Machine models

Challenger MT525B to MT565B specifications

Entries in this reference
Listing-entry count
5

Short answer

Challenger MT525B to MT565B: tractors.

Selected configuration figures
Configuration	Documented field and quantity
MT525B	Power 118 hp Weight Lower 11052 lb Upper 14835 lb
MT535B	Power 133 hp Weight Lower 11052 lb Upper 14835 lb
MT545B	Power 143 hp Weight Lower 11052 lb Upper 14835 lb
MT555B	Power 153 hp Weight Lower 14028 lb Upper 15060 lb
MT565B	Power 168 hp Weight Lower 14028 lb Upper 15060 lb

MT525B to MT565B specification matrix — Listing labels reported by the source
Publisher name	Source guide	Listing-entry count	Labels named by the source
Challenger	MT525B to MT565B	5	MT525B, MT535B, MT545B, MT555B, and MT565B

Engine
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Engine	Caterpillar 6.0L 6-cyl diesel	Caterpillar 6.0L 6-cyl diesel	Caterpillar 6.0L 6-cyl diesel	Caterpillar 6.0L 6-cyl diesel	Caterpillar 6.0L 6-cyl diesel

Transmissions
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Transmissions	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	continuously variable transmission; 32-speed partial power shift	continuously variable transmission; 32-speed partial power shift

Power
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Engine	118 hp	133 hp	143 hp	153 hp	168 hp
PTO (claimed)	95 hp	105 hp	115 hp	130 hp	145 hp
Drawbar (tested)	81.8 hp	103.8 hp	100.4 hp	116.5 hp	125.0 hp
PTO (tested)	110.9 hp	118.1 hp	125.7 hp	141.2 hp	153.1 hp

Mechanical
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Final drives	inboard planetary	inboard planetary	inboard planetary	inboard planetary	inboard planetary
Differential lock	electro-hydraulic front and rear	electro-hydraulic front and rear	electro-hydraulic front and rear	electro-hydraulic front and rear	electro-hydraulic front and rear
Trailer brakes	hydraulic Optional	hydraulic optional	hydraulic Optional	hydraulic Optional	hydraulic optional
Mechanical	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control	Two- or four-wheel drive; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control

Specification	MT565B
Steering	hydrostatic power

Capacity
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Fuel	71 gal	71 gal	71 gal	100 gal	100 gal

Specification	MT525B
AutoPower Hydraulic system	18.5 gal
CVT Hydraulic system	26.4 gal

Specification	MT535B	MT545B	MT555B	MT565B
Hydraulic system	18.5 gal (AutoPower)	18.5 gal (AutoPower)	18.5 gal (AutoPower)	18.5 gal (AutoPower)

Hydraulics
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Type	closed center pressure flow compensating (PFC)	closed center pressure flow compensating (PFC)	closed center pressure flow compensating (PFC)	closed center PFC	closed center PFC
Pressure	2,900 psi	2,900 psi	2,900 psi	2,900 psi	2,900 psi
Total flow	29 gpm	29 gpm	29 gpm	29 gpm	29 gpm

Specification	MT525B
AutoPower Capacity	18.5 gal
CVT Capacity	26.4 gal

Specification	MT525B	MT535B	MT545B
Rear valves	2 to 4	2 to 4	2 to 4

Specification	MT535B	MT545B	MT555B	MT565B
Capacity	18.5 gal (AutoPower)	18.5 gal (AutoPower)	18.5 gal (AutoPower)	18.5 gal (AutoPower)

Specification	MT555B	MT565B
Valves	4	4

Tractor hitch
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Rear Type	II/III	II/III	II/III	II/III	II/III
Front Hitch	optional	optional	optional	optional	optional

Specification	MT525B
AP Rear lift (at 24"/610mm)	8,500 lb
CVT Rear lift (at 24"/610mm)	11,200 lb

Specification	MT525B	MT535B	MT545B
Front lift	5,500 lb	5,500 lb	5,500 lb

Specification	MT535B	MT545B	MT555B	MT565B
Rear lift (at 24"/610mm)	9,391 lb	9,391 lb	14,700 lb	14,700 lb

Specification	MT555B	MT565B
Front lift (at ends)	5,500 lb	5,500 lb

Power take-off (PTO)
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Rear PTO	independent	independent	independent	independent	independent
Rear PTO Type	540/1000 (1.375)	540/1000 (1.375)	540/1000 (standard)	540/1000	540/1000
Engine RPM	540@1980	540@1980	540@1980	540@1890	540@1890

Specification	MT535B	MT545B	MT555B	MT565B
Clutch	electro-hydraulic wet disc	electro-hydraulic wet disc	electro-hydraulic wet disc	electro-hydraulic wet disc

