Challenger MT845

The Challenger MT845 is a tractor produced by Challenger. It is equipped with a 729 ci 11.9 L engine. The listed engine power is Diesel (gross): 380 hp / 283.4 kW. Transmission: Caterpillar. Drive type: crawler. Operating weight: 40000 lbs 18144 kg.

Engine Power

Diesel (gross): 380 hp / 283.4 kW

Drive & Traction

crawler

Fuel & Capacities

305 gal 1154.4 L

Transmission

Caterpillar

Operating Weight

40000 lbs 18144 kg

Overview

	2002 - 2004 MT800 SeriesAgricultural Crawler tractor MT800 Series Agricultural Crawler tractor

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

Challenger MT845 Engine
Caterpillar 11.9L 6-cyl diesel
Engine details ...

Challenger MT845 Transmission
16-speed full power shift
Transmission details ...

Challenger MT845 Power
Engine (gross)	380 hp 283.4 kW
PTO (claimed)	313 hp 233.4 kW
Drawbar (tested)	297.93 hp 222.2 kW
PTO (tested)	393.14 hp 293.2 kW
Performance test details ...

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

Capacity
Fuel	305 gal 1154.4 L
	330 galOptOptional 1249.0 L
Hydraulic system	70 gal 264.9 L

Hydraulics
Type	closed center load sensing
Capacity	70 gal 264.9 L
Pressure	2900 psi 200.0 bar
Rear valves	4 to 6
Pump flow	43.5 gpm 164.6 lpm
	59 gpmOptOptional 223.3 lpm
SCV flow	30 gpm 113.6 lpm

Tractor hitch
Rear Type	IVN
Rear lift	19500 lbs 8845 kg

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

Dimensions & Tracks
Wheelbase	118.1 inches 299 cm
Weight	40000 lbs 18144 kg
18-inch tracks
Full dimensions and tracks ...

Electrical
Ground	negative
Charging system	alternator
Charging amps	160
Batteries	3
Battery volts	12

References

MT800 Series published in 2002, by AGCO

Engine

Engine Detail — 729 ci / 11.9 L Diesel

Manufacturer	Caterpillar C12
Configuration	turbocharged diesel, 6-cylinder, liquid-cooled inline
Displacement	729 ci 11.9 L
Bore/Stroke	5.118x5.906 inches 130 x 150 mm
Power (gross)	380 hp 283.4 kW
Air cleaner	dual paper elements
Compression	16.0:1
Rated RPM	2100
Starter volts	12

Transmission

Transmission — Caterpillar

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

Dimensions

Challenger MT845 Tracks
Width	18 inches 45 cm
Width	27.5 inches 69 cm
Width	30 inches 76 cm
Width	36 inches 91 cm

Dimensions
Wheelbase	118.1 inches 299 cm
Length	265.9 inches 675 cm
Width	142.1 inches 360 cm
Height (cab)	138.1 inches 350 cm
Height (exhaust)	138.7 inches 352 cm
Ground clearance	18.7 inches 47 cm
Gauge	90 to 128 inches 228 to 325 cm

Challenger MT845 Weight
Shipping	40000 lbs 18144 kg
Ballasted	50000 lbs 22680 kg
Max capacity	60000 lbs 27216 kg

Tests

OCED Tractor Test 1824
Diesel 16-speed crawker April 23 - May 13, 2003 Link: OCED Tractor Test 1824 file
PTO performance
Max power	393.14 hp 293.2 kW
Fuel use	20.1 gal/hour 76.1 l/hour
Power at rated engine speed	337.75 hp 251.9 kW
Fuel use	18.6 gal/hour 70.4 l/hour
Power at rated PTO speed	365.34 hp 272.4 kW
Fuel use	19.4 gal/hour 73.4 l/hour
Drawbar performance
Max power	297.93 hp 222.2 kW
Fuel use	19.0 gal/hour 71.9 l/hour
Gear 6 used for power test.
Max pull	38250 lbs 17350 kg
Gear 3 used for pull test.

Photos

Challenger MT845 tractor photo

Recommended Implements & Sizing Guide

Engineering recommendations for Challenger MT845 based on its 380 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 MT845.

Estimated Continuous Field Runtime: 15.4 hrs

Approximately 15.4 hours of continuous field operation at ~75% rated power on a full tank (305 gal / 1154.6 L).

Estimated 75% Load Fuel Burn~19.8 gal/hr (74.8 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