AGCO S.A. MT525B

Last Updated: July 2024

Overview

The Challenger MT525B is an agricultural tractor manufactured by AGCO S.A. and powered by a Perkins Diesel U092650K turbocharged engine with 6 vertical cylinders, air-to-air intercooler, and a displacement of 402 cubic inches. It delivers a rated power output of 103.5 HP at 2200 RPM using No. 2 Diesel fuel. This tractor features a continuously variable transmission (CVT) with infinite forward and reverse gears. Key performance figures include a maximum torque of 391.6 lb-ft at 1400 rpm with 58.5% torque rise and 36% torque rise at 1750 rpm. The hydraulic system can exert a maximum force of 12410 lbs with a pump delivery rate of 30.4 GPM, hydraulic power of 36.1 HP, and relief valve pressure of 2900 psi. The operating weight is 15200 lbs. Additional details include electronic direct injection, viscous fan, dual paper air cleaner, front axle lubricant, transmission and hydraulic lubricant specifications, 12-volt starting system, and manufacturer's claimed hitch lift capacity of 10915 lbs. Tire sizes are 14.9R28 (front) and 18.4R38 (rear).
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Key Specifications

Category: Agricultural

Power Output: 103.5

Transmission: Continuously Variable Transmission (CVT)

Drive Type: Two-Wheel Drive, Four-Wheel Drive

Operating Weight: 15200

Fuel Type: No. 2 Diesel

Technical Specifications

Engine

Manufacturer
Perkins Diesel
Model
U092650K
Cooling Type
Liquid-Cooled; Air to air intercooler
Cylinder Orientation
Vertical
Valve Configuration
-
Fuel Type
No. 2 Diesel
Induction Type
Turbocharged
Cylinders
6
Displacement (ci)
402
Bore (in)
4.134
Stroke (in)
5
Rated RPM
2200
Power Output (hp)
103.5

Transmission

Type
Continuously Variable Transmission (CVT)
Forward Gears
Infinite (TechStar CVT)
Reverse Gears
Infinite (TechStar CVT)
Total Gears
-

Dimensions

Length (in)
168.5
Width (in)
81.1
Height (in)
112.8
Operating Weight (lb)
15200

Power Take-Off (PTO)

PTO Type
-
PTO Speed 1 (rpm)
-
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
2WD, 4WD
Drive Type
Two-Wheel Drive, Four-Wheel Drive
Steering Type
-
Coolant Capacity (qts)
29.6
Front Tire Diameter (in)
-
Front Tire Width (in)
-
Rear Tire Diameter (in)
-
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
Front: 14.9R28; Rear: 18.4R38
Manufacture - End Year
-
Hitch Type
II/III
Hitch Category
Category 2/3
Hitch Position
Rear
Hitch Capacity (lb)
-
Operator Station Type
Cab
Starter Type
Electric
Brake Type
Hydraulic Wet Disc
Hydraulic System Type
Closed Center Pressure Flow Compensating (PFC)

Test Results

Nebraska Tractor Test Laboratory - Test Date: September - November, 2007

Maximum Power and Fuel Consumption

  • Rated Engine Speed (PTO speed—1081 rpm):
  • Power: 103.5 HP (77.2 kW) at 2200 rpm

  • Fuel Consumption: 6.85 Gal/hr (25.94 l/h) with a fuel efficiency of 0.470 lb/hp.hr (0.286 kg/kW.h) and 15.11 Hp.hr/gal (2.98 kW.h/l)

  • Standard Power Take-off Speed (1000 rpm):

  • Power: 119.8 HP (89.3 kW) at 2032 rpm

  • Fuel Consumption: 7.12 Gal/hr (26.95 l/h) with a fuel efficiency of 0.423 lb/hp.hr (0.257 kg/kW.h) and 16.83 Hp.hr/gal (3.32 kW.h/l)

  • Maximum Power (1 hour):

  • Power: 121.0 HP (90.2 kW) at 2000 rpm
  • Fuel Consumption: 7.12 Gal/hr (26.94 l/h) with a fuel efficiency of 0.419 lb/hp.hr (0.255 kg/kW.h) and 17.00 Hp.hr/gal (3.35 kW.h/l)

Drawbar Performance

  • Maximum Power—Turtle 8:
  • Power: 79.4 HP (59.2 kW)
  • Drawbar Pull: 5980 lbs (26.6 kN)
  • Speed: 4.98 mph (8.01 km/h)

  • Fuel Consumption: 0.599 lb/hp.hr (0.364 kg/kW.h) with a fuel efficiency of 11.89 Hp.hr/gal (2.34 kW.h/l)

  • 75% of Pull at Maximum Power—Turtle 8:

  • Power: 63.0 HP (47.0 kW)
  • Drawbar Pull: 4540 lbs (20.2 kN)
  • Speed: 5.21 mph (8.38 km/h)

  • Fuel Consumption: 0.665 lb/hp.hr (0.404 kg/kW.h) with a fuel efficiency of 10.71 Hp.hr/gal (2.11 kW.h/l)

  • 50% of Pull at Maximum Power—Turtle 8:

  • Power: 43.2 HP (32.2 kW)
  • Drawbar Pull: 3055 lbs (13.6 kN)
  • Speed: 5.30 mph (8.53 km/h)
  • Fuel Consumption: 0.796 lb/hp.hr (0.484 kg/kW.h) with a fuel efficiency of 8.94 Hp.hr/gal (1.76 kW.h/l)

Torque and Engine Performance

  • Maximum Torque: 391.6 lb.-ft. (530.9 Nm) at 1400 rpm
  • Torque Rise: 58.5%
  • Torque Rise at 1750 rpm: 36%

Hydraulic Performance

  • Maximum Force Exerted: 12410 lbs (55.2 kN) at hitch points
  • Pump Delivery Rate: 30.4 GPM (115.2 l/min) at minimum pressure
  • Hydraulic Power: 36.1 HP (26.9 kW) at a delivery pressure of 2395 psi (165 bar)



Nebraska Tractor Test Lab, "Nebraska Summary: S644 Challenger MT525B" (2007). Nebraska Tractor Tests. 2902. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2902

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