Dimensions & Tires
Specification	MT525B	MT555B	MT565B
2WD Wheelbase	112.1 in	121.4 in	121.4 in
4WD Wheelbase	109.5 in	118.7 in	118.7 in

Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Weight	Lower 11052 lb Upper 14835 lb	Lower 11052 lb Upper 14835 lb	Lower 11052 lb Upper 14835 lb	Lower 14028 lb Upper 15060 lb	Lower 14028 lb Upper 15060 lb
Front tire	14L-16.1	11.00-16	11.00-16	420/90R30	420/90R30
Rear tire	18.4R38	580/70R38	580/70R38	520/85R42	520/85R42

Specification	MT535B	MT545B
Wheelbase	112.1 in	112.1 in

MT525B Serial Numbers
Specification	MT525B
MT525B Serial Numbers	FAQ: How to read a serial number table

Electrical
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Ground	negative	negative	negative	negative	negative
Charging system	alternator	alternator	alternator	alternator	alternator
Charging amps	120	120	120	120	120
Batteries	2	2	2	2	2
Battery CCA	420	420	420	420	420
Battery volts	12	12	12	12	12

Engine Detail
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Displacement	365.2 cu in	365.2 cu in	365.2 cu in	365.2 cu in	365.2 cu in
Bore/Stroke	3.937x5.00 in / 100 x 127 mm	3.937x5.00 in / 100 x 127 mm	3.937x5.00 in / 100 x 127 mm	3.937x5.00 in / 100 x 127 mm	3.937x5.00 in / 100 x 127 mm
Emissions	Tier II	Tier II	Tier II	Tier II	Tier II
Power	118 hp	133 hp	143 hp	153 hp	168 hp
Cooling system	viscous fan	viscous fan	viscous fan	viscous fan	viscous fan
Air cleaner	dual paper elements	dual paper elements	dual paper elements	dual paper elements	dual paper elements
Compression	17.5:1	17.5:1	17.5:1	17.5:1	17.5:1
Rated RPM	2200	2200	2200	2200	2200
Idle RPM	800-2350	800-2350	800-2350	800-2350	800-2350
Starter volts	12	12	12	12	12
Coolant capacity	29.6 qts	26.92 qts	26.92 qts	29.6 qts	26.92 qts
Engine Detail	Caterpillar 3056C; turbocharged diesel; 6-cylinder	Caterpillar 3056C; turbocharged diesel; 6-cylinder	Caterpillar 3056C; turbocharged diesel; 6-cylinder	Caterpillar 3056C; turbocharged diesel; 6-cylinder	Caterpillar 3056C; turbocharged diesel; 6-cylinder

Specification	MT525B	MT535B
Fuel system	electronic direct injection	electronic direct injection

Specification	MT525B
Starter power	4 hp

Specification	MT525B	MT545B	MT555B	MT565B
Oil capacity	15.3 qts	15.3 qts	20 qts	20 qts

Transmission options
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Transmission options	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	continuously variable transmission; 32-speed partial power shift	continuously variable transmission; 32-speed partial power shift

Transmission and speeds
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Transmission	AutoPower IV	AutoPower IV	AutoPower IV	TechStar CVT	TechStar CVT
Type	partial power shift	partial power shift	partial power shift	continuously variable transmission	continuously variable transmission
Gears	32 forward and reverse	32 forward and reverse	32 forward and reverse	infinite forward and reverse (two-range)	infinite forward and reverse (two-range)
Clutch	hydraulic wet disc	hydraulic wet disc	hydraulic wet disc	hydraulic wet disc	hydraulic wet disc
Oil capacity	59.2 qts	59.2 qts	59.2 qts	61.2 qts	61.2 qts

Speeds
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Speeds	With 18.4R38 rear tires	With 18.4R38 rear tires	With 20.8R38 rear tires	50 KPH speeds available with front-axle suspension	50 KPH speeds available with front-axle suspension

Challenger MT525B Tires
Specification	MT525B
Ag front	14L-16.1 (2WD)
Ag rear	18.4R38

Dimensions and weight
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Length	168.5 in	168.5 in	168.5 in	182.3 in	182.3 in
Width	81.1 in	81.1 in	81.1 in	81.1 in	81.1 in
Height (cab)	112.8 in	112.8 in	112.8 in	117.1 in	112.8 in
Clearance (drawbar)	15.4 in	15.4 in	15.4 in	15.4 in	15.4 in
2WD Front tread	64.1 to 83 in / 162 to 210 cm	64.1 to 83 in / 162 to 210 cm	64.1 to 83 in / 162 to 210 cm	64.1 to 83 in / 162 to 210 cm	64.1 to 83 in / 162 to 210 cm
4WD Front tread	61.7 to 80.8 in / 156 to 205 cm	61.7 to 80.8 in / 156 to 205 cm	61.2 to 89.2 in / 155 to 226 cm	61.2 to 89.2 in / 155 to 226 cm	61.2 to 89.2 in / 155 to 226 cm
Rear tread	54.4 to 88.1 in / 138 to 223 cm	60 to 88 in / 152 to 223 cm	55.5 to 91 in / 140 to 231 cm (short bar)	59.2 to 120.5 in / 150 to 306 cm	59.2 to 120.5 in / 150 to 306 cm

