C9 ACERT™ Standard Equipment

Air Inlet System

  • Turbocharged
  • Air-to-Air Aftercooled

Control System

  • Electronic governing, PTO speed control
  • Programmable ratings
  • Automatic altitude compensation
  • Power compensation for fuel temperature
  • Programmable low and high idle and total engine limit
  • Electronic diagnostics and fault logging
  • Engine monitoring system SAE J1939 broadcast and control
  • ADEM™ A4 Electronic Control Unit (ECU)

Cooling System

  • Thermostats and housing, vertical outlet
  • Jacket water pump, centrifugal
  • Water pump, inlet

Exhaust System

  • Exhaust manifold, dry
  • Optional exhaust outlet

Flywheels and Flywheel Housing

  • SAE No. 1 flywheel housing

Fuel System

  • HEUI™ injection
  • Fuel filter, secondary (2 micron)
  • ACERT™ Technology
  • Fuel transfer pump
  • Fuel priming pump

Lube System

  • Crankcase breather
  • Oil cooler
  • Oil filler
  • Lube oil filter
  • Front sump oil pan
  • Oil dipstick
  • Gear driven oil pump


  • Vibration damper
  • Lifting eyes
  • Cold start capability to -20° C (-4° F)
  • Paint: Caterpillar yellow, with optional colors available at request

Select Units


The Cat® C9 ACERT™ Industrial Power Unit is offered in ratings ranging from 205-261 bkW (275-350 bhp) @ 2200 rpm. These ratings meet China Stage II, U.S. EPA Tier 3 equivalent, or EU Stage IIIA equivalent emission standards. Ratings: 223-261 bkW (300-350 bhp) @ 1800-2200 rpm meet China Stage II, U.S. EPA Tier 2 equivalent, EU Stage II equivalent emission standards. Conveniently pre-configured for a wide range of applications, the Cat® Industrial Power Unit is a complete power package containing a radiator, flywheel, alternator and alternator wiring completely pre-assembled for fast, straightforward installation in a number of OEM, customer and packager applications. These fuel efficient units are ready made for irrigation, industrial, mining and other pump applications.

Power Rating

  • Minimum Rating 275.0 BHP 205.0 bkW
  • Maximum Rating 350.0 BHP 261.0 bkW
  • Rated Speed 1800-2200 rpm 1800-2200 rpm

Emission Standards

  • Emissions China Stage II, U.S. EPA Tier 2 Equivalent or U.S. EPA Tier 3 Equivalent, EU Stage II Equivalent or EU Stage IIIA Equivalent China Stage II, U.S. EPA Tier 2 Equivalent or U.S. EPA Tier 3 Equivalent, EU Stage II Equivalent or EU Stage IIIA Equivalent


  • Engine Configuration Inline 6, 4-Stroke-Cycle Diesel Inline 6, 4-Stroke-Cycle Diesel
  • Bore 112 mm (4.41 in) 112 mm (4.41 in)
  • Stroke 149 mm (5.87 in) 149 mm (5.87 in)
  • Displacement 8.8 L (537 in³) 8.8 L (537 in³)
  • Aspiration Turbocharged Aftercooled (TA) Turbocharged Aftercooled (TA)
  • Compression Ratio 16.3:1 16.3:1
  • Rotation from Flywheel End Counterclockwise Counterclockwise
  • Cooling System - Capacity 44 L (46.5 qt) 44 L (46.5 qt)
  • Lube System - Refill 32 L (33.8 qt) 32 L (33.8 qt)

Power Unit Dimensions - Approximate

  • Height 2008.1 mm (79.06 in) 2008.1 mm (79.06 in)
  • Length 2174.4 mm (85.81 in) 2174.4 mm (85.81 in)
  • Weight - Net Dry - Standard Configuration Without Oil, Cooling, Clutch, Compressor, A/C 1490 kg (3285 lb) 1490 kg (3285 lb)
  • Width 987.8 mm (38.89 in) 987.8 mm (38.89 in)

Reliable, Quiet and Durable Power

World-class manufacturing capability and processes coupled with proven core engine designs assure reliability, quiet operation, and many hours of productive life.

Package Size

Exceptional power density enables standardization across numerous applications. Multiple installation options minimize total package size. Ideal for equipment with narrow engine compartments.

Broad Application Range

Industry leading range of factory configurable ratings and options for agricultural, material handling, construction, mining, aircraft ground support, and other industrial applications.

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

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