Challenger MT445B

The Challenger MT445B is a tractor produced by Challenger. It is equipped with a 268 ci 4.4 L engine. The listed engine power is Diesel (listed): 85 hp / 63.4 kW. Transmission: Autopower IV. Operating weight: 8,840 lbs (2WD) 4009 kg.

Engine Power

Diesel (listed): 85 hp / 63.4 kW

Fuel & Capacities

40 gal 151.4 L

Transmission

Autopower IV

Operating Weight

8,840 lbs (2WD) 4009 kg

Overview

	2004 - 2013 Model year 2004-20072008-2013 MT400B SeriesUtility tractor MT400B Series Utility tractor

Production
Manufacturer	Challenger (a part of AGCO)
Utility tractor
Built in Beauvais, France
The Challenger MT445B is similar to the Massey Ferguson 5445.

Challenger MT445B Engine
Caterpillar 4.4L 4-cyl diesel
Fuel tank	40 gal 151.4 L
Engine details ...

Challenger MT445B Transmission
16-speed four speed power shift
Transmission details ...

Challenger MT445B Power
Engine	85 hp 63.4 kW
PTO (claimed)	70 hp 52.2 kW
Drawbar (tested)	60.5 hp 45.1 kW
PTO (tested)	75.9 hp 56.6 kW
Performance test details ...

Mechanical
Two- or four-wheel drive
Final drives	inboard planetary
Differential lock	electro-hydraulic
Steering	hydrostatic power
Hydraulic wet disc brakes
ROPS. Cab optional with air-conditioning.

Hydraulics
ROPS Type	open center
Cab Type	closed center load sensing
Pressure	2900 psi 200.0 bar
Valves	2 to 4
Pump flow	26.4 gpm (open center) 99.9 lpm
	29 gpm (CCLS) 109.8 lpm

Tractor hitch
Rear Type	II
Control	electronic top-link draft control
Rear lift (at 24"/610mm)	7285 lbs 3304 kg
Rear Arms	telescopic stabilizers and link ends

Power Take-off (PTO)
Rear PTO	independent
Clutch	electro-hydraulic wet disc
Rear PTO Type	540/1000
	540/540E/1000/1000E

Dimensions & Tires
Wheelbase	97 inches 246 cm
Weight	8840 to 9445 pounds
Front tire	10.00-16
Rear tire	480/70R38
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
Challenger Specialty Wheel Tractors published in 2007

Engine

Engine Detail — 268 ci / 4.4 L Diesel

Manufacturer	Caterpillar 3054T
Configuration	turbocharged diesel, 4-cylinder, liquid-cooled vertical
This engine was alternative 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	85 hp 63.4 kW
Air cleaner	dual paper elements
Compression	17.5:1
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.

Dimensions

Challenger MT445B Tires
Ag front	10.00-16 (2WD)
	13.6R28 (4WD)
Ag rear	480/70R38

Dimensions
Wheelbase	97 inches 246 cm
Weight	8,840 lbs (2WD) 4009 kg
	9,445 lbs (4WD) 4284 kg
Flange rear axle

Tests

OCED Tractor Test 2291
Diesel 16-speed 4WD September 2004 - 2004, Link: OCED Tractor Test 2291 file
PTO performance
Max power	75.9 hp 56.6 kW
Fuel use	4.7 gal/hour 17.8 l/hour
Power at rated engine speed	70.7 hp 52.7 kW
Fuel use	5.0 gal/hour 18.9 l/hour
Power at rated PTO speed	73.4 hp 54.7 kW
Fuel use	4.8 gal/hour 18.2 l/hour
Drawbar performance
Max power	60.5 hp 45.1 kW
Fuel use	4.9 gal/hour 18.5 l/hour
Gear 1LC used for power test.
Max pull	8680 lbs 3937 kg
Gear 2TC used for pull test.

Photos

Challenger MT445B tractor photo

Recommended Implements & Sizing Guide

Engineering recommendations for Challenger MT445B based on its 85 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 MT445B.

Estimated Continuous Field Runtime: 9 hrs

Approximately 9 hours of continuous field operation at ~75% rated power on a full tank (40 gal / 151.4 L).

Estimated 75% Load Fuel Burn~4.4 gal/hr (16.7 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