Row Crop
Challenger MT645
The Challenger MT645 is a powerful row crop tractor built for serious farming. It has a strong 6-cylinder diesel engine made by Sisu/Valmet. This engine is turbocharged and aftercooled, which means it can work hard in tough conditions. The tractor has a 4x4 drive system and power steering, making it easy to control in the field. The MT645 has a special transmission with 18 forward gears and 6 reverse gears. This gives farmers lots of options when working at different speeds. The tractor is big, measuring 203 inches long and 121 inches tall. It weighs 19,020 pounds, which is above average for tractors like this. The MT645 has a closed center hydraulic system and a comfortable cab for the driver. It also has a rear hitch that can handle heavy equipment. Some extra features include wet disc brakes, a powerful PTO, and options for high-flow hydraulics.
ManufacturerChallengerEngine6-cylTransSelective gear fixed ratio with full range operator controlled powershift
Quick specs
- Category
- Row Crop
- Operating Weight
- 19,020 lb
- Transmission
- Selective gear fixed ratio with full range operator controlled powershift
Overview
About the Challenger MT645
The Challenger MT645 is a powerful row crop tractor built for serious farming. It has a strong 6-cylinder diesel engine made by Sisu/Valmet. This engine is turbocharged and aftercooled, which means it can work hard in tough conditions. The tractor has a 4x4 drive system and power steering, making it easy to control in the field. The MT645 has a special transmission with 18 forward gears and 6 reverse gears. This gives farmers lots of options when working at different speeds. The tractor is big, measuring 203 inches long and 121 inches tall. It weighs 19,020 pounds, which is above average for tractors like this. The MT645 has a closed center hydraulic system and a comfortable cab for the driver. It also has a rear hitch that can handle heavy equipment. Some extra features include wet disc brakes, a powerful PTO, and options for high-flow hydraulics.
Full specifications
Every recorded spec
General
| Manufacturer | Challenger |
|---|---|
| Model | MT645 |
| Category | Row Crop tractor |
| Type | 4x4 MFWD 4WD |
| Operating weight | 19,020lb |
Engine
| Make | Sisu/Valmet Diesel |
|---|---|
| Cylinders | 6 |
| Displacement | 449ci |
| Bore | 4.25in |
| Stroke | 5.28in |
Transmission
| Type | Selective gear fixed ratio with full range operator controlled powershift |
|---|---|
| Forward gears | 18 |
| Reverse gears | 6 |
Chassis & drive
| Chassis | 4x4 MFWD 4WD |
|---|---|
| Steering | Power Steering (Hydrostatic) |
| Cab | Cab |
Hydraulics
| Type | Closed Center Pressure Flow Compensated (PFC) |
|---|
Dimensions
| Length | 203in |
|---|---|
| Width | 98.2in |
| Height | 121in |
| Operating weight | 19,020lb |
Head to head
MT645 vs. Row Crop median
How the Challenger MT645 compares to other Row Crop tractors
| Spec | This model | Row Crop median | Difference | Percentile |
|---|---|---|---|---|
| Engine Displacement | 449 ci | 391 ci | +15% | 77th |
| Cylinders | 6 | 6 | at median | 50th |
| Forward Gears | 18 | 16 | +13% | 61st |
| Operating Weight | 19,020 lb | 12,307 lb | +55% | 81st |
| Length | 203 in | 180 in | +13% | 78th |
| Width | 98.2 in | 91.2 in | +8% | 79th |
| Height | 121 in | 114 in | +7% | 76th |
Medians and percentiles are computed from the row crop tractors in our database with a recorded value for each spec (sample sizes 806–1,417 models).
Compare to tractors with similar specs
Commonly compared Challenger tractors
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Challenger 1050 | 485 hp | 31,615 lb | 2017+ | Compare → |
| Challenger MT475D | 123 hp | 15,765 lb | — | Compare → |
| Challenger MT535 | — | 9,600 lb | — | Compare → |
| Challenger MT545 | — | 10,082 lb | — | Compare → |
| Challenger MT555B MFWD | 130 hp | 15,000 lb | — | Compare → |
Commonly compared tractors with similar horsepower from other brands
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Advance-Rumely 6A | — | 6,370 lb | — | Compare → |
| Advance-Rumely DoAll | — | 3,702 lb | — | Compare → |
| Advance-Rumely OilPull B 25/45 | — | 25,000 lb | — | Compare → |
| Advance-Rumely OilPull E 30/60 | — | 26,300 lb | — | Compare → |
| Advance-Rumely OilPull F 15/30 | — | 16,500 lb | — | Compare → |
Explore
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Gallery
Challenger MT645 photos
FAQ
Common questions
What engine configuration does the Challenger MT645 use?
The Challenger MT645 is equipped with a 6-cylinder engine displacing 449 ci.
What hydraulics does the Challenger MT645 have?
The Challenger MT645 uses a Closed Center Pressure Flow Compensated (PFC) hydraulic system.
What three-point hitch category does the Challenger MT645 use?
The Challenger MT645 has a Category III three-point hitch.
How much does the Challenger MT645 weigh?
The Challenger MT645 weighs about 19,020 lb in operating condition.
What transmission is in the Challenger MT645?
Transmission on the Challenger MT645 is Selective gear fixed ratio with full range operator controlled powershift, with 18 forward speeds.
What maintenance does the Challenger MT645 require?
Like any tractor, the Challenger MT645 needs periodic engine oil and filter changes, hydraulic fluid checks, and regular greasing and inspection. The owner's manual lists the manufacturer's recommended service intervals.