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.

General Specifications
Minimum Rating 340 BHP
Maximum Rating 340 BHP
Governor and Protection Electronic (ADEM™ A4)
RPM 2200 r/min
Aspiration Turbocharged-Aftercooled
Displacement 537.96 in³
Flywheel and Flywheel Housing SAE 1 or 2
Flywheel Teeth 113 (SAE 1), 134 (SAE 2)
Rotation from Flywheel End Counterclockwise
Stroke 5.9 in
Bore 4.4 in

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

Length 44.4 in
Width 35.1 in
Height 42.6 in
Weight 2219 lb

Capacity for Liquids
Lube Oil System - Refill 8 gal (US)
Cooling System 3.7 gal (US)

Engine Design

- Proven reliability and durability - 45°C ambient capability*- Robust diesel strength design prolongs life and lowers owning an operating costs- Broad operating speed range- PTO drive options provide flexible access to auxiliary power for pumps and other needs

Cat® Hazardous Location Engine

Cat Petroleum Hazardous Location Engines are third-party certified from Caterpillar- Class I Division 2 (NEC 500), - Class I Zone 2 (NEC 505), and - ATEX Directive (94/9/EC) Group II, 3G environments (Zone 2) with Gas Group IIA, Electrical IIC, and Temperature Class T3


- Electrical harness containing point-to-point wiring without splices in any power/signal wires- Electrical harnesses and connectors are overmolded and are routed through urethane tube for protection against impact and vertical flame propagation.- To meet safety requirements, connectors require the use of a special tool to be disconnected and bear the “do not disconnect while energized” warning.- Optional ATEX and NEC certified 25-foot customer harness- ECU is certified as part of the engine to restricted breathing per EN 60079-15. ECU is protected with a stainless steel guard.- Fuel injector connections at valve cover bases are protected with stainless steel guards

Advanced Digital Engine Management

ADEM A4 engine management system integrates speed control, air/fuel ratio control and ignition/detonation controls into a complete engine management system. control system with integrated digital ignition, engine protection and monitoring

Air System

- Remote aftercooler (REMAC, air-to-air) and separate circuit (water-to-air) aftercooler options available to match any application requirement.- Water-cooled exhaust manifold and turbo maintain ATEXcompliant skin temperature during operation- Air Inlet shut-off enables emergency shut-off for operator safety

Improved Serviceability

- Front, right and rear dipsticks- Remote oil and fuel filters- 12V and 24V electronic systems to improve application flexibility


The full line of Cat engine/transmission packages can be fully integrated with your axle, hydraulics, and operator interface. Cat transmissions deliver continuous operation under full load, smooth shifting at any speed, and maximum up time, with unmatched durability and easy maintenance.

Custom Packaging

Trust a Cat factory custom package to meet your exact petroleum application needs. Cat engines, generators, enclosures, controls, radiators, transmissions — anything your project requires — can be custom designed and matched to create a one-of-a kind solution. Custom packages are globally supported and are covered by a one-year warranty after startup.

Full Range of Attachments

Large variety of factory installed engine attachments reduces packaging time


Every engine is full-load tested to ensure proper engine performance

Product Support Offered Through Global Cat Dealer Network

- More than 2,200 dealer outlets- Cat factory-trained dealer technicians service every aspect of your petroleum engine- Cat parts and labor warranty- Preventive maintenance agreements available for repair-before failure options- S•O•SSM program matches your oil and coolant samples against Caterpillar set standards

Over 80 Years of Engine Manufacturing Experience

Ownership of these manufacturing processes enables Caterpillar to produce high quality, dependable products.- Cast engine blocks, heads, cylinder liners, and flywheel housings- Machine critical components- Assemble complete engine

Web Site

For all your petroleum power requirements, visit www.catoilandgasinfo.com

Standard Equipment

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
  • Vibration damper
  • Lifting eyes
  • Automatic variable timing — electronic
  • Literature
Mandatory Options
  • Flywheel housing and flywheel
  • Primary filter/water separator
  • Turbo orientation

Optional Equipment

Air Inlet System
  • Air inlet elbow
  • Air shutoffs
Cooling System
  • Water outlet elbow
  • Coolant conditioner
Flywheels and Flywheel Housing
  • Crankshaft seal
  • 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

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