
| Lawn front tires | - | 
| Lawn rear tires | - | 
| Indus front tires | - | 
| Indus rear tires | - | 
| Weight | 23810 lbs or 10800 kg | 
| Length | 218.6 inches [555 cm] | 
| Width | - | 
| Height | 141 inches [358 cm] | 
| Wheelbase | 122 inches [309 cm] | 
| Ground clearance | - | 
| Turning radius | - | 
| Rear tread size | - | 
| Front tread size | - | 
| Turning radius | - | 
Horsepower and engin specs
| Engine capacity | 512.6 ci or 8.4 L | 
| Cylinders | 6 cylinders 24 valves | 
| Engine power | 240 hp or 179.0 kW | 
| Engine RPM | 2100 (rpm) | 
| Torque | - | Torque RPM | - | 
| Fuel type | diesel | 
| Fuel injection | - | 
| Fuel tank size | 166 gal or 628.3 L | 
| Oil capacity | - | 
| Oil change | - | 
| Starter motor | electric | 
| Starter volts | 12 V | 
| Parts And Accessories | Challenger MT645E Parts | 
| Batteries number | - | 
| Batteries voltage | 12 V | 
| Battries Amps | - | 
| Cold Amps | - | 
| Ground force | negative | 
| Charging system | alternator | 
| Charging Volts | 12 V | 
| Charging Amps | 240 amps | 
| Trans system | Techstar CVT | 
| Trans type | continuously variable transmission (CVT) | 
| Trans gears | infinite (2-range) forward and reverse | 
| Clutch system | - | 
| Wheel drive | 4x4 MFWD 4WD | 
| Final drive | - | 
| Steering | hydrostatic power | 
| Braking system | hydraulic wet disc | 
| Cabin type | Cab standard with air-conditioning | 
| Differentiel lock | electro-hydraulic | 
| System | closed center load sensing | 
| Valves | 4 to 6 | 
| Pump flow | 54 gpm or 204.4 lpm | 
| SVC flow | - | 
| Steering flow | - | 
| Tank capacity | - | 
| Hydraulic pressure | 2900 psi or 200.0 bar | 
| Max flow | - | 
| Drawbar type | Cat | 
| Claimed power | - | 
| Drawbar horsepower | - | 
| Fuel consumption | - | 
| Pulling power | - | 
| Claimed power | 205 hp or 152.9 kW | 
| Real power | - | 
| Engine @RPM | - | 
| PTO Clutch | - | 
| Rear PTO | independent | 
| Rear PTO RPM | 1000 (rpm) | 
| Front PTO | - | 
| Front PTO RPM | - | 
| Mid PTO | - | 
| Mid PTO RPM | - | 
| Fuel consumption | - | 
| Hitch system | - | 
| Rear hitch | III/IVN | 
| Rear hitch lift | 26455 lbs or 11999 kg | 
| Front hitch | - | 
| Front hitch lift | - | 
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Useful links and guides ....
- Sheppard Diesel provided us with the latest version of its SD-3 service repair manual
 - Find All mechanical and electrical parts and accessories of Sheppard Diesel SD-3 farm-tractor here
 
- Get your Challenger MT645E manual book version
 - Cabine, electrical And mechanical parts for Challenger MT645E farm-tractor here