Sources and field evidence
Catalog Archive: Baseline specifications compiled from historical manufacturer archives and equipment registries. Laboratory test report verification in progress.
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Engineering & Capability Benchmark
Specific output, tractive ratio, and segment percentile
Engine and power specifications
- Engine model
- Caterpillar 3056C
- Fuel type
- Diesel
- Rated horsepower
- 153 hp
- Rated PTO Power
- 141.2 hp (Challenger specification)
- Drawbar Power @ Rated Engine Speed
- 116.5 hp (Nebraska OECD Test 2218)
- Cylinders
- 6
- Displacement
- 6 L (365.2 ci)
- Bore / stroke
- 3.937x5.00 inches 100 x 127 mm
- Rated RPM
- 2200 RPM
- Crankcase oil capacity
- 20 qts (~18.9 L)
- Coolant capacity
- 29.6 qts (~28.0 L)
Maintenance picks for the MT555B
Oil capacity 20 qts — match the filter before you drain.
Transmission and chassis specifications
- Transmission type
- Continuously variable transmission (32-speed)
- Gears (forward / reverse)
- 32 forward
- Drive system
- 4WD
- Wheelbase
- 118.7 in
- Front tire
- 420/90R30
- Rear tire
- 520/85R42
- Hydraulic flow
- 29 GPM
- Rear hitch
- optional
Implement Draft & Ballast Matcher
Simulate draft resistance, drawbar power transfer, and optimal axle weight distribution for Challenger MT555B.
Optimal engine load (98%). Tractive efficiency is peaked within standard 8% - 12% slip window.
Catalog archival serial-number ranges
| Production year | Starting serial # | Ending serial # | Assembly plant |
|---|---|---|---|
| 2004 | #1 | End of run | Factory not specified |
| 2005 | #1 | End of run | Factory not specified |
| 2006 | #1 | End of run | Factory not specified |
| 2007 | #1 | End of run | Factory not specified |
Instant Used Market Valuation Projector
Algorithmic resale estimate for Challenger MT555B (2004)
Direct Segment Rivals & Showdowns
Head-to-head match-ups calibrated by horsepower and era
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Challenger
USA • 164 Models
Challenger is an American brand of agricultural tractors with a notable history in the industry. The brand was established in 1986 by the heavy equipment manufacturing giant Caterpillar Inc. During its early years under Caterpillar's ownership, Challenger tractors gained recognition for their innovative design and engineering. In 2002, the Challenger brand was acquired by AGCO, a major manufacturer in the agricultural equipment sector. Following the acquisition, Challenger tractors have been manufactured at AGCO's facility in Jackson, Minnesota, which has become a key production hub for the brand. The brand's tractors are known for their robust construction and advanced technology, reflecting both its Caterpillar heritage and AGCO's expertise in agricultural machinery. Challenger's tractors are designed to meet the needs of modern farming operations, offering a combination of power, efficiency, and reliability.
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