Specification	MT525B	MT535B	MT545B
Dimensions	Flange rear axle	Flange rear axle	Flange rear axle Optional

Specification	MT535B	MT545B	MT555B	MT565B
Bar rear axle	3.2 by 82 in / 81 by 2082 mmOptional	3.2 by 82 in / 81 by 2082 mm	3.74 by 118 in / 94 by 2997 mm	3.74 by 118 in / 94 by 2997 mm

Challenger MT525B Weight
Specification	MT525B
2WD Shipping	11,052 lb
4WD Shipping	11,546 lb
CVT 4WD Shipping	13,084 lb
4WD Operating	12,180 lb
CVT 4WD Operating	14,835 lb
Max Drawbar	3,821 lb
2WD Max front axle	4,652 lb
4WD Max front axle	7,054 lb
Max rear axle	12,345 lb

MT535B Serial Numbers
Specification	MT535B
MT535B Serial Numbers	FAQ: How to read a serial number table

Challenger MT535B Tires
Specification	MT535B
Ag front	11.00-16 (2WD)
Ag rear	580/70R38

Challenger MT535B Weight
Specification	MT535B
Shipping	11,052 lb (2WD)
Operating	13,140 lb (2WD)
Max Drawbar	3,821 lb
2WD Max front axle	4,652 lb
4WD Max front axle	7,496 lb
Max rear axle	12,897 lb

MT545B Serial Numbers
Specification	MT545B
MT545B Serial Numbers	FAQ: How to read a serial number table

Challenger MT545B Tires
Specification	MT545B
Ag front	11.00-16 (2WD)
Ag rear	580/70R38

Challenger MT545B Weight
Specification	MT545B
Shipping	11,052 lb (2WD)
Operating	13,140 lb (2WD)
Max Drawbar	3,821 lb
2WD Max front axle	4,652 lb
4WD Max front axle	7,496 lb
Max rear axle	12,897 lb

MT555B Serial Numbers
Specification	MT555B
MT555B Serial Numbers	FAQ: How to read a serial number table

Challenger MT555B Tires
Specification	MT555B
Ag front	420/90R30 (4WD)
Ag rear	520/85R42

Challenger MT555B Weight
Specification	MT555B
Shipping	14,028 lb (2WD)
Ballasted	17,945 lb
Max Drawbar	4,046 lb
2WD Max front axle	5,203 lb
4WD Max front axle	10,141 lb
Max rear axle	16,314 lb

MT565B Serial Numbers
Specification	MT565B
MT565B Serial Numbers	FAQ: How to read a serial number table

Challenger MT565B Tires
Specification	MT565B
Ag front	420/90R30
Ag rear	520/85R42

Challenger MT565B Weight
Specification	MT565B
Shipping	14,028 lb (2WD)
Ballasted	19,645 lb
Max Drawbar	4,046 lb
2WD Max front axle	5,203 lb
4WD Max front axle	10,141 lb
Max rear axle	16,314 lb

Variants — Source comparison annotation
Source guide	Differing-field count reported
MT525B to MT565B	100

Ratios
Figure	MT525B	MT535B	MT545B	MT555B	MT565B
Engine horsepower per 1,000 lb of weight	10.7	12.0	12.9	10.9	12.0
PTO power as a share of engine power	81%	79%	80%	85%	86%
Pump flow per engine horsepower	0.25 gpm	0.22 gpm	0.20 gpm	0.19 gpm	0.17 gpm

Figure	MT535B	MT545B	MT555B	MT565B
Hitch lift as a share of machine weight	85%	85%	105%	105%

Reference directory classification
Equipment group	tractor

MT525B to MT565B: forum references — Forum-title search
Forum index	Equipment class queried	Names in the search	Matching titles
TractorByNet	tractor	Challenger and the MT525, MT535 line that the MT525B, MT535B, MT565B belongs to (no title names the exact model). That is too few titles to say what owners mostly ask about, so the most recent are listed instead	4

Challenger Mt565b Tractor Error Codes Numt2 53 And Numd136 (TractorByNet, 2024-05-28)
Challenger Mt565b Tractor Problem (TractorByNet, 2024-05-27)
9000 Hours On Challenger Mt525 (TractorByNet, 2019-12-13)
Challenger Mt535 Problems (TractorByNet, 2011-10-19)

