Challenger MT645B VS M-R-S A-80B specs comparison
Challenger MT645B
General Infos| Make | Challenger |
| Model | MT645B |
| Country | United states |
| Production | From 2005 Until 2008 |
| Price | - |
| Tractor type | Row Crop tractor |
| Fuel | diesel |
| Service repair manual | Challenger MT645B Manual |
Dimensions, sizes and tires
| AG front tires | 380/85R34 |
| AG rear tires | 480/80R46 |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 18,308 lbs or 8304 kg |
| Length | 206 inches [523 cm] |
| Width | 118 inches [299 cm] |
| Height | 123.6 inches [313 cm] |
| Wheelbase | 121.1 inches [307 cm] |
| Ground clearance | 22.4 inches [56 cm] |
| Turning radius | - |
| Rear tread size | 60 to 88 inches |
| Front tread size | - |
| Turning radius | - |
Horsepower and engin specs
| Engine capacity | 449 ci or 7.4 L |
| Cylinders | 6 cylinders 24 valves |
| Engine power | 235 hp or 175.2 kW |
| Engine RPM | 2200 (rpm) |
| Torque | - | Torque RPM | - |
| Fuel type | diesel |
| Fuel injection | - |
| Fuel tank size | 159 gal or 601.8 L |
| Oil capacity | 20 qts or 18.9 L |
| Oil change | - |
| Starter motor | - |
| Starter volts | 12 V |
| Parts And Accessories | Challenger MT645B Parts |
| Batteries number | 2 |
| Batteries voltage | 12 V |
| Battries Amps | - |
| Cold Amps | 775 |
| Ground force | negative |
| Charging system | alternator |
| Charging Volts | - |
| Charging Amps | 150 amps |
| Trans system | TechStar |
| Trans type | continuously variable transmission (CVT) |
| Trans gears | infinite (2-range) forward and reverse |
| Clutch system | - |
| Wheel drive | 4x4 MFWD 4WD |
| Final drive | inboard planetary |
| Steering | power |
| Braking system | hydraulic wet disc |
| Cabin type | Cab standard with heat and A/C |
| Differentiel lock | electrohydraulic front and rear |
| System | pressure flow compensated |
| Valves | 4 to 6 |
| Pump flow | - |
| SVC flow | - |
| Steering flow | - |
| Tank capacity | 26.4 gal or 99.9 L |
| Hydraulic pressure | 2900 psi or 200.0 bar |
| Max flow | 39 gpm or 147.6 lpm |
| Drawbar type | - |
| Claimed power | - |
| Drawbar horsepower | 172.30 hp or 128.5 kW |
| Fuel consumption | 12.0 gal/hour or 45.4 l/hour |
| Pulling power | 16,954 lbs or 7690 kg |
| Claimed power | 200 hp or 149.1 kW |
| Real power | 221.55 hp or 165.2 kW |
| Engine @RPM | 540@2037 (rpm) |
| PTO Clutch | electro-hydraulic wet disc |
| Rear PTO | independent |
| Rear PTO RPM | 540 (rpm) |
| Front PTO | - |
| Front PTO RPM | - |
| Mid PTO | - |
| Mid PTO RPM | - |
| Fuel consumption | 12.0 gal/hour or 45.4 l/hour |
| Hitch system | - |
| Rear hitch | III |
| Rear hitch lift | 15,600 lbs or 7076 kg |
| Front hitch | II |
| Front hitch lift | 7,700 lbs or 3492 kg |
M-R-S A-80B
General Infos| Make | M-R-S |
| Model | A-80B |
| Country | United states |
| Production | From 1967 Until 1980 |
| Price | - |
| Tractor type | Four wheel Drive (4WD) tractor |
| Fuel | diesel |
| Service repair manual | M-R-S A-80B Manual |
Dimensions, sizes and tires
| AG front tires | 18.00-26 |
| AG rear tires | 18.00-26 |
| Lawn front tires | - |
| Lawn rear tires | - |
| Indus front tires | - |
| Indus rear tires | - |
| Weight | 17000 lbs or 7711 kg |
| Length | 195 inches [495 cm] |
| Width | 111 inches [281 cm] |
| Height | 117 inches [297 cm] |
| Wheelbase | 118 inches [299 cm] |
| Ground clearance | 14 inches [35 cm] |
| Turning radius | - |
| Rear tread size | 80 inches |
| Front tread size | 80 inches |
| Turning radius | - |
Horsepower and engin specs
| Engine capacity | 283.7 ci or 4.6 L |
| Cylinders | 4 cylinders |
| Engine power | 141 hp or 105.1 kW |
| Engine RPM | 2100 (rpm) |
| Torque | 366 lb-ft or 496.3 Nm | Torque RPM | 1600 (rpm) |
| Fuel type | diesel |
| Fuel injection | - |
| Fuel tank size | - |
| Oil capacity | 15 qts or 14.2 L |
| Oil change | - |
| Starter motor | - |
| Starter volts | - |
| Parts And Accessories | M-R-S A-80B Parts |
| Batteries number | - |
| Batteries voltage | 12 V |
| Battries Amps | - |
| Cold Amps | - |
| Ground force | - |
| Charging system | - |
| Charging Volts | - |
| Charging Amps | - |
| Trans system | - |
| Trans type | - |
| Trans gears | 20 forward and 4 reverse |
| Clutch system | 381mm dry disc |
| Wheel drive | 4x4 4WD |
| Final drive | - |
| Steering | power four-wheel |
| Braking system | - |
| Cabin type | Open operator station |
| Differentiel lock | - |
| System | - |
| Valves | - |
| Pump flow | 20 gpm or 75.7 lpm |
| SVC flow | - |
| Steering flow | - |
| Tank capacity | - |
| Hydraulic pressure | - |
| Max flow | - |
| Drawbar type | - |
| Claimed power | 123 hp or 91.7 kW |
| Drawbar horsepower | - |
| Fuel consumption | - |
| Pulling power | - |
| 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
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Challenger MT645B Massey Ferguson 135
M-R-S A-80B Yanmar YM270
Challenger MT645B Yanmar YM273
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Choose another tractor
Useful links and guides ....
- Challenger provided us with the latest version of its MT645B service repair manual
- Find All mechanical and electrical parts and accessories of Challenger MT645B farm-tractor here
- Get your M-R-S A-80B manual book version
- Cabine, electrical And mechanical parts for M-R-S A-80B farm-tractor here
