| Manufacturer | Challenger |
| Price | - |
| Model | MT445 |
| Equipment Type | Utility Tractors |
| Factory | England |
OCED TRACTOR TEST 1950 2
| Description | Diesel 12-speed 4WD October 2000 - December 2000, Link: OCED Tractor Test 1950 file PTO performance Drawbar performance Gear 3M used for power test. Gear 2L used for pull test |
| Power at rated engine speed | 69.7hp / 52.0kW |
| Fuel use | 4.3gal/hour / 16.3l/hour |
| Power at rated PTO speed | 68hp / 50.7kW |
| Max power | 60.2hp / 44.9kW |
| Max pull | 6970lbs / 3161kg |
CHALLENGER MT445 POWER
| PTO (claimed) | 65hp / 48.5kW |
| Drawbar (tested) | 60.2hp / 44.9kW |
| PTO (tested) | 69.7hp / 52.0kW |
ENGINE DETAIL
The Challenger MT445 tractor utilizes a Perkins 3054B diesel engine with a displacement of 4.2L, providing a robust power-to-weight ratio suitable for various agricultural applications. The engine's dual paper element air cleaner enhances filtration efficiency, while the thermostart pre-heating system ensures reliable cold starts, particularly valuable in colder climates. With a 17.3:1 compression ratio, it offers good fuel efficiency and torque characteristics at a rated RPM of 2200, making it an advantageous choice for both heavy-duty tasks and fuel-conscious operations.
| Description | Perkins 3054B diesel 4-cylinder liquid-cooled |
| Displacement | 258ci / 4.2L |
| Bore/Stroke | 4.055x5.00inches / 103x 127 mm |
| Air cleaner | dual paper elements |
| Pre-heating | thermostart |
| Compression | 17.3:1 |
| Rated RPM | 2200 |
| Starter volts | 12 |
CHALLENGER MT445 ENGINE
The Challenger MT445, powered by a Perkins 4.2L 4-cylinder diesel engine, offers a substantial fuel capacity with the ROPS configuration holding 29.1 gallons (110.1L) and an optional cab setup providing up to 50 gallons (189.3L). This increased fuel capacity enhances operational efficiency in extended field work, reducing downtime for refueling. However, the weight distribution may be affected by the larger fuel tank in the cab configuration, which could influence stability and maneuverability in certain terrains.
| Description | Perkins 4.2L 4-cyl diesel |
| ROPS Fuel tank | 29.1gal / 110.1L |
| Cab Fuel tank | 34gal / 128.7L/50gal / 189.3L with cab. |
TRANSMISSIONS OVERVIEW
The Challenger MT445 features a 24-speed power shuttle that enhances ease of operation and efficiency during directional changes, ideal for time-sensitive tasks. Its 12-speed syncromesh allows smooth gear changes under load, while the 12-speed mechanical shuttle provides robust performance for heavy-duty applications. This combination offers versatility, but operators may face a learning curve in maximizing the transmission's capabilities effectively.
| Description | 24-speed power shuttle 12-speed syncromesh 12-speed mechanical shuttle |
TRANSMISSION 1
The Challenger MT445 features a power shuttle transmission with 24 forward and reverse gears, allowing for precise control and flexibility in various field applications. The wet disc clutch enhances durability and smoothness during engagements, particularly advantageous in heavy-duty tasks and frequent direction changes. However, operators should be aware that the complexity of a 24-speed system could require a steeper learning curve for optimal operation.
| Type | power shuttle |
| Gears | 24 forward and reverse |
| Clutch | wet disc |
TRANSMISSION 2
The Challenger MT445 features a syncromesh transmission with 12 forward and 4 reverse gears, allowing for smooth gear shifts and efficient power management in diverse agricultural conditions. This gear configuration enhances operational versatility, making it ideal for tasks that demand precise speed control, such as tillage or planting. However, the syncromesh system may require maintenance over time to ensure optimal performance, especially under heavy-duty usage.
| Type | syncromesh |
| Gears | 12 forward and 4 reverse |
TRANSMISSION 3
The Challenger MT445 features a mechanical shuttle transmission, which allows operators to efficiently switch between forward and reverse without clutching, enhancing productivity in tasks requiring frequent direction changes. With 12 forward and reverse gears, it offers flexibility in speed and torque adjustment, making it suitable for various applications from tillage to transport. However, mechanical shuttles may require more operator skill compared to hydrostatic systems and can present challenges in precise speed control during delicate operations.
| Type | mechanical shuttle |
| Gears | 12 forward and reverse |
MECHANICAL
The Challenger MT445 tractor offers versatile drivetrain options with 4x2 2WD, 4x4 MFWD, and 4WD configurations, allowing for adaptability in various terrains. Its hydraulic wet disc brakes provide reliable stopping power under load, while the power steering enhances maneuverability, particularly in tight spaces. The availability of a cab with air-conditioning adds operator comfort during extended use, crucial for productivity in varying climates.
| Chassis | 4x2 2WD/4x4 MFWD 4WD |
| Steering | power |
| Brakes | hydraulic wet disc |
| Cab | Two-post folding ROPS. Cab available with air-conditioning. |
| Transmissions | 24-speed power shuttle/12-speed syncromesh/12-speed mechanical shuttle |
HYDRAULICS
| Type | open center |
| Pressure | 3046psi / 210.0bar |
| Valves | 2 to 4 |
| SCV flow | 10gpm / 37.9lpm |
| Total flow | 25gpm / 94.6lpm |
TRACTOR HITCH
| Rear Type | II |
| Control | electronic draft control |
| Rear lift (at 24 | 4100lbs / 1859kg/6200lbs / 2812kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/1000 |
CHALLENGER MT445 TIRES
The Challenger MT445 features a robust tire configuration, with 12.4R24 front tires providing excellent steering control and stability, while the 13.6R38 rear tires improve traction and load-bearing capacity. This setup is particularly advantageous for heavy tillage operations, allowing for efficient power transfer and reduced soil compaction. However, the larger rear tires may limit agility in tight spaces, necessitating careful maneuvering in confined areas.
| Ag front | 12.4R24 |
| Ag rear | 13.6R38 |
DIMENSIONS
| Wheelbase | 93inches / 236cm |
| Length | 163inches / 414cm |
| Width | 77inches / 195cm |
| Height (ROPS) | 103inches / 261cm |
| Height (cab) | 100inches / 254cm |
CHALLENGER MT445 WEIGHT
| 2WD ROPS | 6211lbs / 2817kg |
| 4WD ROPS | 6546lbs / 2969kg |
| 2WD Cab | 7619lbs / 3455kg |
| 4WD Cab | 8170lbs / 3705kg |
DIMENSIONS & TIRES
The Challenger MT445's 93-inch wheelbase provides excellent stability for various field operations, particularly in hilly terrain. Weighing between 6,211 to 8,170 pounds allows for substantial traction, beneficial for heavy-duty tasks such as plowing or tilling. However, the tire dimensions (12.4R24 front and 13.6R38 rear) may limit its range of application on softer soils, potentially resulting in increased soil compaction in sensitive areas.
| Wheelbase | 93inches / 236cm |
| Weight | 6211 to 8170 pounds |
| Front tire | 12.4R24 |
| Rear tire | 13.6R38 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Battery volts | 12 |