Used market for the MT525B to MT565B — Dated first-page listing snapshot
Observation date	Listing source	Equipment search	Listings
2026-09-24	TractorHouse	Challenger tractor	15

Model	Listed	Model years	Lowest asking	Highest asking	Median asking	Median hours
MT525B	2	2004 to 2005	$24,816	$35,900	$30,358	8,486
MT535B	2	2004 to 2012	$32,500	$32,500	$32,500	9,820
MT545B	6	2004 to 2013	$59,900	$77,000	$62,634	4,650
MT555B	2	2005 to 2007	$41,000	$134,717	$87,859	None shown
MT565B	3	2004 to 2010	$43,000	$55,900	$49,450	4,902

MT525B to MT565B: recall reference — Dated CPSC search
Search date	Database	Names queried	Search result
2026-09-24	U.S. Consumer Product Safety Commission	Challenger together with the tractor MT525B, MT535B, MT545B, MT555B	No matching recall in this search

Sources for this page
Evidence class	Document, classification and recorded date
Reference site	Reference site: Challenger MT525B — TractorData. Observed 2026-09-24.
Reference site	Reference site: Challenger MT535B — TractorData. Observed 2026-09-24.
Reference site	Reference site: Challenger MT545B — TractorData. Observed 2026-09-24.
Reference site	Reference site: Challenger MT555B — TractorData. Observed 2026-09-24.
Reference site	Reference site: Challenger MT565B — TractorData. Observed 2026-09-24.
Forum threads	Forum threads: TractorByNet thread index for Challenger MT525B to MT565B — TractorByNet. Observed 2026-09-24.
Used-market listings	Used-market listings: TractorHouse listings for Challenger MT525B — TractorHouse. Observed 2026-09-24.
Federal agency data	Federal agency data: Recall database search for Challenger — U.S. Consumer Product Safety Commission. Observed 2026-09-24.

Recorded observations — Forum-title snapshot
Observation field	Recorded value
Title count	4
Forum indexes	TractorByNet
Search wording	the MT525B to MT565B tractor
Latest title quoted by the reference	Challenger Mt565b Tractor Error Codes Numt2 53 And Numd136

Challenger MT525B to MT565B: Configuration records

MT525B

Specification	Source figure
Transmission and speeds
Transmission	AutoPower IV
Gears	32 forward and reverse
Power
PTO (claimed)	95 hp
Drawbar (tested)	81.8 hp
PTO (tested)	110.9 hp
Mechanical
Final drives	inboard planetary
Differential lock	electro-hydraulic front and rear
Trailer brakes	hydraulic Optional
Hydraulics
AutoPower Capacity	18.5 gal
CVT Capacity	26.4 gal
Pressure	2,900 psi
Rear valves	2 to 4
Total flow	29 gpm
Tractor hitch
Rear Type	II/III
AP Rear lift (at 24"/610mm)	8,500 lb
CVT Rear lift (at 24"/610mm)	11,200 lb
Front Hitch	optional
Front lift	5,500 lb
Power take-off (PTO)
Rear PTO	independent
Rear PTO Type	540/1000 (1.375)
Engine RPM	540@1980
Dimensions & Tires
Weight	Lower 11052 lb Upper 14835 lb
Front tire	14L-16.1
Rear tire	18.4R38
Electrical
Ground	negative
Charging system	alternator
Charging amps	120
Batteries	2
Battery CCA	420
Battery volts	12
Engine Detail
Displacement	365.2 cu in
Bore/Stroke	3.937x5.00 in / 100 x 127 mm
Emissions	Tier II
Fuel system	electronic direct injection
Cooling system	viscous fan
Air cleaner	dual paper elements
Compression	17.5:1
Rated RPM	2200
Idle RPM	800-2350
Starter volts	12
Starter power	4 hp
Coolant capacity	29.6 qts
Dimensions and weight
Length	168.5 in
Width	81.1 in
Height (cab)	112.8 in
Clearance (drawbar)	15.4 in
Rear tread	54.4 to 88.1 in / 138 to 223 cm
2WD Front tread	64.1 to 83 in / 162 to 210 cm
4WD Front tread	61.7 to 80.8 in / 156 to 205 cm
Tires
Ag front	14L-16.1 (2WD)
Ag rear	18.4R38
Capacity
Fuel	71 gal
AutoPower Hydraulic system	18.5 gal
CVT Hydraulic system	26.4 gal
Weight
CVT 4WD Shipping	13,084 lb
CVT 4WD Operating	14,835 lb
Max Drawbar	3,821 lb
Max rear axle	12,345 lb
2WD Shipping	11,052 lb
4WD Shipping	11,546 lb
4WD Operating	12,180 lb
2WD Max front axle	4,652 lb
4WD Max front axle	7,054 lb
Additional specifications
Engine	Caterpillar 6.0L 6-cyl diesel
Transmissions	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission
Mechanical	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control
Type	closed center pressure flow compensating (PFC)
MT525B Serial Numbers	FAQ: How to read a serial number table
Power	118 hp
Oil capacity	15.3 qts
Engine Detail	Caterpillar 3056C; turbocharged diesel; 6-cylinder
Transmission options	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission
Clutch	hydraulic wet disc
Speeds	With 18.4R38 rear tires
2WD Wheelbase	112.1 in
4WD Wheelbase	109.5 in

