Challenger MT645

The Challenger MT645 is a tractor produced by Challenger. It is equipped with a 449 ci 7.4 L engine. The listed engine power is 181.26 hp 135.2 kW. Transmission: 18 forward and 6 reverse. Operating weight: 19000 lbs 8618 kg.

Engine Power

181.26 hp 135.2 kW

Fuel & Capacities

120 gal 454.2 L

Transmission

18 forward and 6 reverse

Operating Weight

19000 lbs 8618 kg

Overview

	2002 - 2003 MT600 SeriesRow-Crop tractor MT600 Series Row-Crop tractor

Production
Manufacturer	Challenger (a part of AGCO)
Row-Crop tractor
Built in Beauvais, France
The Challenger MT645 is similar to the Massey Ferguson 8260.

Challenger MT645 Engine
Sisu 7.4L 6-cyl diesel
Fuel tank	120 gal 454.2 L
Engine details ...

Challenger MT645 Transmission
18-speed power shift
Transmission details ...

Challenger MT645 Power
PTO (claimed)	180 hp 134.2 kW
PTO (tested)	184.49 hp 137.6 kW
Performance test details ...

Mechanical
Four-wheel drive
Power steering
Hydraulic wet disc brakes
Cab standard with air-conditioning.

Hydraulics
Type	closed center pressure flow compensated (PFC)
Pressure	2900 psi 200.0 bar
Valves	4
Total flow	29 gpm 109.8 lpm
	39 gpmOptOptional 147.6 lpm

Tractor hitch
Rear Type	III
Rear lift (at 24"/610mm)	18400 lbs 8346 kg

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	1000
Engine RPM	1000@2091

Dimensions & Tires
Wheelbase	121 inches 307 cm
Weight	19000 lbs 8618 kg
Front tire	14.9R30
Rear tire	18.4R42
Full dimensions and tires ...

Electrical
Ground	negative
Charging system	alternator
Battery volts	12

References

Challenger MT500/MT600 published in 2002, by AGCO

Engine

Engine Detail — 449 ci / 7.4 L Diesel

Manufacturer	Sisu
Configuration	turbocharged aftercooled diesel, 6-cylinder, liquid-cooled vertical
Displacement	449 ci 7.4 L
Bore/Stroke	4.251x5.278 inches 108 x 134 mm
Air cleaner	dual paper elements
Compression	16.5:1
Rated RPM	2200
Starter volts	12

Transmission

Transmission — 18 forward and 6 reverse power shift

Type	power shift
Gears	18 forward and 6 reverse
Clutch	electro-hydraulic wet disc

Dimensions

Challenger MT645 Tires
Ag front	14.9R30
Ag rear	18.4R42

Dimensions
Wheelbase	121 inches 307 cm
Length	203 inches 515 cm
Width	98.2 inches*Minimum width 249 cm
Height (cab)	121 inches 307 cm
Shipping weight	19000 lbs 8618 kg

Tests

Nebraska Tractor Test 1782C
Diesel 18-speed 4WD September 19 - 26, 2000 Link: Nebraska Tractor Test 1782C file
PTO performance
Max power	184.49 hp 137.6 kW
Fuel use	10.6 gal/hour 40.1 l/hour
Power at rated engine speed	181.26 hp 135.2 kW
Fuel use	11.3 gal/hour 42.8 l/hour
Power at rated PTO speed	183.87 hp 137.1 kW
Fuel use	10.9 gal/hour 41.3 l/hour

Photos

Challenger MT645 tractor photo

Recommended Implements & Sizing Guide

Engineering recommendations for Challenger MT645 based on its 181.26 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	5 to 7 Bottom (18")5 - 7 铧 (45 cm)	Commercial / Field Scale	Large acreage tillage; requires front ballast weights.
Rotary Cutter / MowerMowing & Clearing	15 to 20 ft Batwing4.6 - 6.1 m 宽幅折叠翼	Commercial / Field Scale	Large commercial field and roadside mowing operations.
Rotary TillerSeedbed Prep	90 to 120 in Heavy Duty230 - 300 cm 重型旋耕机	Commercial / Field Scale	Deep intensive seedbed preparation for commercial row crops.
Disc HarrowSecondary Tillage	15 to 22 ft Folding Disc4.5 - 6.7 m 折叠式圆盘耙	Commercial / Field Scale	Wide commercial field leveling; requires hydraulic remotes.
Hay BalerHay & Forage	Large Square Baler (3x4 or 4x4)大方捆商用打捆机 (1.2x1.2 m)	Commercial / Field Scale	High-capacity commercial forage harvesting (1000 RPM PTO).

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 MT645.

Estimated Continuous Field Runtime: 12.7 hrs

Approximately 12.7 hours of continuous field operation at ~75% rated power on a full tank (120 gal / 454.2 L).

Estimated 75% Load Fuel Burn~9.4 gal/hr (35.7 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