| Manufacturer | Challenger |
| Price | - |
| Model | MT285B |
| Equipment Type | Compact Utility Tractors |
| Factory | Matsuyama, Japan |
CHALLENGER MT285B POWER
| Engine (gross) | 47.5hp / 35.4kW |
| Engine (net) | 44.5hp / 33.2kW |
| Gear PTO (claimed) | 38.0hp / 28.3kW |
| Hydro PTO (claimed) | 36.5hp / 27.2kW |
ENGINE DETAIL
The Challenger MT285B tractor features a robust Iseki E4CG diesel engine, providing 47.5hp and efficient power delivery with a wide operating RPM range of 1010-2860, beneficial for various agricultural tasks. Its indirect injection fuel system enhances fuel efficiency while the dry air cleaner reduces maintenance efforts in dusty environments. However, the relatively high compression ratio of 21.8:1 may require careful attention to fuel quality to avoid knocking under load.
| Description | Iseki E4CG diesel 4-cylinder liquid-cooled |
| Displacement | 134.1ci / 2.2L |
| Bore/Stroke | 3.43x3.64inches / 87x 92mm |
| Power (gross) | 47.5hp / 35.4kW |
| Fuel system | indirect injection |
| Air cleaner | dry |
| Pre-heating | glow plugs |
| Compression | 21.8:1 |
| Rated RPM | 2600 |
| Operating RPM | 1010-2860 |
| Starter volts | 12 |
| Oil capacity | 8.5qts / 8.0L |
| Coolant capacity | 8qts / 7.6L |
CHALLENGER MT285B ENGINE
The Challenger MT285B features a compact Iseki 2.2L 4-cylinder diesel engine, providing a balance of power and efficiency. Advantages include improved fuel economy and lower emissions, making it suitable for small to medium agricultural tasks. However, the limited engine displacement may challenge performance under heavy load conditions, requiring careful operational management for optimal use.
| Description | Iseki 2.2L 4-cyl diesel |
TRANSMISSIONS OVERVIEW
The Challenger MT285B tractor features a hydrostatic transmission with an 8-speed option and a 12-speed partially synchronized transmission with a power shuttle, enhancing operational flexibility and smooth power transitions. The hydrostatic system provides seamless speed control for tasks requiring precision, while the partially synchronized transmission allows for effective gear shifting during load changes. However, users may need to account for potential increased maintenance complexity with the advanced transmission systems.
| Description | hydrostatic 8-speed 12-speed partially synchronized with power shuttle |
TRANSMISSION 1
The Challenger MT285B's hydrostatic transmission allows for seamless shifting without interruption, enhancing operator efficiency during variable load conditions. With an infinite (3-range) gear system, the tractor provides versatile speed control for diverse agricultural tasks, though this may limit extreme speed capabilities compared to traditional gear systems. The oil capacity of 40.2 quarts ensures optimal lubrication and cooling, crucial for prolonged operation and maintenance, potentially reducing engine wear in demanding environments.
| Type | hydrostatic |
| Gears | infinite (3-range) forward and reverse |
| Oil capacity | 40.2qts / 38.0L |
SPEEDS 1
| Description | With 17.5L-24 R4 rear tires |
TRANSMISSION 2
The Challenger MT285B features a SynchroShuttle transmission with 8 forward and reverse gears, allowing for adaptable speed control suitable for various field tasks. The mechanical dry disc clutch may present challenges in achieving smooth engagements compared to hydraulic alternatives, affecting operator comfort during heavy-duty applications. With an oil capacity of 40.2 quarts (38.0L), maintaining proper lubrication is essential to ensure optimal performance and longevity under load.
| Transmission | SynchroShuttle |
| Gears | 8 forward and reverse |
| Clutch | mechanical dry disc |
| Oil capacity | 40.2qts / 38.0L |
| Description | Four non-synchronized gears in two non-synchronized ranges, with synchronized shuttle shift |
SPEEDS 2
| Description | With 16.9x24 R1 rear tires |
TRANSMISSION 3
The Challenger MT285B features a PowerShuttle transmission, enabling seamless forward to reverse shifts without the use of the clutch, which enhances operational efficiency during fieldwork. With a partially synchronized system providing 12 forward and reverse gears, the tractor offers flexible speed options suitable for varying applications. However, the reliance on clutch for in-range gear changes may pose a challenge for operators seeking constant speed without interruptions in high-demand tasks.
| Transmission | PowerShuttle |
| Type | partially synchronized with power shuttle |
| Gears | 12 forward and reverse |
| Clutch | dry main, wet shuttle |
| Oil capacity | 40.2qts / 38.0L |
| Description | Three ranges with four gears each. Transmission can be shifted from forward to reverse on the go, without the clutch. In-range gear changes can be made on the go with the clutch |
SPEEDS 3
| Description | With 16.9x24 R1 rear tires |
MECHANICAL
The Challenger MT285B features a robust 4x4 MFWD chassis, enhancing traction and stability across various terrain conditions. Its mechanical rear differential lock and wet disc brakes offer reliable performance for heavy-duty tasks, while the hydrostatic transmission provides smooth power delivery, especially in precision applications. Operators may appreciate the optional air-conditioning in the two-post foldable ROPS cab for enhanced comfort during extended usage, although the absence of full ROPS could pose a safety challenge in certain environments.