Source

MT535B

Specification	Source figure
Transmission and speeds
Transmission	AutoPower IV
Gears	32 forward and reverse
Power
PTO (claimed)	105 hp
Drawbar (tested)	103.8 hp
PTO (tested)	118.1 hp
Mechanical
Final drives	inboard planetary
Differential lock	electro-hydraulic front and rear
Trailer brakes	hydraulic optional
Hydraulics
Pressure	2,900 psi
Rear valves	2 to 4
Total flow	29 gpm
Tractor hitch
Rear Type	II/III
Front Hitch	optional
Front lift	5,500 lb
Rear lift (at 24"/610mm)	9,391 lb
Power take-off (PTO)
Rear PTO	independent
Rear PTO Type	540/1000 (1.375)
Engine RPM	540@1980
Dimensions & Tires
Weight	Lower 11052 lb Upper 14835 lb
Front tire	11.00-16
Rear tire	580/70R38
Electrical
Ground	negative
Charging system	alternator
Charging amps	120
Batteries	2
Battery CCA	420
Battery volts	12
Engine Detail
Displacement	365.2 cu in
Bore/Stroke	3.937x5.00 in / 100 x 127 mm
Emissions	Tier II
Fuel system	electronic direct injection
Cooling system	viscous fan
Air cleaner	dual paper elements
Compression	17.5:1
Rated RPM	2200
Idle RPM	800-2350
Starter volts	12
Coolant capacity	26.92 qts
Dimensions and weight
Length	168.5 in
Width	81.1 in
Height (cab)	112.8 in
Clearance (drawbar)	15.4 in
Rear tread	60 to 88 in / 152 to 223 cm
2WD Front tread	64.1 to 83 in / 162 to 210 cm
4WD Front tread	61.7 to 80.8 in / 156 to 205 cm
Tires
Ag front	11.00-16 (2WD)
Ag rear	580/70R38
Capacity
Fuel	71 gal
Hydraulic system	18.5 gal (AutoPower)
Weight
Shipping	11,052 lb (2WD)
Operating	13,140 lb (2WD)
Max Drawbar	3,821 lb
Max rear axle	12,897 lb
2WD Max front axle	4,652 lb
4WD Max front axle	7,496 lb
Additional specifications
Engine	Caterpillar 6.0L 6-cyl diesel
Transmissions	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission
Mechanical	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control
Type	closed center pressure flow compensating (PFC)
Capacity	18.5 gal (AutoPower)
Clutch	electro-hydraulic wet disc
Wheelbase	112.1 in
Power	133 hp
Engine Detail	Caterpillar 3056C; turbocharged diesel; 6-cylinder
Transmission options	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission
Oil capacity	59.2 qts
Speeds	With 18.4R38 rear tires
Bar rear axle	3.2 by 82 in / 81 by 2082 mmOptional
MT535B Serial Numbers	FAQ: How to read a serial number table

