| Manufacturer | Challenger |
| Price | - |
| Model | MT635 |
| Equipment Type | Row-Crop Tractors |
| Factory | Beauvais, France |
NEBRASKA TRACTOR TEST 1781C 2
| Description | Diesel 18-speed 4WD September 15 - 26, 2000 Link: Nebraska Tractor Test 1781C file PTO performance |
| Max power | 174.62hp / 130.2kW |
| Fuel use | 10.2gal/hour / 38.6l/hour |
| Power at rated engine speed | 164.45hp / 122.6kW |
| Power at rated PTO speed | 171.41hp / 127.8kW |
CHALLENGER MT635 POWER
| PTO (claimed) | 160hp / 119.3kW |
| PTO (tested) | 174.62hp / 130.2kW |
ENGINE DETAIL
The Challenger MT635 features a robust Sisu turbocharged 6-cylinder diesel engine, delivering efficiency and power with a displacement of 7.4L and a compression ratio of 16.5:1, crucial for high-torque operations. The engine operates optimally at a rated speed of 2200 RPM, making it suitable for demanding tasks like plowing and heavy lifting. However, while the dual paper air cleaner provides effective filtration, it may require more frequent maintenance in dusty environments, potentially impacting service intervals.
| Description | Sisu turbocharged aftercooled diesel 6-cylinder liquid-cooled vertical |
| Displacement | 449ci / 7.4L |
| Bore/Stroke | 4.251x5.278inches / 108x 134mm |
| Air cleaner | dual paper elements |
| Compression | 16.5:1 |
| Rated RPM | 2200 |
| Starter volts | 12 |
CHALLENGER MT635 ENGINE
The Challenger MT635, powered by a Sisu 7.4L 6-cylinder diesel engine, delivers robust torque for agricultural applications. With a substantial 120-gallon (454.2L) fuel tank, it offers extended operational time, reducing downtime in the field. However, operators should consider the weight and maneuverability implications of the larger fuel capacity, especially in varied terrains.
| Description | Sisu 7.4L 6-cyl diesel |
| Fuel tank | 120gal / 454.2L |
TRANSMISSION
The Challenger MT635 features a power shift transmission with 18 forward and 6 reverse gears, optimizing productivity for varying field conditions. The electro-hydraulic wet disc clutch provides smooth engagement and reduced wear, enhancing durability during intensive operations. However, the complexity of the power shift system may require skilled operators for maintenance and optimal performance in heavy-duty applications.
| Type | power shift |
| Gears | 18 forward and 6 reverse |
| Clutch | electro-hydraulic wet disc |
MECHANICAL
The Challenger MT635 features a robust 4x4 MFWD chassis, enhancing traction and stability across diverse terrains, making it ideal for agricultural tasks in challenging conditions. Its hydraulic wet disc brakes provide superior stopping power and durability, reducing maintenance needs; however, this may add weight and complexity. The 18-speed power shift transmission offers flexibility and efficiency in power delivery, allowing for optimal performance across varying load conditions.
| Chassis | 4x4 MFWD 4WD |
| Steering | power |
| Brakes | hydraulic wet disc |
| Cab | Cab standard with air-conditioning |
| Transmission | 18-speed power shift |
HYDRAULICS
| Type | closed center pressure flow compensated (PFC) |
| Pressure | 2900psi / 200.0bar |
| Valves | 4 |
| Total flow | 29gpm / 109.8lpm 39gpm / 147.6lpm |
TRACTOR HITCH
| Rear Type | III |
| Rear lift (at 24 | 16100lbs / 7302kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540/1000 |
| Engine RPM | 540@1991 / 1000@2091 |
CHALLENGER MT635 TIRES
The Challenger MT635 features large agricultural tires, 14.9R30 in the front and 18.4R42 in the rear, providing enhanced traction and stability for various field conditions. This tire configuration can improve flotation in muddy or uneven terrain, but may present challenges in tighter maneuverability. It is ideal for heavy-duty tasks such as tillage or row crop farming, where reduced soil compaction and optimal power transfer are critical.
| Ag front | 14.9R30 |
| Ag rear | 18.4R42 |
DIMENSIONS
| Wheelbase | 121inches / 307cm |
| Length | 203inches / 515cm |
| Width | 98.2inches / 249cm *Minimum width |
| Height (cab) | 121inches / 307cm |
| Shiping weight | 18900lbs / 8573kg |
DIMENSIONS & TIRES
The Challenger MT635 features a wheelbase of 121 inches, providing stability during operation, particularly on uneven terrain. Weighing 18,900 lbs allows for better traction and load-bearing capabilities, making it well-suited for heavy agricultural tasks, although it may present challenges in maneuverability in tighter spaces. The combination of front tire 14.9R30 and rear tire 18.4R42 offers enhanced flotation and reduced soil compaction, ideal for fieldwork but potentially limiting road speed due to larger rear tires.
| Wheelbase | 121inches / 307cm |
| Weight | 18900lbs / 8573kg |
| Front tire | 14.9R30 |
| Rear tire | 18.4R42 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Battery volts | 12 |