Challenger MT845B

The Challenger MT845B is a tractor produced by Challenger. It is equipped with a 928 ci 15.2 L engine. The listed engine power is Diesel (gross): 400 hp / 298.3 kW. Transmission: Cat Powershift. Drive type: crawler. Operating weight: 41000 to 43075 pounds.

Engine Power

Diesel (gross): 400 hp / 298.3 kW

Drive & Traction

crawler

Fuel & Capacities

305 gal 1154.4 L

Transmission

Cat Powershift

Operating Weight

41000 to 43075 pounds

Overview

	2005 - 2008 MT800B SeriesAgricultural Crawler tractor MT800B Series Agricultural Crawler tractor

Production
Manufacturer	Challenger (a part of AGCO)
Agricultural Crawler tractor
Built in Jackson, Minnesota, USA

Challenger MT845B Engine
Caterpillar 15.2L 6-cyl diesel
Fuel tank	305 gal 1154.4 L
	330 galOptOptional 1249.0 L
Engine details ...

Challenger MT845B Transmission
16-speed full power shift
Transmission details ...

Challenger MT845B Power
Engine (gross)	400 hp 298.3 kW
PTO (claimed)	335 hp 249.8 kW
Drawbar (tested)	313.27 hp 233.6 kW
PTO (tested)	402.32 hp 300.0 kW
Performance test details ...

Mechanical
Drive	crawler
Hydraulic wet disc brakes
Cab standard with air-conditioning.

Hydraulics
Type	closed center PFC
Pressure	2900 psi 200.0 bar
Rear valves	4 to 6
Total flow	43.5 gpm 164.6 lpm
	59 gpmOptOptional 223.3 lpm

Tractor hitch
Rear Type	III/IVN
Rear lift	19500 lbs 8845 kg

Power Take-off (PTO)
Rear PTO	independent
Rear PTO Type	1000 (1.75)

Dimensions & Tracks
Wheelbase	118 inches 299 cm
Weight	41000 to 43075 pounds
27.5-inch tracks
Full dimensions and tracks ...

Electrical
Ground	negative
Charging amps	185
Batteries	4
Battery CCA	1000
Battery volts	12

References

Challenger MT800B Series published in 2005, by AGCO

Engine

Engine Detail — 928 ci / 15.2 L Diesel

Manufacturer	Caterpillar C15
Configuration	turbocharged diesel, 6-cylinder 24-valve, liquid-cooled inline
Displacement	928 ci 15.2 L
Bore/Stroke	5.402x6.752 inches 137 x 172 mm
Emissions	Tier III
Power (gross)	400 hp 298.3 kW
Air cleaner	dual paper elements
Compression	16.5:1
Rated RPM	2100
Torque	1423 lb-ft 1929.6 Nm
Torque RPM	1300
Starter volts	12

Transmission

Transmission — Cat Powershift

Transmission	Cat Powershift
Type	full power shift
Gears	16 forward and 4 reverse
Clutch	hydraulic wet disc

Dimensions

Challenger MT845B Tracks
Width	27.5 inches 69 cm
Width	30 inches 76 cm
Width	36 inches 91 cm

Dimensions
Wheelbase	118 inches 299 cm
Length	265.9 inches 675 cm
Width	140.9 inches 357 cm
Height	138.1 inches 350 cm
Ground clearance	14.4 inches 36 cm

Challenger MT845B Weight
Shipping	41000 lbs 18597 kg
Operating	43075 lbs 19538 kg
Max capacity	50000 lbs 22680 kg

Tests

OCED Tractor Test 1861
Diesel 16-speed crawler October 4 - 26, 2005 Link: OCED Tractor Test 1861 file
PTO performance
Max power	402.32 hp 300.0 kW
Fuel use	23.5 gal/hour 88.9 l/hour
Power at rated engine speed	359.53 hp 268.1 kW
Fuel use	23.3 gal/hour 88.2 l/hour
Power at rated PTO speed	387.05 hp 288.6 kW
Fuel use	23.8 gal/hour 90.1 l/hour
Drawbar performance
Max power	313.27 hp 233.6 kW
Fuel use	23.6 gal/hour 89.3 l/hour
Gear 6 used for power test.
Max pull	42532 lbs 19292 kg
Gear 3 used for pull test.

Photos

Challenger MT845B tractor photo

Recommended Implements & Sizing Guide

Engineering recommendations for Challenger MT845B based on its 400 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	8+ Bottom On-Land Hitch8+ 铧重型机外牵引犁	Commercial / Field Scale	High horsepower articulated/4WD field plowing.
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	24 to 36 ft Heavy Duty Field Disc7.3 - 11.0 m 超宽重型整地耙	Commercial / Field Scale	Broad-acre grain tillage for high-drawbar tractors.
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 MT845B.

Estimated Continuous Field Runtime: 14.7 hrs

Approximately 14.7 hours of continuous field operation at ~75% rated power on a full tank (305 gal / 1154.6 L).

Estimated 75% Load Fuel Burn~20.8 gal/hr (78.7 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