Source

MT545B

Specification	Source figure
Transmission and speeds
Transmission	AutoPower IV
Gears	32 forward and reverse
Power
PTO (claimed)	115 hp
Drawbar (tested)	100.4 hp
PTO (tested)	125.7 hp
Mechanical
Final drives	inboard planetary
Differential lock	electro-hydraulic front and rear
Trailer brakes	hydraulic Optional
Hydraulics
Pressure	2,900 psi
Rear valves	2 to 4
Total flow	29 gpm
Tractor hitch
Rear Type	II/III
Front Hitch	optional
Front lift	5,500 lb
Rear lift (at 24"/610mm)	9,391 lb
Power take-off (PTO)
Rear PTO	independent
Rear PTO Type	540/1000 (standard)
Engine RPM	540@1980
Dimensions & Tires
Weight	Lower 11052 lb Upper 14835 lb
Front tire	11.00-16
Rear tire	580/70R38
Electrical
Ground	negative
Charging system	alternator
Charging amps	120
Batteries	2
Battery CCA	420
Battery volts	12
Engine Detail
Displacement	365.2 cu in
Bore/Stroke	3.937x5.00 in / 100 x 127 mm
Emissions	Tier II
Cooling system	viscous fan
Air cleaner	dual paper elements
Compression	17.5:1
Rated RPM	2200
Idle RPM	800-2350
Starter volts	12
Coolant capacity	26.92 qts
Dimensions and weight
Length	168.5 in
Width	81.1 in
Height (cab)	112.8 in
Clearance (drawbar)	15.4 in
Rear tread	55.5 to 91 in / 140 to 231 cm (short bar)
2WD Front tread	64.1 to 83 in / 162 to 210 cm
4WD Front tread	61.2 to 89.2 in / 155 to 226 cm
Tires
Ag front	11.00-16 (2WD)
Ag rear	580/70R38
Capacity
Fuel	71 gal
Hydraulic system	18.5 gal (AutoPower)
Weight
Shipping	11,052 lb (2WD)
Operating	13,140 lb (2WD)
Max Drawbar	3,821 lb
Max rear axle	12,897 lb
2WD Max front axle	4,652 lb
4WD Max front axle	7,496 lb
Additional specifications
Engine	Caterpillar 6.0L 6-cyl diesel
Transmissions	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission
Mechanical	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control
Type	closed center pressure flow compensating (PFC)
Capacity	18.5 gal (AutoPower)
Clutch	electro-hydraulic wet disc
Wheelbase	112.1 in
Power	143 hp
Oil capacity	15.3 qts
Engine Detail	Caterpillar 3056C; turbocharged diesel; 6-cylinder
Transmission options	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission
Speeds	With 20.8R38 rear tires
Bar rear axle	3.2 by 82 in / 81 by 2082 mm
MT545B Serial Numbers	FAQ: How to read a serial number table

Source

MT555B

Specification	Source figure
Transmission and speeds
Transmission	TechStar CVT
Gears	infinite forward and reverse (two-range)
Power
PTO (claimed)	130 hp
Drawbar (tested)	116.5 hp
PTO (tested)	141.2 hp
Mechanical
Final drives	inboard planetary
Differential lock	electro-hydraulic front and rear
Trailer brakes	hydraulic Optional
Hydraulics
Pressure	2,900 psi
Total flow	29 gpm
Valves	4
Tractor hitch
Rear Type	II/III
Front Hitch	optional
Rear lift (at 24"/610mm)	14,700 lb
Front lift (at ends)	5,500 lb
Power take-off (PTO)
Rear PTO	independent
Rear PTO Type	540/1000
Engine RPM	540@1890
Dimensions & Tires
Weight	Lower 14028 lb Upper 15060 lb
Front tire	420/90R30
Rear tire	520/85R42
Electrical
Ground	negative
Charging system	alternator
Charging amps	120
Batteries	2
Battery CCA	420
Battery volts	12
Engine Detail
Displacement	365.2 cu in
Bore/Stroke	3.937x5.00 in / 100 x 127 mm
Emissions	Tier II
Cooling system	viscous fan
Air cleaner	dual paper elements
Compression	17.5:1
Rated RPM	2200
Idle RPM	800-2350
Starter volts	12
Coolant capacity	29.6 qts
Dimensions and weight
Length	182.3 in
Width	81.1 in
Height (cab)	117.1 in
Clearance (drawbar)	15.4 in
Rear tread	59.2 to 120.5 in / 150 to 306 cm
2WD Front tread	64.1 to 83 in / 162 to 210 cm
4WD Front tread	61.2 to 89.2 in / 155 to 226 cm
Tires
Ag front	420/90R30 (4WD)
Ag rear	520/85R42
Capacity
Fuel	100 gal
Hydraulic system	18.5 gal (AutoPower)
Weight
Shipping	14,028 lb (2WD)
Ballasted	17,945 lb
Max Drawbar	4,046 lb
Max rear axle	16,314 lb
2WD Max front axle	5,203 lb
4WD Max front axle	10,141 lb
Additional specifications
Engine	Caterpillar 6.0L 6-cyl diesel
Transmissions	continuously variable transmission; 32-speed partial power shift
Mechanical	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control
Type	closed center PFC
Capacity	18.5 gal (AutoPower)
Clutch	electro-hydraulic wet disc
Power	153 hp
Oil capacity	20 qts
Engine Detail	Caterpillar 3056C; turbocharged diesel; 6-cylinder
Transmission options	continuously variable transmission; 32-speed partial power shift
Speeds	50 KPH speeds available with front-axle suspension
Bar rear axle	3.74 by 118 in / 94 by 2997 mm
MT555B Serial Numbers	FAQ: How to read a serial number table
2WD Wheelbase	121.4 in
4WD Wheelbase	118.7 in

