| Manufacturer | Challenger |
| Price | - |
| Model | MT851 |
| Equipment Type | Agricultural Crawler Tractors |
| Factory |
CHALLENGER MT851 POWER
| Engine (gross) | 504.2hp / 376.0kW |
ENGINE DETAIL
The Challenger MT851 features a robust MAN D3876 turbocharged diesel engine with high displacement and impressive rated power of 504.2 hp, suited for heavy-duty applications in agriculture or construction. Its torque peak at 1450 RPM (1844 lb-ft) allows for excellent pulling capacity, particularly for tractor implements requiring substantial torque for efficient operation. Regular oil changes at 500 hours are essential to maintain engine longevity and performance, ensuring reliability in demanding environments.
| Description | MAN D3876 turbocharged diesel 6-cylinder liquid-cooled inline |
| Displacement | 933.7ci / 15.3L |
| Bore/Stroke | 5.43x6.69inches / 138x 170 mm |
| Rated Power (ECE R120) | 504.2hp / 376.0kW |
| Rated RPM | 1730 |
| Torque | 1844 lb-ft /2500.5 Nm |
| Torque RPM | 1450 |
| Starter | electric |
| Starter volts | 24 |
| Oil change | 500 h |
CHALLENGER MT851 ENGINE
The Challenger MT851 features a robust MAN 15.3L 6-cylinder diesel engine, ensuring high torque output for optimal performance in demanding agricultural tasks. With a substantial 350-gallon fuel tank and a 35.7-gallon DEF capacity, it offers extended operational range, reducing downtime for refueling and DEF replenishment. However, the weight of the fuel can impact maneuverability in softer soil conditions, making it crucial to consider field conditions when choosing usage scenarios.
| Description | MAN 15.3L 6-cyl diesel |
| Fuel tank | 350gal / 1324.8L |
| Exhaust fluid (DEF) | 35.7gal / 135.1L |
TRANSMISSION
The Challenger MT851 features an Accu-VT continuously-variable transmission (CVT), allowing for smooth transitions between speeds without shifting, enhancing operational efficiency. This infinite forward and reverse gear capability maximizes maneuverability in tight spaces, making it ideal for diverse agricultural applications. However, the complexity of CVTs may lead to increased repair costs and require specialized knowledge for maintenance.
| Transmission | Accu-VT |
| Type | continuously-variable transmission |
| Gears | infinite forward and reverse |
MECHANICAL
The Challenger MT851 features a crawler chassis, providing superior traction and stability on uneven terrain, making it ideal for agricultural applications that require heavy-load performance. Its continuously-variable transmission (CVT) allows for seamless power delivery and optimal fuel efficiency, enhancing operational productivity. The standard cab with air-conditioning ensures operator comfort during long working hours, but may require regular maintenance to uphold climate control efficacy.
| Chassis | crawler |
| Cab | Cab standard with air-conditioning. |
| Transmission | continuously-variable transmission |
HYDRAULICS
| Type | closed center pressure-flow compensated |
| Pressure | 2900psi / 200.0bar |
| Rear valves | 4 to 8 |
| Pump flow | 58.1gpm / 219.9lpm/116.2gpm / 439.8lpm |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 1000 / 1000E |
DIMENSIONS
| Wheelbase | 118inches / 299cm |
| Length | 266inches / 675cm |
| Width | 116.1inches / 294cm *Minimum width |
| Height | 148inches / 375cm |
| Weight | 42000lbs / 19051kg |
| Max weight | 59000lbs / 26762kg |
| Ground clearance | 14.1inches / 35cm |
| Gauge | 88 to 128inches / 223to 325 cm |
DIMENSIONS & TRACKS
| Wheelbase | 118inches / 299cm |
| Weight | 42000lbs / 19051kg |
| Description | tracks |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 325 |
| Batteries | 3 |
| Battery volts | 12 |