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The Cat® C9.3B Industrial Diesel Engine is offered in ratings ranging from 230-310 bkW (308-416 bhp) @ 1800-2200 rpm. These ratings meet China Nonroad Stage III, Brazil MAR-1, and UN R96 Stage IIIA emission standards. The C9.3B engines are ideal choices to power applications in agriculture, aircraft ground support, construction, forestry, general industrial, material handling, and mining.

Power Rating

Minimum Power 308.0 HP 230.0 kW Less
Maximum Power 416.0 HP 310.0 kW Less
Rated Speed 1800-2200 rpm 1800-2200 rpm Less

Emission Standards

Emissions China Nonroad III, Brazil MAR-1 and and UN R96 Stage IIIA emission standards. China Nonroad III, Brazil MAR-1 and and UN R96 Stage IIIA emission standards. Less


Engine Configuration Inline 6, 4-Stroke-Cycle Diesel Inline 6, 4-Stroke-Cycle Diesel Less
Bore 115 mm (4.53 in) 115 mm (4.53 in) Less
Stroke 149 mm (5.87 in) 149 mm (5.87 in) Less
Displacement 9.3 L (567.5 in³) 9.3 L (567.5 in³) Less
Aspiration Turbocharged Aftercooled (TA) Turbocharged Aftercooled (TA) Less
Compression Ratio 16.5:1 16.5:1 Less
Combustion System Direct Injection Direct Injection Less
Rotation from Flywheel End Counterclockwise Counterclockwise Less

Engine Dimensions - Approximate

Length 1125 mm (44.3 in) 1125 mm (44.3 in) Less
Width 791 mm (31.1 in) 791 mm (31.1 in) Less
Height 1068 mm (42 in) 1068 mm (42 in) Less
Weight - Net Dry - Basic Operating Engine Without Optional Attachments 865 kg (1907 lb) 865 kg (1907 lb) Less

High Performance

The C9.3B delivers expanded capability with 19% more power and 16% more torque than the previous 8.8 liter platform for less regulated countries (comparison for IND-C rating).

Reliable, Quiet and Durable Power

The C9.3B engine leverages a core engine with over 200 million off-highway hours in the field and is manufactured in a world-class facility; assuring reliability, quiet operation and many hours of productive life.

Optimized Installation

  • The C9.3B for LRC offers platform commonality with the C9.3B for highly  regulated countries to reduce cost of installation and support a global customer base by sharing a common core engine, offering similar machine interfaces and controls architecture.
  • High power density, up to 33.3 kW/L (44.7 hp/L) gives original equipment manufacturers (OEMs)
        the ability to downsize their engine installation without sacrificing performance.
  • Fully configurable engine options and industrial power unit (IPU)  available from factory to avoid 
        significant design, validation, and manufacturing costs.

Low Cost Maintenance

  • Worldwide service delivers ease of maintenance and simplifies the servicing routine.
  • Standard service intervals of 500 hours under normal operating conditions.
  • The S•O•SSM program is available from your Cat dealer to optimize oil change intervals.
  • Ideal for high-hour applications over 10,000 hours.     
    • Remote mount options for serviceable items such as oil and fuel filters.

Low Operating Costs

C9.3B development and calibration strategies  have yielded significant improvements in fuel 
consumption, minimizing the total cost of ownership.

World-class Product Support Offered Through Global Cat Dealer Network

  • Scheduled maintenance, including SOSSM sample
  • Customer Support Agreements (CSA)
  • Caterpillar Extended Service Coverage (ESC)
  • Superior dealer service network
  • Extended dealer service network through the Cat Industrial Service Distributor (ISD) program

C9.3B Standard Equipment

Air Inlet System
  • Turbocharged: system with front and rear exhaust configurations
  • Air-to-Air Aftercooled

Control System
  • Configurable software features
  • Engine monitoring system SAE J1939 broadcast and control
  • Electronic control system with single on-engine ECM
  • Over-foam wiring harness
  • Automatic altitude compensation

Cooling System
  • Centrifugal water pump
  • Guidance on cooling system design available through your dealer to ensure equipment reliability

Flywheels and Flywheel Housing
  • Available SAE No. 1 and No. 2 flywheel/housings

Fuel System
  • Electronic high pressure common rail
  • Primary fuel filter
  • Secondary and tertiary fuel filters
  • Fuel transfer pump
  • Electronic fuel priming

Lube System
  • Open crankcase ventilation system (OCV) with fumes disposal (optional OCV filter system)
  • Oil cooler
  • Oil filler
  • Lube oil filter
  • Choice of front, rear or center sumps
  • Oil dipstick
  • Gear driven oil pump

  • Vibration damper
  • Lifting eyes
  • Paint: Caterpillar yellow, with optional colors available at request