Source

MT565B

Specification	Source figure
Transmission and speeds
Transmission	TechStar CVT
Gears	infinite forward and reverse (two-range)
Power
PTO (claimed)	145 hp
Drawbar (tested)	125.0 hp
PTO (tested)	153.1 hp
Mechanical
Final drives	inboard planetary
Differential lock	electro-hydraulic front and rear
Trailer brakes	hydraulic optional
Steering	hydrostatic power
Hydraulics
Pressure	2,900 psi
Total flow	29 gpm
Valves	4
Tractor hitch
Rear Type	II/III
Front Hitch	optional
Rear lift (at 24"/610mm)	14,700 lb
Front lift (at ends)	5,500 lb
Power take-off (PTO)
Rear PTO	independent
Rear PTO Type	540/1000
Engine RPM	540@1890
Dimensions & Tires
Weight	Lower 14028 lb Upper 15060 lb
Front tire	420/90R30
Rear tire	520/85R42
Electrical
Ground	negative
Charging system	alternator
Charging amps	120
Batteries	2
Battery CCA	420
Battery volts	12
Engine Detail
Displacement	365.2 cu in
Bore/Stroke	3.937x5.00 in / 100 x 127 mm
Emissions	Tier II
Cooling system	viscous fan
Air cleaner	dual paper elements
Compression	17.5:1
Rated RPM	2200
Idle RPM	800-2350
Starter volts	12
Coolant capacity	26.92 qts
Dimensions and weight
Length	182.3 in
Width	81.1 in
Height (cab)	112.8 in
Clearance (drawbar)	15.4 in
Rear tread	59.2 to 120.5 in / 150 to 306 cm
2WD Front tread	64.1 to 83 in / 162 to 210 cm
4WD Front tread	61.2 to 89.2 in / 155 to 226 cm
Tires
Ag front	420/90R30
Ag rear	520/85R42
Capacity
Fuel	100 gal
Hydraulic system	18.5 gal (AutoPower)
Weight
Shipping	14,028 lb (2WD)
Ballasted	19,645 lb
Max Drawbar	4,046 lb
Max rear axle	16,314 lb
2WD Max front axle	5,203 lb
4WD Max front axle	10,141 lb
Additional specifications
Engine	Caterpillar 6.0L 6-cyl diesel
Transmissions	continuously variable transmission; 32-speed partial power shift
Mechanical	Two- or four-wheel drive; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control
Type	closed center PFC
Capacity	18.5 gal (AutoPower)
Clutch	electro-hydraulic wet disc
Power	168 hp
Oil capacity	20 qts
Engine Detail	Caterpillar 3056C; turbocharged diesel; 6-cylinder
Transmission options	continuously variable transmission; 32-speed partial power shift
Speeds	50 KPH speeds available with front-axle suspension
Bar rear axle	3.74 by 118 in / 94 by 2997 mm
MT565B Serial Numbers	FAQ: How to read a serial number table
2WD Wheelbase	121.4 in
4WD Wheelbase	118.7 in

Source

Compare Challenger MT525B, MT535B, MT545B, MT555B, MT565B

Engine
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Engine	Caterpillar 6.0L 6-cyl diesel	Caterpillar 6.0L 6-cyl diesel	Caterpillar 6.0L 6-cyl diesel	Caterpillar 6.0L 6-cyl diesel	Caterpillar 6.0L 6-cyl diesel

Transmissions
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Transmissions	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	continuously variable transmission; 32-speed partial power shift	continuously variable transmission; 32-speed partial power shift

Power
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
PTO (claimed)	95 hp	105 hp	115 hp	130 hp	145 hp
Drawbar (tested)	81.8 hp	103.8 hp	100.4 hp	116.5 hp	125.0 hp
PTO (tested)	110.9 hp	118.1 hp	125.7 hp	141.2 hp	153.1 hp

Mechanical
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Final drives	inboard planetary	inboard planetary	inboard planetary	inboard planetary	inboard planetary
Differential lock	electro-hydraulic front and rear	electro-hydraulic front and rear	electro-hydraulic front and rear	electro-hydraulic front and rear	electro-hydraulic front and rear
Trailer brakes	hydraulic Optional	hydraulic optional	hydraulic Optional	hydraulic Optional	hydraulic optional
Mechanical	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control	Two- or four-wheel drive; Power steering; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control	Two- or four-wheel drive; Hydraulic wet disc brakes; Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control

Capacity
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Fuel	71 gal	71 gal	71 gal	100 gal	100 gal

Hydraulics
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Type	closed center pressure flow compensating (PFC)	closed center pressure flow compensating (PFC)	closed center pressure flow compensating (PFC)	closed center PFC	closed center PFC
Pressure	2,900 psi	2,900 psi	2,900 psi	2,900 psi	2,900 psi
Total flow	29 gpm	29 gpm	29 gpm	29 gpm	29 gpm

Tractor hitch
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Rear Type	II/III	II/III	II/III	II/III	II/III
Front Hitch	optional	optional	optional	optional	optional