| Chassis | 4x4 MFWD 4WD |
| Final drives | spur gear |
| Differential lock | mechanical rear |
| Steering | power |
| Brakes | wet disc |
| Cab | Two-post foldable ROPS. Cab optional with air-condtioning |
| Transmissions | hydrostatic 8-speed 12-speed partially synchronized with power shuttle |
CAPACITY
| Fuel | 13.2gal / 50.0L |
| Hydraulic system | 10gal / 37.9L |
HYDRAULICS
| Type | open center |
| Capacity | 10gal / 37.9L |
| Pressure | 2276psi / 156.9bar |
| Rear valves | 2 |
| Mid valves | 2 |
| Pump flow | 10.5gpm / 39.7lpm |
| Total flow | 14.9gpm / 56.4lpm (sync shuttle) 15.9gpm / 60.2lpm (power shuttle/hydro) |
| Steering flow | 4.4gpm / 16.7lpm (sync shuttle) 5.4gpm / 20.4lpm (power shuttle/hydro) |
| Steering press. | 2276psi / 156.9bar |
TRACTOR HITCH
| Rear Type | I |
| Control | position and response control optional top-link draft control |
| Rear lift (at ends) | 3483lbs / 1579kg |
| Rear lift (at 24 | 3086lbs / 1399kg |
| Rear Arms | telescopic link ends |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Clutch | electro-hydraulic wet disc |
| Rear RPM | 540 (1.375) |
| Mid PTO | independent |
| Mid RPM | 2000 (1.00) |
CHALLENGER MT285B TIRES
The Challenger MT285B offers versatile tire options across agricultural, lawn/turf, and industrial applications, enhancing its adaptability for diverse operational contexts. Its ag front tire size of 9.5-16 and rear size of 16.9-24 provide optimal traction for fieldwork, ideal for tillage and crop management. However, the varying tire sizes may present challenges in stability and load distribution, particularly in steep terrains or uneven surfaces.
| Ag front | 9.5-16 |
| Ag rear | 16.9-24 |
| Lawn/turf front | 27x10.50-15 |
| Lawn/turf rear | 44x18.00-20 |
| Industrial front | 10-16.5 |
| Industrial rear | 17.5L-24 |
DIMENSIONS
| Wheelbase | 76inches / 193cm |
| Length | 132.7inches / 337cm |
| Width | 65.4inches / 166cm *Minimum width |
| Height (ROPS) | 89.1inches / 226cm |
| Ground clearance | 14.8inches / 37cm |
CHALLENGER MT285B WEIGHT
| 3660lbs / 1660kg | |
| Max capacity | 8378lbs / 3800kg |
| Max front axle | 4630lbs / 2100kg |
| Max rear axle | 4630lbs / 2100kg |
DIMENSIONS & TIRES
The Challenger MT285B tractor has a compact wheelbase of 76 inches (193 cm), enhancing maneuverability in tight spaces and allowing for efficient operation in various agricultural scenarios. Weighing 3,660 lbs (1,660 kg), its weight distribution can improve traction and reduce soil compaction, although it may challenge transportability on narrow roads. The tire specifications (front: 9.5-16; rear: 16.9-24) suggest a balance between stability and performance, making it suitable for diverse terrains, yet requiring careful consideration for replacement and maintenance costs.
| Wheelbase | 76inches / 193cm |
| Weight | 3660lbs / 1660kg |
| Front tire | 9.5-16 |
| Rear tire | 16.9-24 |
ATTACHMENT OVERVIEW
| Description | Front-end loader Backhoe |
CHALLENGER ML40B LOADER
| Height (to pin) | 114.5inches / 290cm |
| Clearance, dumped bucket | 84inches / 213cm |
| Dump reach | 22inches / 55cm |
| Dump angle | 47° |
| Reach at ground | 75inches / 190cm |
| Rollback angle | 30° |
| Breakout force (at pin) | 3252lbs / 1475kg |
| Lift to full height (at pin) | 2500lbs / 1134kg |
| Lift to full height (at 500mm) | 1921lbs / 871kg |
| Lift to 1.5m (at 500mm) | 2249lbs / 1020kg |
| Bucket width | 72inches / 182cm |
| Raise time to height | 4.5 s |
| Bucket dump time | 1.1 s |
| Lowering time | 2.9 s |
| Rollback time | 3.3 s |
CHALLENGER MH30B BACKHOE
| Backhoe type | Challenger MH30B Backhoe |
| Transport height | 81.5inches / 207cm |
| Bucket width | 10inches / 25cm 12inches / 30cm 16inches / 40cm 24inches / 60cm 37inches / 93cm |
| Digging depth | 100inches / 254cm |
| Reach from pivot | 127inches / 322cm |
| Bucket Rotation | 165 |
| Swing Arc | 180 |
| Bucket force | 4160lbs / 1886kg |
| Dipperstick force | 2600lbs / 1179kg |
ELECTRICAL
| Ground | negative |
| Charging system | alternator |
| Charging amps | 40 |
| Battery CCA | 710 |
| Battery volts | 12 |