| Manufacturer | Challenger |
| Price | 263,455(USD) |
| Model | MT645D |
| Equipment Type | Row-Crop Tractors |
| Factory | Jackson, Minnesota, USA |
ENGINE DETAIL
The Challenger MT645D tractor features a robust AGCO Power turbocharged diesel engine with a displacement of 8.4L, providing a gross power of 240hp and a maximum power of 270hp, ideal for demanding agricultural applications. Its selective catalytic reduction (SCR) emission control aligns with Interim Tier IV standards, promoting lower emissions while maintaining performance efficiency. The electronic high-pressure common rail fuel system and 16.7:1 compression ratio enhance fuel economy and power delivery, making it suitable for both high-load operations and extended working hours.
| Description | AGCO Power turbocharged air-to-air intercooled diesel 6-cylinder liquid-cooled |
| Displacemen | 513.8ci / 8.4L |
| Bore/Strok | 4.370x5.709inches / 111x 145 mm |
| Emission | Interim Tier IV |
| Emission contro | selective catalytic reduction (SCR) |
| Power (gross | 240hp / 179.0kW |
| Maximum Powe | 270hp / 201.3kW |
| Fuel syste | electronic high-pressure common rail |
| Pre-heatin | thermostart |
| Compressio | 16.7:1 |
| Rated RP | 2100 |
| Starte | electric |
| Starter volt | 12 |
CHALLENGER MT645D ENGINE
The Challenger MT645D is powered by an AGCO Power 8.4L six-cylinder diesel engine, delivering robust torque for heavy-duty applications. With its optimal balance of horsepower and fuel efficiency, it excels in tasks requiring substantial pulling power, such as plowing and tilling. However, potential challenges include maintenance costs associated with high-performance diesel engines and ensuring compliance with emissions regulations.
| Description | AGCO Power 8.4L 6-cyl diesel |
TRANSMISSION
The Challenger MT645D, equipped with a Techstar CVT, offers a continuously variable transmission that delivers seamless power delivery and improved fuel efficiency. Its infinite forward and reverse gears enhance operational flexibility, making it ideal for a range of applications from tillage to transport operations. However, the complexity of CVT systems may require specialized maintenance knowledge, which could pose challenges in field repairs.
| Transmissio | Techstar CVT |
| Typ | continuously variable transmission |
| Gear | infinite forward and reverse |
CHALLENGER MT645D TRANSMISSION
The Challenger MT645D features a continuously variable transmission (CVT), which enhances operational efficiency by providing seamless acceleration and deceleration, reducing fuel consumption and engine stress. This allows the operator to maintain optimal engine RPM across varying load conditions, improving performance during tasks like plowing and planting. However, the complexity of CVTs may lead to higher maintenance costs and require specialized servicing compared to traditional gear-driven systems.
| Description | continuously variable transmission |
MECHANICAL
The Challenger MT645D tractor features an advanced four-wheel drive system with inboard planetary final drive, providing enhanced traction and stability on various terrains. Its hydraulic wet disc brakes offer superior stopping power, while the electro-hydraulic differential lock can improve traction in challenging conditions—ideal for demanding agricultural tasks. The optional pneumatic or hydraulic trailer brake systems provide versatility in towing and implement management, allowing for optimized operational efficiency.
| Description | Four-wheel drive/Hydraulic wet disc brakes/Cab standard with air-conditioning and OptiRide Plus hydraulic suspension AGCO System 150 (optional); AGCOMMAND (optional) |
| Final drive | inboard planetary |
| Differential loc | electro-hydraulic |
| Steerin | hydrostatic power |
| Trailer brake | pneumatic (optional)/hydraulic (optional) |
CAPACITY
| Fue | 167gal / 632.1L |
| Exhaust fluid (DEF | 16gal / 60.6L |
| Hydraulic syste | 29.1gal / 110.1L |
HYDRAULICS
| Typ | closed center load sensing (CCLS) |
| Capacit | 29.1gal / 110.1L |
| Pressur | 2900psi / 200.0bar |
| Valve | 4 to 6 |
| SCV flo | 26.4gpm / 99.9lpm |
| Total flo | 46gpm / 174.1lpm |
TRACTOR HITCH
| Rear Typ | III |
| Rear lif | 22760lbs / 10323kg |
| Front Hitc | III (optional) |
| Front lift (at ends | 11000lbs / 4989kg |
| Drawba | Cat. 3/Cat. 3 Heavy-Duty (optional)/Cat. 4 (optional) |
POWER TAKE-OFF (PTO)
| Rear PT | independent |
| Clutc | electro-hydraulic |
| Rear RP | 1000 / 1000E (1.75)/540E/1000 / 1000E (optional) |
| Engine RP | 540E@1577 / 1000E@1605 / 1000@1970 |
CHALLENGER MT645D TIRES
The Challenger MT645D tractor is equipped with standard ag tires that enhance traction and stability, with front tires sized 480/70R34 and rear tires at 520/85R46. This tire combination provides a balance of floatation and grip, making it suitable for various field conditions, though its larger rear tires may increase soil compaction risks in certain scenarios. Adequate tire maintenance and optimal inflation are essential to maximize performance and minimize wear.
| Standard tires (ag | Front: 480/70R34. Rear: 520/85R46 |
DIMENSIONS & TIRES
The Challenger MT645D tractor, with a wheelbase of 122 inches (309 cm) and a weight of 24,250 lbs (10,999 kg), offers excellent stability for heavy-duty applications, particularly in fieldwork and transport. The front tires (480/70R34) and rear tires (520/85R46) provide a good balance of traction and floatation, essential for maneuverability in varying terrain conditions. However, its weight may pose challenges in soft soil conditions, where excessive compaction can hinder crop growth and soil health.
| Wheelbas | 122inches / 309cm |
| Weigh | 24250lbs / 10999kg |
| Front tir | 480/70R34 |
| Rear tir | 520/85R46 |
ELECTRICAL
| Groun | negative |
| Charging syste | alternator |
| Charging amp | 240 |
| Batterie | 2 |
| Battery volt | 12 |