Challenger MT645D VS Allis Chalmers HD21 specs comparison
Challenger MT645D
General Infos| Make | Challenger |
| Model | MT645D |
| Country | United states |
| Production | From 2011 Until 2013 |
| Price | - |
| Tractor type | Row Crop tractor |
| Fuel | diesel |
| Service repair manual | Challenger MT645D Manual |
Dimensions, sizes and tires
| AG front tires | 480/70R34 |
| AG rear tires | 520/85R46 |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 24250 lbs or 10999 kg |
| Length | 215.7 inches [547 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 | 513.8 ci or 8.4 L |
| Cylinders | 6 cylinders |
| Engine power | 240 hp or 179.0 kW |
| Engine RPM | 2100 (rpm) |
| Torque | - | Torque RPM | - |
| Fuel type | diesel |
| Fuel injection | electronic high-pressure common rail |
| Fuel tank size | 167 gal or 632.1 L |
| Oil capacity | - |
| Oil change | - |
| Starter motor | electric |
| Starter volts | 12 V |
| Parts And Accessories | Challenger MT645D Parts |
| Batteries number | 2 |
| Batteries voltage | 12 V |
| Battries Amps | - |
| Cold Amps | - |
| Ground force | negative |
| Charging system | alternator |
| Charging Volts | - |
| Charging Amps | 240 amps |
| Trans system | Techstar CVT |
| Trans type | continuously variable transmission |
| Trans gears | infinite forward and reverse |
| Clutch system | - |
| Wheel drive | 4x4 MFWD 4WD |
| Final drive | inboard planetary |
| Steering | hydrostatic power |
| Braking system | hydraulic wet disc |
| Cabin type | Cab standard with air-conditioning and OptiRide Plus hydraulic suspension AGCO System 150 (optional) |
| Differentiel lock | electro-hydraulic |
| System | closed center load sensing |
| Valves | 4 to 6 |
| Pump flow | - |
| SVC flow | 26.4 gpm or 99.9 lpm |
| Steering flow | - |
| Tank capacity | 29.1 gal or 110.1 L |
| Hydraulic pressure | 2900 psi or 200.0 bar |
| Max flow | 46 gpm or 174.1 lpm |
| Drawbar type | Cat |
| Claimed power | - |
| Drawbar horsepower | 170.7 hp or 127.3 kW |
| Fuel consumption | 11.5 gal/hour or 43.5 l/hour |
| Pulling power | 25705 lbs or 11659 kg |
| Claimed power | 205 hp or 152.9 kW |
| Real power | 250.0 hp or 186.4 kW |
| Engine @RPM | 540E@1577 (rpm) |
| PTO Clutch | electro-hydraulic |
| Rear PTO | independent |
| Rear PTO RPM | 1000 (rpm) |
| Front PTO | - |
| Front PTO RPM | - |
| Mid PTO | - |
| Mid PTO RPM | - |
| Fuel consumption | 13.4 gal/hour or 50.7 l/hour |
| Hitch system | - |
| Rear hitch | III |
| Rear hitch lift | 22760 lbs or 10323 kg |
| Front hitch | III |
| Front hitch lift | 11000 lbs or 4989 kg |
Allis Chalmers HD21
General Infos| Make | Allis Chalmers |
| Model | HD21 |
| Country | United states |
| Production | From 1954 Until 1965 |
| Price | - |
| Tractor type | Agricultural Crawler tractor |
| Fuel | diesel |
| Service repair manual | Allis Chalmers HD21 Manual |
Dimensions, sizes and tires
| AG front tires | tracks |
| AG rear tires | tracks |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 45500 lbs or 20638 kg |
| Length | 198 inches [502 cm] |
| Width | - |
| Height | 99 inches [251 cm] |
| Wheelbase | - |
| Ground clearance | - |
| Turning radius | - |
| Rear tread size | - |
| Front tread size | - |
| Turning radius | - |
Horsepower and engin specs
| Engine capacity | 844 ci or 13.8 L |
| Cylinders | 6 cylinders |
| Engine power | 225 hp or 167.8 kW |
| Engine RPM | 1800 (rpm) |
| Torque | - | Torque RPM | - |
| Fuel type | diesel |
| Fuel injection | - |
| Fuel tank size | 135 gal or 511.0 L |
| Oil capacity | - |
| Oil change | - |
| Starter motor | - |
| Starter volts | 24 V |
| Parts And Accessories | Allis Chalmers HD21 Parts |
| Batteries number | 2 |
| Batteries voltage | 12 V |
| Battries Amps | - |
| Cold Amps | - |
| Ground force | - |
| Charging system | - |
| Charging Volts | - |
| Charging Amps | - |
| Trans system | - |
| Trans type | torque converter |
| Trans gears | 2 forward and 1 reverse |
| Clutch system | - |
| Wheel drive | crawler |
| Final drive | - |
| Steering | - |
| Braking system | contracting band |
| 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 | 135.12 hp or 100.8 kW |
| Fuel consumption | - |
| Pulling power | 40563 lbs or 18399 kg |
| Claimed power | - |
| Real power | - |
| Engine @RPM | - |
| PTO Clutch | - |
| Rear PTO | - |
| Rear PTO 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 | - |
Related tractor comparison
Challenger MT645D Allis Chalmers HD6
Allis Chalmers HD21 International Harvester B-250
Allis Chalmers HD21 McCormick-Deering Super W-6
Allis Chalmers HD21 ATC Terratrac 500
Challenger MT645D Wagner TR-14
Allis Chalmers HD21 Chamberlain Super 70
Choose another tractor
Useful links and guides ....
- Challenger provided us with the latest version of its MT645D service repair manual
- Find All mechanical and electrical parts and accessories of Challenger MT645D farm-tractor here
- Get your Allis Chalmers HD21 manual book version
- Cabine, electrical And mechanical parts for Allis Chalmers HD21 farm-tractor here
