| Manufacturer | Challenger |
| Price | - |
| Model | MT445B |
| Equipment Type | Utility Tractors |
| Factory | Beauvais, France |
OCED TRACTOR TEST 2291 2
| Description | Diesel 16-speed 4WD September 2004 - 2004, Link: OCED Tractor Test 2291 file PTO performance Drawbar performance Gear 1LC used for power test. Gear 2TC used for pull test |
| Max power | 60.5hp / 45.1kW |
| Fuel use | 4.9gal/hour / 18.5l/hour |
| Power at rated engine speed | 70.7hp / 52.7kW |
| Power at rated PTO speed | 73.4hp / 54.7kW |
| Max pull | 8680lbs / 3937kg |
CHALLENGER MT445B POWER
| Engine | 85hp / 63.4kW |
| PTO (claimed) | 70hp / 52.2kW |
| Drawbar (tested) | 60.5hp / 45.1kW |
| PTO (tested) | 75.9hp / 56.6kW |
ENGINE DETAIL
The Challenger MT445B features a robust 4.4L Caterpillar 3054T turbocharged diesel engine, delivering 85 hp at a rated RPM of 2200, which provides adequate power for medium-duty applications. Its dual paper element air cleaner system enhances engine longevity by ensuring optimal air intake, while the 17.5:1 compression ratio improves efficiency at the Tier 2 emissions level. A potential challenge is maintaining compliance with evolving emissions regulations, as its Tier 2 rating may limit usage in regions with stricter standards.
| Description | Caterpillar 3054T turbocharged diesel 4-cylinder liquid-cooled vertical This engine was alternative branded as a Perkins 1104C depending on market |
| Displacement | 268ci / 4.4L |
| Bore/Stroke | 4.134x5.00inches / 105x 127 mm |
| Emissions | Tier 2 |
| Power | 85hp / 63.4kW |
| Air cleaner | dual paper elements |
| Compression | 17.5:1 |
| Rated RPM | 2200 |
| Starter volts | 12 |
CHALLENGER MT445B ENGINE
The Challenger MT445B features a robust Caterpillar 4.4L 4-cylinder diesel engine, optimized for durability and fuel efficiency, making it suitable for a variety of agricultural applications. With a 40-gallon (151.4L) fuel tank, it provides extended operational range, which is advantageous for long fieldwork sessions without frequent refueling. However, the tractor's performance may be challenged in extremely cold conditions, where diesel engines typically require additional management for optimal start-up.
| Description | Caterpillar 4.4L 4-cyl diesel |
| Fuel tank | 40gal / 151.4L |
TRANSMISSION
The Challenger MT445B features the Autopower IV transmission with a four-speed power shift system, enabling efficient power delivery through 16 forward and reverse gears. Its wet disc clutch design minimizes wear and provides smoother engagement during operation, enhancing the overall lifespan of the transmission. Ideal for varied agricultural tasks, this setup offers operators the flexibility to adapt to different field conditions while maintaining optimal performance.
| Transmission | Autopower IV |
| Type | four speed power shift |
| Gears | 16 forward and reverse |
| Clutch | wet disc |
| Description | Four power shift gears in four ranges. |
MECHANICAL
The Challenger MT445B features a versatile 4WD configuration, enhancing traction on varied terrains while the inboard planetary final drives offer durability and a compact design. The electro-hydraulic differential lock allows for better power distribution during adverse conditions, but the 16-speed powershift transmission may require skilled operation to maximize efficiency. For operator comfort, the optional ROPS-certified cab with air-conditioning can help maintain productivity in extreme weather situations.
| Chassis | 4x2 2WD/4x4 MFWD 4WD |
| Final drives | inboard planetary |
| Differential lock | electro-hydraulic |
| Steering | hydrostatic power |
| Brakes | hydraulic wet disc |
| Cab | ROPS. Cab optional with air-conditioning. |
| Transmission | 16-speed four speed power shift |
HYDRAULICS
| ROPS Type | open center |
| Cab Type | closed center load sensing |
| Pressure | 2900psi / 200.0bar |
| Valves | 2 to 4 |
| Pump flow | 26.4gpm / 99.9lpm (open center)/29gpm / 109.8lpm (CCLS) |
TRACTOR HITCH
| Rear Type | II |
| Control | electronic top-link draft control |
| Rear lift (at 24 | 7285lbs / 3304kg |
| Rear Arms | telescopic stabilizers and link ends |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | electro-hydraulic wet disc |
| Rear RPM | 540/1000/540/540E / 1000/1000E |
CHALLENGER MT445B TIRES
The Challenger MT445B features a versatile
| Ag front | 10.00-16 (2WD)/13.6R28 (4WD) |
| Ag rear | 480/70R38 |
DIMENSIONS
| Wheelbase | 97inches / 246cm |
| Weight | 8,840lbs / 4009kg (2WD)/9,445lbs / 4284kg (4WD) |
| Rear axle | Flange |
DIMENSIONS & TIRES
The Challenger MT445B tractor features a relatively short wheelbase of 97 inches, enhancing maneuverability in confined spaces but potentially compromising stability on steep terrain. Weighing between 8,840 to 9,445 pounds, its robust construction provides substantial traction for heavy-duty tasks, although this may limit its transportability. The tire specifications, with front tires at 10.00-16 and rear tires at 480/70R38, suggest a balanced design ideal for diverse agricultural applications, enabling effective load handling and surface grip in various soil conditions.
| Wheelbase | 97inches / 246cm |
| Weight | 8840 to 9445 pounds |
| Front tire | 10.00-16 |
| Rear tire | 480/70R38 |
ELECTRICAL
| Ground | negative |
| Battery volts | 12 |