Cat® C27 ACERT™ Diesel Engine

Cat® C27 ACERT™ Diesel Engine

The Cat® C27 ACERT™ Industrial Diesel Engine is offered in ratings ranging from 597-783 bkW (800-1050 bhp) @ 1800 rpm. These ratings meet U.S. EPA Tier 4 Final emission standards. Industries and applications powered by C27 ACERT engines include: Bore/Drill Rigs, Chippers/Grinders, Construction, Cranes, Dredgers, Forestry, Hydraulic Power Units, Irrigation Equipment, Material Handling, Mobile Earthmoving Equipment, Paving Equipment, Pumps, Shovels/Draglines, Surface Hauling Equipment and Trenchers. Specifications are for configurations with side-mounted turbos. Configurations are also available with rear-mounted turbos for 652 bkW (875 bhp) and 708 bkW (950 bhp) ratings.

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Power Rating

Minimum Power
Maximum Power
Rated Speed
1800 rpm

Emission Standards

U.S. EPA Tier 4 Final


Engine Configuration
V-12, 4-Stroke-Cycle Diesel
137.2 mm (5.4 in)
152.4 mm (6 in)
27 L (1649.5 in³)
Twin Turbocharged-Aftercooled (TTA)
Compression Ratio
Combustion System
Direct Injection
Rotation (from flywheel end)
Cooling System Capacity
67.9 L (71.7 qt)
Lube System (refill)
68 L (71.9 qt)

Engine Dimensions (Approximate. Final dimensions dependent on selected options)

1874 mm (73.8 in)
1600 mm (63 in)
1370 mm (53.9 in)
Weight - Net Dry (Basic Operating Engine Without Optional Attachments)
3004 kg (6625 lb)

Standard Equipment

  • 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
  • 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
    • Choice of SAE No. 0 or SAE No. 1 flywheel housing
  • Fuel System
    • MEUI injection
    • Fuel filter, secondary (2 micron)
    • Fuel transfer pump
    • Electronic fuel priming
  • Lube System
    • Open crankcase ventilation system
    • Oil cooler
    • Oil filler
    • Lube oil filter
    • Rear sump oil pan
    • Oil dipstick
    • Gear driven oil pump
  • Power Take Off
  • General
    • Paint: Caterpillar yellow, with optional colors available at request
    • Vibration damper
    • Lifting eyes