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Caterpillar

Cat C18 Auxiliary/Generator Set Engine (IMO II)

C18 auxiliary/generator set engines incorporate a separate circuit aftercooling system (SCAC) for all configurations. The primary advantage of the SCAC systsem is reduced aftercooler corrosion since no sea water circulates through the aftercooler. Many other improvements on these engines also contribute to minimizing owning and operating costs. The IMO II compliant ratings are available with heat exchanger or keel cooled options. All major MCS type approvals are available from the factory.

Media

Photos

C18 IMO II
C18 IMO II

Documents

Features

SEPARATE CIRCUIT AFTERCOOLING SYSTEM

EMISSIONS

COOLING SYSTEM

TURBO CONFIGURATIONS

MARINE CERTIFICATIONS

Details

Specifications

Spec Value
Power Range 404 - 660 404 - 660
Minimum Rating 404 BHP 301 bkW
Maximum Rating 660 BHP 492 bkW
Spec Value
Aspiration TA, TTA TA, TTA
Rotation from Flywheel End Counterclockwise Counterclockwise
Bore 5.7 in 145 mm
Displacement 1106 in³ 18.1 l
Configuration In-Line 6, 4-Stroke-Cycle Diesel In-Line 6, 4-Stroke-Cycle Diesel
Stroke 7.2 in 183 mm
Spec Value
Height 51.2 in 1300 mm
Length 73 in 1854 mm
Width 44.6 in 1134 mm
Dry Weight 1950 lb 4299 kg

Standard Equipment

AIR INLET SYSTEM

  • Separate circuit after-cooled (SCAC)
  • Open Crankcase Ventilation (OCV) system
  • Turbocharger, jacket water cooled
  • Turbocharger inlet, 152 mm (6 in) OD straight connection

CONTROL SYSTEM

  • Programmable low idle
  • Electronic diagnostics and fault logging
  • Electronic fuel/air ratio control
  • Engine Protection Mode for extended ambient conditions – EPA Tier 3 Ratings Only
  • 70-pin customer connector
  • Three types of throttle inputs (primary/ secondary PWM, 0-5V, 4-20mA

COOLING SYSTEM

  • Separate Circuit After-Cooling (SCAC) for both HEX and Keel cooled engines
  • Engine JW and SCAC Shell & Tube Heat Exchangers for HEX cooled engines
  • SCAC pump, gear driven, for HEX cooled engines only
  • Jacket water pump, gear driven
  • Auxiliary water pump, gear driven
  • Sea water pump, bronze impeller, gear driven
  • SCAC and JW shunt tanks for maintaining proper pump inlet pressures

EXHAUST SYSTEM

  • 152 mm (6 in) round flanged outlet
  • Water-cooled exhaust manifold & turbocharger

FLYWHEELS & FLYWHEEL HOUSINGS

  • Flywheel Housing, SAE No. 0
  • Flywheel, 18 inch, 136 teeth
  • SAE standard rotation

FUEL SYSTEM

  • Front service simplex fuel system
  • Fuel transfer pump, gear driven
  • Manual fuel priming pump
  • Hybrid fuel line design

LUBE SYSTEM

  • Front service simplex oil system
  • Center sump oil pan:
  • Front and top service oil filler locations
  • Front service dipstick
  • Oil pump, gear driven

MOUNTING SYSTEM

  • Front support – adjustable

POWER TAKE-OFFS

  • Hydraulic Pump Drive
  • Crankshaft Pulleys
  • Front Stub Shaft
  • Front Enclosed Clutch

GENERAL

  • Front damper guard
  • Front service engine
  • Common electrical bonding point
  • Engine does not ship with zinc components
  • NOTE: These engines are for constant speed generator set applications only, and NOT to be used for variable speed applications

Optional Equipment

EXHAUST SYSTEM

  • Dry Elbows
  • Water-Cooled Elbows
  • Flexible Fitting
  • Flange
  • Muffler
  • Muffler Spark Arresting

AIR INLET SYSTEM

  • Air Inlet Adapter

CHARGING SYSTEM

  • Battery Chargers
  • Charging Alternators
  • Alternator Mounting Group
  • Ammeter

CONTROL SYSTEM

  • MECP I – Marine Engine Control Panel
  • Caterpillar Alarm and Protection
  • Load Sharing Attachment

COOLING SYSTEM

  • Aux Expansion Tank Flange Kit

FUEL SYSTEM

  • Duplex Fuel Filters
  • Fuel Cooler
  • Primary Fuel Filters
  • Flexible Fuel Lines

INSTRUMENTATION

  • Instrument Panels
  • OEM Wiring Harness
  • Gauges
  • Oil Level Sensor

LUBE SYSTEM

  • Duplex Oil Filters
  • Sump Pump

POWER TAKE-OFFS

  • Crankshaft Pulleys
  • Front Stub Shaft
  • Hydraulic Pump Drive Adapter
  • Front Enclosed Clutch

PROTECTION SYSTEM

  • Marine Classification Society and SOLAS

STARTING SYSTEM

  • Electric Starting Motors – Single 24 Volt
  • Air Starting Motor
  • Air Start Accessories
  • Starting Aids – JW Heaters
  • Battery Sets – 24 Volt – Dry

MOUNTING SYSTEM

  • Front Support
  • REAR ENGINE SUPPORT

PACKING

  • Engine Protective Cover
  • Storage Preservation
  • Export Packing

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