| Manufacturer | Challenger |
| Price | - |
| Model | MT425 |
| Equipment Type | Utility Tractors |
| Factory | England |
OCED TRACTOR TEST 1779 2
| Description | Diesel 12-speed shuttle 4WD March 1 - May 1, 1998 Link: OCED Tractor Test 1779 file PTO performance Drawbar performance Gear 1M used for power test Gear 1L used for pull test |
| Max power | 42.5hp / 31.7kW |
| Fuel use | 3.6gal/hour / 13.6l/hour |
| Power at rated engine speed | 54.8hp / 40.9kW |
| Power at rated PTO speed | 53.4hp / 39.8kW |
| Max pull | 7,680lbs / 3483kg |
CHALLENGER MT425 POWER
| PTO (claimed) | 55hp / 41.0kW |
| Drawbar (tested) | 42.5hp / 31.7kW |
| PTO (tested) | 55.4hp / 41.3kW |
ENGINE DETAIL
The Challenger MT425 is powered by a Perkins 3054 diesel engine, featuring a displacement of 4.0L and a compression ratio of 17.3:1, which enhances fuel efficiency and performance under load. Its dual paper element air cleaner aids in maintaining optimal airflow and engine protection, while the thermostart pre-heating system facilitates cold starts in lower temperatures. With a rated RPM of 2200, this tractor balances torque and power delivery, making it suitable for a range of agricultural applications, though users should consider potential challenges with maintenance of the air filtration system in dusty environments.
| Description | Perkins 3054 diesel 4-cylinder liquid-cooled |
| Displacement | 243ci / 4.0L |
| Bore/Stroke | 3.937x5.00inches / 100x 127mm |
| Air cleaner | dual paper elements |
| Pre-heating | thermostart |
| Compression | 17.3:1 |
| Rated RPM | 2200 |
| Starter volts | 12 |
CHALLENGER MT425 ENGINE
The Challenger MT425 features a Perkins 4.0L 4-cylinder diesel engine, offering a balance of power and fuel efficiency suitable for small to medium-sized agricultural tasks. The tractor's dual fuel tank system, with a combined capacity of 63.1 gallons (239.8 liters), provides extended operation time, making it ideal for long working days in the field. However, the ROPS configuration may limit cab comfort and visibility compared to enclosed cabs, presenting a trade-off between safety and operator experience during prolonged use.
| Description | Perkins 4.0L 4-cyl diesel |
| ROPS Fuel tank | 29.1gal / 110.1L |
| Cab Fuel tank | 34gal / 128.7L |
TRANSMISSIONS OVERVIEW
The Challenger MT425 tractor features a versatile 24-speed power shuttle for seamless direction changes, enhancing operational efficiency. The 12-speed syncromesh transmission provides smoother gear shifts, ideal for varied terrain and load conditions, while the 12-speed mechanical shuttle ensures reliability in heavy-duty applications. Ideal for farming scenarios requiring precise control and adaptability, this tractor balances performance with user-friendly transmission options.
| Description | 24-speed power shuttle 12-speed syncromesh 12-speed mechanical shuttle |
TRANSMISSION 1
The Challenger MT425 features a power shuttle transmission with 24 forward and reverse gears, allowing for exceptional maneuverability and optimal performance in various agricultural applications. The wet disc clutch provides smooth engagement and reduced wear, enhancing durability under heavy loads. This setup is ideal for tasks requiring frequent direction and speed changes, such as loader work or frequent field operations.
| Type | power shuttle |
| Gears | 24 forward and reverse |
| Clutch | wet disc |
TRANSMISSION 2
The Challenger MT425 features a syncromesh transmission with a total of 12 forward and 4 reverse gears, offering smooth shifting and adaptability across various terrains. The advantage of this gear setup lies in its ability to provide optimal speed control and efficiency in both fieldwork and transport scenarios. However, syncromesh systems may have a steeper learning curve for operators unfamiliar with manual transmissions, which could pose a challenge in training and operation.
| Type | syncromesh |
| Gears | 12 forward and 4 reverse |
TRANSMISSION 3
The Challenger MT425 tractor features a mechanical shuttle transmission with 12 forward and reverse gears, providing smooth directional changes and enhanced control during various agricultural tasks. This setup allows for optimized power delivery, making it suitable for operations requiring frequent speed adjustments, such as loading or towing. However, the mechanical shuttle may not offer the same level of convenience as hydraulic systems, potentially limiting user comfort during extended operations.
| Type | mechanical shuttle |
| Gears | 12 forward and reverse |
MECHANICAL
The Challenger MT425 features a versatile 4x2 and 4x4 configuration, allowing it to adapt to various terrain types efficiently. Its hydraulic wet disc brakes provide reliable stopping power under heavy loads, enhancing safety and performance. The available air-conditioned cab and 24-speed power shuttle transmission offer operator comfort and efficient power management, making it suitable for tasks requiring precision and extended operation hours.
| 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 MT425 TIRES
The Challenger MT425, equipped with Ag front tires 360/70R24 and Ag rear tires 18.4R30, offers enhanced traction and stability, making it suitable for diverse field operations, including tillage and planting. The tire size combination ensures a low center of gravity, improving maneuverability in tight spaces and hilly terrains. However, the relatively small rear tire size may limit its capacity for heavier implements, necessitating careful selection based on the intended agricultural tasks.
| Ag front | 360/70R24 |
| Ag rear | 18.4R30 |
DIMENSIONS
| Wheelbase | 93inches / 236cm |
| 2WD Length | 158inches / 401cm |
| 4WD Length | 161inches / 408cm |
| Width | 77inches / 195cm |
| Height (ROPS) | 103inches / 261cm |
| Height (cab) | 96inches / 243cm |
CHALLENGER MT425 WEIGHT
| 2WD ROPS | 6182lbs / 2804kg |
| 4WD ROPS | 6520lbs / 2957kg |
| 2WD Cab | 6935lbs / 3145kg |
| 4WD Cab | 7487lbs / 3396kg |
DIMENSIONS & TIRES
The Challenger MT425 features a compact wheelbase of 93 inches (236 cm), providing enhanced maneuverability in tight spaces, advantageous for smaller farms or specialized tasks. With a weight range of 6182 to 7487 pounds, it offers stability under load but may limit transport speed on public roads. The front tire size of 360/70R24 coupled with 18.4R30 rear tires ensures a balance between traction and flotation, suitable for various field operations but may require careful consideration when operating on softer terrain.
| Wheelbase | 93inches / 236cm |
| Weight | 6182 to 7487 pounds |
| Front tire | 360/70R24 |
| Rear tire | 18.4R30 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Battery volts | 12 |