C9.3 ACERT™ Tier 4i/Stage IIIB Engine

Cat C9.3 ACERT engines are the ideal solution for your demanding operations in the oilfield. Decades of field operation and intense research and development allow Cat C9.3 ACERT engines to deliver excellent performance with low operating costs and emissions. This is an ideal engine for applications that require Tier 4 Interim or EU Stage IIIB emissions certifications. Equipment powered by C9.3 ACERT engines includes workover rigs, pump skids, acidizing units, cementing units, coil tubing units, and hydraulic power units. Cat engines are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty. Cat® C9.3 ACERT™ Industrial Diesel Engine. Ratings: 224-261 bkW (300-350 bhp) @ 1800-2200 rpm meet U.S. EPA Tier 4 Interim, EU Stage IIIB emission standards. This information about Emissions describes the particular rating’s emissions technology. For more information about emissions certification, please contact your local Cat dealer.

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Minimum Rating 300 BHP
Maximum Rating 350 BHP
Governor and Protection Electronic (ADEM™ A4)
RPM 2200 r/min
Aspiration Turbocharged-Aftercooled
Displacement 567.5 in³
Flywheel and Flywheel Housing SAE 1 or SAE 2
Flywheel Teeth 113 (SAE 1)
Rotation from Flywheel End Counterclockwise
Stroke 5.87 in
Bore 4.53 in
Emissions US EPA Tier 4 Interim, EU Stage IIIB
Length 45.3 in
Width 32.6 in
Height 44.21 in
Weight 1950 lb
Lube Oil System - Refill 31.7 gal (US)
Cooling System 23.5 gal (US)
Air Inlet System
  • Turbocharged Air-to-Air Aftercooled
Control System
  • Electronic control system, over-foam wiring harness, automatic altitude compensation, power compensated for fuel temperature, configurable software features, engine monitoring system SAE J1939 broadcast and control, integrated Electronic Control Unit (ECU) remote fan control
Cooling System
  • Vertical outlet thermostat housing, centrifugal water pump, guidance on cooling system design available to ensure machine reliability
Exhaust System
  • Clean Emissions Module (CEM) that includes Diesel Particulate Filter (DPF), Diesel Oxidation Catalyst (DOC), and Cat Regeneration System, optional exhaust outlet
Flywheels and Flywheel Housing
  • SAE No. 1 and SAE No. 2 flywheel housing
Fuel System
  • High pressure common rail, primary fuel filter, secondary fuel filters, fuel transfer pump, electronic fuel priming
Lube System
  • Open crankcase ventilation system, oil cooler, oil filler, oil filter, oil dipstick, oil pump (gear driven), choice of sumps (front, rear, shallow)
Power Take Off
  • SAE A, SAE B, and SAE C drives available, engine power can also be taken from the front of the engine on some applications
  • Paint: Cat yellow, vibration damper, lifting eyes
Engine-Mounted Transmission Oil Cooler
  • integration with engine cooling system allows ease of installation and a tighter overall engine package
Engine Brakes
  • braking capabilities for mobile applications