Power take-off (PTO)
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Rear PTO	independent	independent	independent	independent	independent
Rear PTO Type	540/1000 (1.375)	540/1000 (1.375)	540/1000 (standard)	540/1000	540/1000
Engine RPM	540@1980	540@1980	540@1980	540@1890	540@1890

Dimensions & Tires
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Weight	Lower 11052 lb Upper 14835 lb	Lower 11052 lb Upper 14835 lb	Lower 11052 lb Upper 14835 lb	Lower 14028 lb Upper 15060 lb	Lower 14028 lb Upper 15060 lb
Front tire	14L-16.1	11.00-16	11.00-16	420/90R30	420/90R30
Rear tire	18.4R38	580/70R38	580/70R38	520/85R42	520/85R42

Electrical
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Ground	negative	negative	negative	negative	negative
Charging system	alternator	alternator	alternator	alternator	alternator
Charging amps	120	120	120	120	120
Batteries	2	2	2	2	2
Battery CCA	420	420	420	420	420
Battery volts	12	12	12	12	12

Engine Detail
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Displacement	365.2 cu in	365.2 cu in	365.2 cu in	365.2 cu in	365.2 cu in
Bore/Stroke	3.937x5.00 in / 100 x 127 mm	3.937x5.00 in / 100 x 127 mm	3.937x5.00 in / 100 x 127 mm	3.937x5.00 in / 100 x 127 mm	3.937x5.00 in / 100 x 127 mm
Emissions	Tier II	Tier II	Tier II	Tier II	Tier II
Power	118 hp	133 hp	143 hp	153 hp	168 hp
Cooling system	viscous fan	viscous fan	viscous fan	viscous fan	viscous fan
Air cleaner	dual paper elements	dual paper elements	dual paper elements	dual paper elements	dual paper elements
Compression	17.5:1	17.5:1	17.5:1	17.5:1	17.5:1
Rated RPM	2200	2200	2200	2200	2200
Idle RPM	800-2350	800-2350	800-2350	800-2350	800-2350
Starter volts	12	12	12	12	12
Coolant capacity	29.6 qts	26.92 qts	26.92 qts	29.6 qts	26.92 qts
Engine Detail	Caterpillar 3056C; turbocharged diesel; 6-cylinder	Caterpillar 3056C; turbocharged diesel; 6-cylinder	Caterpillar 3056C; turbocharged diesel; 6-cylinder	Caterpillar 3056C; turbocharged diesel; 6-cylinder	Caterpillar 3056C; turbocharged diesel; 6-cylinder

Transmission options
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Transmission options	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	32-speed partial power shift; 24-speed partial power shift; continuously variable transmission	continuously variable transmission; 32-speed partial power shift	continuously variable transmission; 32-speed partial power shift

Transmission and speeds
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Transmission	AutoPower IV	AutoPower IV	AutoPower IV	TechStar CVT	TechStar CVT
Gears	32 forward and reverse	32 forward and reverse	32 forward and reverse	infinite forward and reverse (two-range)	infinite forward and reverse (two-range)

Speeds
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Speeds	With 18.4R38 rear tires	With 18.4R38 rear tires	With 20.8R38 rear tires	50 KPH speeds available with front-axle suspension	50 KPH speeds available with front-axle suspension

Dimensions and weight
Specification	MT525B	MT535B	MT545B	MT555B	MT565B
Length	168.5 in	168.5 in	168.5 in	182.3 in	182.3 in
Width	81.1 in	81.1 in	81.1 in	81.1 in	81.1 in
Height (cab)	112.8 in	112.8 in	112.8 in	117.1 in	112.8 in
Clearance (drawbar)	15.4 in	15.4 in	15.4 in	15.4 in	15.4 in
2WD Front tread	64.1 to 83 in / 162 to 210 cm	64.1 to 83 in / 162 to 210 cm	64.1 to 83 in / 162 to 210 cm	64.1 to 83 in / 162 to 210 cm	64.1 to 83 in / 162 to 210 cm
4WD Front tread	61.7 to 80.8 in / 156 to 205 cm	61.7 to 80.8 in / 156 to 205 cm	61.2 to 89.2 in / 155 to 226 cm	61.2 to 89.2 in / 155 to 226 cm	61.2 to 89.2 in / 155 to 226 cm
Rear tread	54.4 to 88.1 in / 138 to 223 cm	60 to 88 in / 152 to 223 cm	55.5 to 91 in / 140 to 231 cm (short bar)	59.2 to 120.5 in / 150 to 306 cm	59.2 to 120.5 in / 150 to 306 cm

More in Challenger: MT475E–MT565E, MT455E–MT525E, MT575B–MT685E.

Challenger MT525B to MT565B specifications

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Challenger MT525B to MT565B: Configuration records