Cat® C15 Diesel Engine

The Cat® C15 Industrial Diesel Engine is offered in ratings ranging from 354-433 bkW (475-580 bhp) @ 1800-2100 rpm. Industries and applications powered by C15 engines include: Agriculture, Ag Tractors, Aircraft Ground Support, Bore/Drill Rigs, Chippers/Grinders, Combines/Harvesters, Compactors/Rollers, Compressors, Construction, Cranes, Crushers, Dredgers, Forestry, General Industrial, Hydraulic Power Units, Irrigation Equipment, Loaders/Forwarders, Material Handling, Mining, Mobile Earthmoving Equipment, Paving Equipment, Pumps, Shovels/Draglines, Surface Hauling Equipment and Trenchers.


The Cat C15 offers a fully-configurable engine across a wide range of power nodes, flexible aftertreatment mounting options and the ability to install the engine's IPU straight from the factory, so OEMs can keep installation time and costs to a minimum.

Advanced Features

With transparent regeneration technology built into every Cat C15, operators can continue to be productive without ever having to wait. The C15 also features a 5,000-hour DPF service interval and DEF capacity of 93.7 liters, giving machine operators the opportunity to spend more time on the job site and less time in the shop.

Ideal Applications

Industrial, agricultural and construction applications such as: Compressors • Trenchers • Chippers • Grinders • Irrigation equipment • Bore rigs • Drill rigs • Pumps • Hydraulic power units

Total Cost of Ownership

Operators know the true costs of owning an engine goes beyond the rough and reliable exterior. That's why the Cat C15 was developed to optimize fluid consumption based on a wide range of operating cycles and applications. And with 500-hour maintenance intervals, owners can keep parts and service costs low.

Cat Dealer Product Support

Say goodbye to complicated service routines and start enjoying scheduled maintenance and worldwide dealer support with the Cat C15. Not only does the engine come with a warranty, it’s also backed by the Cat dealer support network across 192 countries. See your Cat dealer for details.


Each Cat C15 features a clean emissions module that uses DOC, DPF and SCR technologies to keep the engine running cleaner, longer. Besides, cleaner air isn't just good for the engine, it's also a win for the environment and makes for safer working conditions.

Standard Equipment

Air Inlet System
  • Turbocharged
  • Air-to-Air Aftercooled
  • Mid-mount turbocharged system with front and rear exhaust configurations (Tier 4 Final, Stage IV)
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
  • Integrated Electronic Control Unit (ECU)
  • Remote fan control
Cooling System
  • Thermostats and housing, vertical outlet
  • Centrifugal water pump
  • Guidance on cooling system design available through your dealer to ensure equipment reliability
Flywheels and Flywheel Housing
  • Choice of SAE No. 0 or SAE No. 1 flywheel housing
  • Available SAE No. 1 power take off with optional SAE A, SAE B or SAE C power take off drives. Engine power can also be taken from the front of the engine with optional attachments. (Tier 4 Final, Stage IV).
Fuel System
  • MEUI injection
  • Primary fuel filter
  • Secondary fuel filters
  • Fuel transfer pump
  • Electronic fuel priming
Lube System
  • Open crankcase ventilation system
  • Oil cooler
  • Oil filler
  • Lube oil filter
  • Oil dipstick
  • Gear driven oil pump
  • Choice of front, rear or center sumps
  • Open crankcase ventilation system with fumes disposal (optional OCV filter system) (Tier 4 Final, Stage IV)
Power Take Off (PTO)
  • SAE A, SAE B or SAE C power take off (PTO) drives. Engine power can also be taken from the front of the engine on some applications.
  • Paint: Caterpillar yellow, with optional colors available at request
U.S. EPA Tier 4 Interim, EU Stage IIIB Aftertreatment / Clean Emissions Control Equipment
  • Cat Regeneration System
  • Clean Emissions Module (CEM), consisting of Diesel Particulate Filter (DPF) and Diesel Oxidation Catalyst (DOC)
  • NOx Reduction System (NRS)
  • Flex pipe connection kit with 90° rotatable elbows to attach to Cat Regeneration System Inlet
  • Available in 12 volt or 24 volt systems
U.S. EPA Tier 4 Final, EU Stage IV Aftertreatment
  • Cat Regeneration System
  • Clean Emissions Module (CEM), consisting of Diesel Particulate Filter (DPF) and Diesel Oxidation Catalyst (DOC)
  • Aftertreatment Electronic Control Unit (ECU)
  • NOx Reduction System (NRS)
  • Pump Electronic Control Unit (PETU)
  • Selective Catalytic Reduction (SCR)
  • Available in 12V or 24V systems

Additional information

Offering Type

Power Rating - Maximum Power

433 kW ( 580 HP )

Power Rating - Maximum Torque

2655 Nm @ 1400 rpm ( 1958 lb-ft @ 1400 rpm )

Power Rating - Rated Speed

1800-2100 rpm

Power Rating - Minimum Power

354 kW ( 475 HP )

Emission Standards - Emissions

U.S. EPA Tier 4 Final

General - Engine Configuration

In-Line 6

General - Bore

137 mm ( 5.4 in )

General - Stroke

171 mm ( 6.7 in )

General - Displacement

15.2 l ( 927.6 in³ )

General - Compression Ratio


General - Aspiration

Turbocharged-Aftercooled (TA)

General - Combustion System

Direct Injection

General - Rotation from Flywheel End


General - Aftertreatment


Engine Dimensions - Approximate - Length

1438 mm ( 56.6 in )

Engine Dimensions - Approximate - Width

969 mm ( 38.1 in )

Engine Dimensions - Approximate - Height

1248 mm ( 49.1 in )

Engine Dimensions - Approximate - Weight - Net Dry - Basic Operating Engine Without Optional Attachments

1666 kg ( 3673 lb )

Aftertreatment Dimensions - Length

1153 mm ( 45.4 in )

Aftertreatment Dimensions - Width

1112 mm ( 43.8 in )

Aftertreatment Dimensions - Height

654 mm ( 25.7 in )

Aftertreatment Dimensions* - Diameter

356 mm ( 14 in )

Aftertreatment Dimensions - Weight

272 kg ( 600 lb )

PETU Dimensions - Tier 4 Final Only - Length

854 mm ( 33.6 in )

PETU Dimensions - Tier 4 Final Only - Width

287 mm ( 11.3 in )

PETU Dimensions - Tier 4 Final Only - Height

551 mm ( 21.7 in )

PETU Dimensions - Tier 4 Final Only - Weight

19.4 kg ( 42.8 lb )

PETU Dimensions - Tier 4 Final Only - Volume Capacity

48.4 l ( 51.1 qt (US) )

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