| Manufacturer | Challenger |
| Price | - |
| Model | MT665 |
| Equipment Type | Row-Crop Tractors |
| Factory | Beauvais, France |
OCED TRACTOR TEST 1869 2
| Description | Diesel 18-speed 4WD January 1998 - July 1999, Link: OCED Tractor Test 1869 file PTO performance Drawbar performance Gear 8 used for power test. Gear 6 used for pull test |
| Max power | 183hp / 136.5kW |
| Fuel use | 14.6gal/hour / 55.3l/hour |
| Power at rated engine speed | 226.5hp / 168.9kW |
| Power at rated PTO speed | 231.3hp / 172.5kW |
| Max pull | 20925lbs / 9491kg |
CHALLENGER MT665 POWER
| PTO (claimed) | 225hp / 167.8kW |
| Drawbar (tested) | 183hp / 136.5kW |
| PTO (tested) | 239.4hp / 178.5kW |
ENGINE DETAIL
The Challenger MT665 tractor is powered by a Sisu turbocharged aftercooled diesel engine with a robust displacement of 8.4L, offering high torque and efficiency, ideal for heavy-duty agricultural applications. With a compression ratio of 16.0:1, this engine optimizes combustion efficiency, potentially enhancing fuel economy, but may lead to challenges with fuel quality requirements. Its dual paper element air cleaner is advantageous for maintaining engine cleanliness in dusty environments, thus prolonging engine life and performance.
| Description | Sisu turbocharged aftercooled diesel 6-cylinder liquid-cooled vertical |
| Displacement | 513ci / 8.4L |
| Bore/Stroke | 4.370x5.709inches / 111x 145 mm |
| Air cleaner | dual paper elements |
| Compression | 16.0:1 |
| Rated RPM | 2200 |
| Starter volts | 12 |
CHALLENGER MT665 ENGINE
The Challenger MT665 is powered by a Sisu 8.4L 6-cylinder diesel engine, offering robust performance for heavy-duty applications. With a fuel tank capacity of 120 gallons (454.2 liters), it provides extended operational range, advantageous for long hours in the field without frequent refueling. However, the large engine size may result in higher maintenance costs and increased fuel consumption in comparison to smaller tractors, making it less optimal for light-duty tasks.
| Description | Sisu 8.4L 6-cyl diesel |
| Fuel tank | 120gal / 454.2L |
TRANSMISSION
The Challenger MT665 features a power shift transmission with 18 forward and 6 reverse gears, allowing for enhanced versatility and precision in various farming tasks. The electro-hydraulic wet disc clutch provides smooth gear shifts and extended clutch life, which is advantageous in heavy-duty operations. However, maintenance of the hydraulic system is critical to prevent potential downtime and ensure optimal performance.
| Type | power shift |
| Gears | 18 forward and 6 reverse |
| Clutch | electro-hydraulic wet disc |
MECHANICAL
The Challenger MT665 tractor features a robust 4x4 MFWD chassis, enhancing traction and stability in diverse terrains, particularly beneficial for hillside or wet ground applications. Its hydraulic wet disc braking system ensures reliable stopping power under heavy load, providing safety during operation. With an 18-speed power shift transmission, operators can achieve optimal performance and efficiency for various field tasks, though mastering the transmission may require an initial learning curve.
| 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 | 19700lbs / 8935kg |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 1000 |
| Engine RPM | 1000@2091 |
CHALLENGER MT665 TIRES
The Challenger MT665 tractor features large Ag tires with a front size of 600/70R28 and a rear size of 650/85R38, ensuring excellent traction and stability on varied terrains. This tire configuration allows for enhanced flotation and reduced soil compaction, making it ideal for large-scale farming operations needing efficient tillage and transport. However, operators should be mindful of the tractor's weight and power distribution, as mismatched tire sizes could lead to uneven wear or handling challenges.
| Ag front | 600/70R28 |
| Ag rear | 650/85R38 |
DIMENSIONS
| Wheelbase | 121inches / 307cm |
| Length | 203inches / 515cm |
| Width | 98.2inches / 249cm *Minimum width |
| Height (cab) | 121inches / 307cm |
| Shiping weight | 21500lbs / 9752kg |
DIMENSIONS & TIRES
The Challenger MT665’s wheelbase of 121 inches provides stability and maneuverability, making it suitable for both fieldwork and transport. Weighing 21,500 lbs allows for substantial traction, but may limit mobility on softer ground conditions. The front and rear tire sizes (600/70R28 and 650/85R38) are optimized for load distribution and flotation, enhancing performance in varying terrains, yet could lead to higher soil compaction in sensitive fields.
| Wheelbase | 121inches / 307cm |
| Weight | 21500lbs / 9752kg |
| Front tire | 600/70R28 |
| Rear tire | 650/85R38 |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Battery volts | 12 |