C9 ACERT™ Tier 4 Final Petroleum Engine

Well Service Engines C9.3 ACERT™ (Tier 4 Final)

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Key Specs

Maximum Rating
400 BHP
298 bkW
EPA Tier 4 Final and EU Stage IV
EPA Tier 4 Final and EU Stage IV
567.5 in³
9.3 l


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 while meeting tight environmental requirements. This is an ideal engine for applications that require compliance with the highest emission standards in well service applications such as 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. C9.3 ACERT engines with ratings: 224-298 bkW (300-400 bhp) @ 1800-2200 rpm are designed to meet U.S. EPA Tier 4 Final, EU Stage IV 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.

Product Specifications for C9.3 ACERT™ (Tier 4 Final)

Maximum Rating 400 BHP 298 bkW
Displacement 567.5 in³ 9.3 l
Minimum Rating 300 BHP 224 bkW
Aspiration Turbocharged-Aftercooled Turbocharged-Aftercooled
Flywheel and Flywheel Housing SAE 1 or 2 SAE 1 or 2
Flywheel Teeth 113 (SAE 1), 138 (SAE 2) 113 (SAE 1), 138 (SAE 2)
Stroke 5.87 in 149 mm
Bore 4.53 in 115 mm
Emissions EPA Tier 4 Final and EU Stage IV EPA Tier 4 Final and EU Stage IV
Length 44 in 1119 mm
Width 40.4 in 1025 mm
Height 41.9 in 1066 mm
Weight 1950 lb 885 kg

C9.3 ACERT™ (Tier 4 Final) Standard Equipment

Control System

  • Electronic control system, over-foam wiring harness, automatic altitude compensation, power compensated for fuel temperature, remote fan control, configurable software features, engine monitoring system SAE J1939 broadcast and control, integrated Electronic Control Unit (ECU)

Cooling System

  • Cooling package provides additional auxiliary heat load capacity capable of a minimum 10% of engine rated power. See the Web Ambient Tool (https://wbdat.cat. com/) for estimated ambient capability based on rating, fan drive ratio, fan, altitude and auxiliary heat load.

Exhaust System

  • Mid-mount turbocharged system with front and rear exhaust configurations

Flywheels and Flywheel Housing

  • SAE No. 1 and SAE No. 2 flywheel housings; available SAE 1 power take-off housing with optional SAE A, SAE B, and SAE C power take-off drives; engine power can also be taken from the front of the engine with optional attachments

Fuel System

  • Electronic high pressure common rail; primary fuel filter, secondary fuel filters, fuel transfer pump, electronic fuel priming

Lube System

  • Open crankcase ventilation system with fumes disposal (optional OCV filter system); oil cooler, oil filler, oil filter, oil dipstick, oil pump (gear-driven); choice of sumps (front, rear, and center)


  • Paint: Cat yellow

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C9 ACERT™ Tier 4 Final Petroleum Engine

C9 ACERT™ Tier 4 Final Petroleum Engine

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