Challenger
Challenger MT645B
The Challenger MT645B is a row-crop tractor produced from 2005 to 2008 as part of the MT600B Series by Challenger, a part of AGCO. It features a 235 hp Sisu 7.4L 6-cylinder turbocharged diesel engine, a TechStar continuously variable transmission (CVT), and four-wheel drive with electrohydraulic differential locks. The tractor is built in Beauvais, France, and offers advanced hydraulics, a variety of PTO options, and a comfortable cab with optional pneumatic suspension and climate control. It is designed for heavy-duty agricultural tasks with a robust hitch system and substantial lifting capacities.
Power235 hp
Founded2005 - 2008
ModelMT645B
Technical Specifications
Detailed specifications and technical data for Challenger MT645B
Power
| Engine | 235 hp (175.2 kW) |
|---|---|
| PTO (tested) | 222.9 hp (166.2 kW) |
| PTO (claimed) | 200 hp (149.1 kW) |
| Drawbar (tested) | 172.30 hp (128.5 kW) |
Engine
| Type | turbocharged diesel |
|---|---|
| Model | Sisu 74ETA |
| Power | 235 hp (175.2 kW) |
| Cooling | liquid-cooled vertical inline |
| Cylinders | 6-cylinder 24-valve |
| Rated RPM | 2200 |
| Air cleaner | dual paper elements |
| Bore/Stroke | 4.251x5.278 inches (108 x 134 mm) |
| Compression | 17.5:1 |
| Pre-heating | 1000W coolant heater (Optional) |
| Displacement | 449 ci (7.4 L) |
| Oil capacity | 20 qts (18.9 L) |
| Starter volts | 12 |
| Coolant capacity | 35.6 qts (33.7 L) |
Weight
| Shipping | 18,308 lbs (8304 kg) |
|---|---|
| Operating | 19,595 lbs (8888 kg) |
| Max Drawbar | 5620 lbs (2549 kg) |
| Max rear axle | 17044 lbs (7731 kg) |
| Max front axle | 10861 lbs (4926 kg) |
Capacity
| Fuel | 159 gal (601.8 L) |
|---|---|
| Hydraulic system | 26.4 gal (99.9 L) |
Electrical
| Ground | negative |
|---|---|
| Batteries | 2 |
| Battery CCA | 775 |
| Battery volts | 12 |
| Charging amps | 150 |
| Charging system | alternator |
Hydraulics
| Type | pressure flow compensated (PFC) |
|---|---|
| Valves | 4 to 6 |
| Capacity | 26.4 gal (99.9 L) |
| Pressure | 2900 psi (200.0 bar) |
| Total flow | 39 gpm (147.6 lpm) |
Mechanical
| Cab | standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control. |
|---|---|
| Drive | Four-wheel drive |
| Brakes | Hydraulic wet disc brakes |
| Final drives | inboard planetary |
| Power steering | Yes |
| Trailer brakes | hydraulic (Optional) |
| Differential lock | electrohydraulic front and rear |
Production
| Type | Row-Crop tractor |
|---|---|
| Series | MT600B Series |
| Built in | Beauvais, France |
| Years produced | 2005 - 2008 |
Transmission
| Type | continuously variable transmission (CVT) |
|---|---|
| Gears | infinite forward and reverse (2-range) |
| Model | TechStar |
| Oil capacity | 70.8 qts (67.0 L) |
Tractor hitch
| Rear Type | III |
|---|---|
| Front lift | 7,700 lbs (3492 kg) |
| Front Hitch | II (Optional) |
| Optional front lift | 12,100 lbs (5488 kg) |
| Rear lift (at 24"/610mm) | 15,600 lbs (7076 kg) |
Dimensions & Tires
| Width | 118 inches (299 cm) |
|---|---|
| Length | 206 inches (523 cm) |
| Rear tire | 480/80R46 |
| Wheelbase | 121.1 inches (307 cm) |
| Front tire | 380/85R34 |
| Rear tread | 60 to 88 inches (152 to 223 cm) |
| Height (cab) | 123.6 inches (313 cm) |
| Bar rear axle | 4.33 by 118 inches (109 by 2997 mm) |
| Ground clearance | 22.4 inches (56 cm) |
Power Take-off (PTO)
| Clutch | electro-hydraulic wet disc |
|---|---|
| Rear PTO | independent |
| Engine RPM | 540@2037, 540E@1598, 1000@2031 |
| Rear PTO Type | 540 (1.375) |
| Optional Rear PTO Type | 540/540E |
| Additional Rear PTO Types | 1000 (1.375), 1000 (1.75) |