Well Service Engines

C9 ACERT™ Hazardous Location Engine

Maximum Rating

340 BHP


EPA and CARB Non-Road Tier 3, EU Stage IIIA, EPA Marine Tier 2, IMO Tier II


537.96 in³


Cat C9 ACERT hazardous location engines are the ideal solution for specialized and demanding operations in the oilfield. Engines are hazardous-location certified from the factory to minimize installation design, time, and cost. Decades of field operation and intense research and development allow Cat C9 ACERT hazardous location engines to deliver excellent performance with low operating costs and emissions.Hazardous location engines are certified to operate in potentially explosive environments. Applications powered by C9 ACERT engines include 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 ACERT hazardous location engines, with ratings 254 bkW (340 bhp) @ 2200 rpm meet IMO Tier II, EPA Non-road Tier 3 equivalent and EU Stage IIIA equivalent emission standards. They are available using U.S. EPA and EU Flexibility, and for other regulated and non-regulated areas.

    Capacity for Liquids

    Lube Oil System - Refill

    gal (US)

    Cooling System

    3.7 gal (US)



    44.4 in


    35.1 in


    42.6 in


    2,219 lb



    EPA and CARB Non-Road Tier 3, EU Stage IIIA, EPA Marine Tier 2, IMO Tier II

    General Specifications

    Maximum Rating

    340 BHP


    537.96 in³

    Minimum Rating

    340 BHP

    Governor and Protection

    Electronic (ADEM™ A4)


    2,200 r/min



    Flywheel and Flywheel Housing

    SAE 1 or 2

    Flywheel Teeth

    113 (SAE 1), 134 (SAE 2)

    Rotation from Flywheel End



    5.9 in


    4.4 in

    • Air Inlet System
      • Turbocharger, separate circuit (SCAC) or remote (REMAC) aftercooler
      • Single, right-side, center-mounted turbo with water-cooled turbine housing
      • Air inlet 101.6 mm (4 in) connection type
    • Control System
      • Electronic governing, PTO speed control
      • Programmable ratings
      • Cold mode start strategy
      • Automatic altitude compensation
      • Fuel cooled ECU
      • Power compensation for fuel temperature
      • Programmable low and high idle
      • Electronic diagnostics and fault logging
      • Programmable monitoring system (engine speed, temperature, pressure)
      • J1939 broadcast (diagnostic and engine status)
      • Certified electrical control system (hazardous environment only)
      • Derated engine: automatic ambient temperature compensation
    • Cooling System
      • Thermostats and housing, RH forward-facing outlet — 51 mm (2.01 in) connection
      • Jacket water pump — belt-driven, centrifugal
      • Water pump — inlet RH facing downward 63 mm (2.48 in)
    • Exhaust System
      • Exhaust manifold — wet
      • Single, right-side, center-mounted turbo with water-cooled turbine housing
      • Rear facing turbo exhaust 81.8 mm (3.22 in.) connection, non V-band clamp
    • Flywheels and Flywheel Housing
      • Mandatory selection of:SAE No. 1 or SAE No. 2 flywheel and housing, SAE standard rotation
    • Fuel System
      • HEUI fuel system
      • Fuel filter — secondary, LH (2-micron high performance)
      • Fuel transfer pump — left front
      • Fuel priming pump — left front
    • Lube System
      • Crankcase breather — LH
      • Crankcase fumes disposal — with integrated service indicator, LH
      • Oil cooler — RH
      • Oil filter — RH
      • Oil pan — front sump
      • Oil filler — top mounted
      • Oil level gauge — LH side
      • Oil pump — gear-driven
      • Oil valve sampling
      • Preservation of turbocharger, flywheel, and crankcase
    • Power Take-Offs
      • Crankshaft drive pulley — 2 grooves, 190 mm (7.5 in) diameter, 22.3 mm (7/8 in) wide
    • General
      • Vibration damper
      • Lifting eyes
      • Automatic variable timing — electronic
      • Literature
    • Mandatory Options
      • Flywheel housing and flywheel
      • Primary filter/water separator
      • Turbo orientation

    • Air Inlet System
      • Air inlet elbow
      • Air shutoffs
    • Cooling System
      • Water outlet elbow
      • Coolant conditioner
    • Flywheels and Flywheel Housing
      • Crankshaft seal
    • Instrumentation
      • Gauges and instrument panels
      • Interconnect harness
    • Lube System
      • Oil pans
      • Drain and cover
      • Remote oil filters
      • Lubricating oils
    • Mounting System
      • Structural steel base
      • Engine support — front and rear
    • Power Take-Offs
      • Rear enclosed clutches
      • Hydraulic pump drives
      • Hydraulic gear pumps
      • Clutch supports
      • Crankshaft pulleys
      • Transmission Arrangement
      • General

    Similar Models


    • Machines built tough and ready to run in rugged applications

    • Trusted advisors to help you find and maximize your equipment

    • Wide inventory of rental equipment that lets you try before you buy

    • Full service and support to ensure performance and longevity