Challenger MT425B

The Challenger MT425B is a tractor produced by Challenger. It is equipped with a 268 ci 4.4 L engine. The listed engine power is Diesel (listed): 75 hp / 55.9 kW. Transmission: Autopower IV. Operating weight: 8885 to 9515 pounds.

Engine Power

Diesel (listed): 75 hp / 55.9 kW

Fuel & Capacities

Diesel

Transmission

Autopower IV

Operating Weight

8885 to 9515 pounds

Overview

	2004 - 2010 Model year 2004-20072008-2010 MT400B SeriesUtility tractor MT400B Series Utility tractor

Production
Manufacturer	Challenger (a part of AGCO)
Utility tractor
Built in Beauvais, France
The Challenger MT425B is similar to the Massey Ferguson 5435

Challenger MT425B Engine
Caterpillar 4.4L 4-cyl diesel
Engine details ...

Challenger MT425B Transmission
16-speed four speed power shift
Transmission details ...

Challenger MT425B Power
Engine	75 hp 55.9 kW
PTO (claimed)	60 hp 44.7 kW
Drawbar (tested)	48.5 hp 36.2 kW
PTO (tested)	61.7 hp 46.0 kW
Performance test details ...

Mechanical
Two- or four-wheel drive
Power steering
Hydraulic wet disc brakes
Cab optional.

Tractor hitch
Rear Type	II

Power Take-off (PTO)
Rear PTO Type	540/1000

Dimensions & Tires
Weight	8885 to 9515 pounds
Front tire	7.50-16
Rear tire	18.4R34
Full dimensions and tires ...

Electrical
Ground	negative
Battery volts	12

References

Challenger MT400B Product Information Guide published in 2003, by AGCO
Challenger MT400B Series published in 2004, by AGCO

Engine

Engine Detail — 268 ci / 4.4 L Diesel

Manufacturer	Caterpillar 3054
Fuel Type	Diesel
Configuration	4-cylinder, liquid-cooled vertical
This engine was alternatively branded as a Perkins 1104C depending on market.
Displacement	268 ci 4.4 L
Bore/Stroke	4.134x5.00 inches 105 x 127 mm
Emissions	Tier 2
Power	75 hp 55.9 kW
Fuel system	direct injection
Air cleaner	dual paper elements
Compression	19.3:1
Rated RPM	2200
Starter volts	12

Transmission

Transmission — Autopower IV

Transmission	Autopower IV
Type	four speed power shift
Gears	16 forward and reverse
Clutch	wet disc
Four power shift gears in four ranges.
With 18.4R38 rear tires.

Dimensions

Challenger MT425B Tires
Ag front	7.50-16 (2WD)
	14.9R24 (4WD)
Ag rear	18.4R34

Dimensions
2WD Weight	8885 lbs 4030 kg
4WD Weight	9515 lbs 4316 kg

Tests

OCED Tractor Test 2275
Diesel 16-speed 4WD January 2005 - February 2005, Link: OCED Tractor Test 2275 file
PTO performance
Max power	61.7 hp 46.0 kW
Fuel use	4.0 gal/hour 15.1 l/hour
Power at rated engine speed	61.0 hp 45.5 kW
Fuel use	4.0 gal/hour 15.1 l/hour
Power at rated PTO speed	59.7 hp 44.5 kW
Fuel use	3.7 gal/hour 14.0 l/hour
Drawbar performance
Max power	48.5 hp 36.2 kW
Fuel use	3.9 gal/hour 14.8 l/hour
Gear 3TC used for power test.
Max pull	8385 lbs 3803 kg
Gear 2TC used for pull test.

Photos

Challenger MT425B tractor photo

Recommended Implements & Sizing Guide

Engineering recommendations for Challenger MT425B based on its 75 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	3 to 4 Bottom (16")3 - 4 铧 (40 cm)	Heavy Duty	Suitable for medium loam and stubble turnover.
Rotary Cutter / MowerMowing & Clearing	7 to 8 ft (84-96 in)2.1 - 2.4 m	Heavy Duty	Heavy-duty twin spindle cutter for overgrown acreage.
Rotary TillerSeedbed Prep	78 to 84 in200 - 215 cm	Heavy Duty	Heavy commercial tiller with multi-speed gearbox.
Disc HarrowSecondary Tillage	10 to 14 ft Tandem / Offset3.0 - 4.2 m 重型交错耙	Heavy Duty	Aggressive residue cutting in corn/cotton stubble.
Hay BalerHay & Forage	4x4 to 4x5 Round Baler1.2x1.5 m 紧凑圆捆机	Heavy Duty	Silage and dry hay; 540 RPM PTO with slip-clutch.

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for Challenger MT425B.

Estimated Continuous Field Runtime: 1 hrs

Approximately 1 hours of continuous field operation at ~75% rated power on a full tank (3.9 gal / 14.8 L).

Estimated 75% Load Fuel Burn~3.9 gal/hr (14.8 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours