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Whether you are mining copper in the Andes or oil sand in Alberta, the Cummins QSK78 provides the optimal combination of productivity and performance in the world's largest class of haul trucks.  Its 3500-horsepower (2610 kW) V18 configuration incorporates the best features of our QSK Series engines, including advanced combustion technology and robust base engine components.

Electronically programmable parameters let you customize engine performance to match the equipment, the environment, and operator requirements.  Plus, the QSK78 comes with standard features like ELIMINATORTM, CENTINELTM, and Prelub™, which help eliminate downtime for routine maintenance, and lengthen life-to-overhaul.  Put that together with exceptional fuel efficiency, and you have the lowest cost-per-ton of any engine in its class.

Every QSK78 engine is covered by Cummins base warranty, one of the most comprehensive and simplest plans in the industry.

View a printable file of the QSK78 brochure.

 
Engine ModelAdvertised hp (kW) @ rpmPeak Torque lb-ft (N•m) @ rpm
QSK78-35003500 (2610) @ 190010157 (13771) @ 1500
Engine Type60o Vee, 18-Cylinder
Displacement4735 cu in78 liters
Advertised Horsepower3500 hp2610 kW
Peak Torque10157 lb-ft @ 1500 rpm13771 N•m
Bore and Stroke6.69 in x 7.48 in170 mm x 190 mm
AspirationTwo-Stage Turbocharged,
Intercooled and Aftercooled
Oil System Capacity304 U.S. qt288 liters
Coolant Capacity*236 U.S. qt224 liters
Length131 in3327 mm
Width65.5 in1663 mm
Height95.6 in2429 mm
Weight (Wet) 24912 lb11300 kg

* Engine only

 
  • One-Piece Cast-Iron Block - designed to absorb dynamic internal forces.  Wide cylinder spacing allows for multiple full-life overhauls.
  • Heavy-Duty Front Gear Train - A modification of the proven QSK60 design that has low gear loading and high fatigue strength for dependable service.
  • Forged High-Strength Tensile Steel Crankshaft - Combined with dual viscous dampers reduces gear train wear.  Tungsten counterwieghts provide vibration damping for long engine and equipment life.
  • Quantum System Electronics - High-speed Electronic Control Module (ECM) with a self-cooling mount is isolated from detrimental vibration loading. A field-proven, fully-sealed wiring harness with fail-safe connectors integrates the ECM with the engine sensors for optimized engine performance, monitoring and protection.  Quantum system technology is ideal for tough mining applications that demand continuous uptime carrying hundreds of tons capacity.
  • High-Pressure Injection (HPI) Fuel System - Provides a high-peak injection pressure for optimum combustion for low emissions and better fuel economy.  HPI fuel injection provides a “soft” injection start for lower combustion noise.  Other benefits include excellent cold-starting characteristics and improved transient response at all engine speeds.
  • Two-stage Holset® Turbocharging from Cummins Turbo Technologies - Delivers full power and exceptional fuel efficiency at up to an industry-leading 16,400 ft (5,000 meters) altitude without derate.
  • Wiring - Safely enclosed inside a foam-filled extruded aluminum channel and is completely sealed from the external environment to prevent chafing and corrosion damage.  DIN-style connections have a locking feature that protects against pin-fretting damage.
  • Prelub™ System - Distributes oil to rifles and friction surfaces and builds oil pressure before cranking can occur, reducing engine wear and greatly extending life-to-rebuild.
  • CENSE™ - Provides continuous monitoring of engine performance, cylinder-by-cylinder.  Fault codes are logged and reported with operational data for quick and accurate diagnosis and repair.
  • Premium Fan Drive – Incorporates large matched and sealed bearings, improved oil seals, and an improved idler system.  The fan drives have fixed fan centers with tensioning provided by a manually adjusted and maintenance free idler.  The fan drive is available with or without an electronically controlled oil-actuated fan clutch.
  • CENTINEL™ Continuous Oil Replacement System - Extends oil drain and extends oil filter life, while improving the protective quality of engine oil.  Minimizes oil disposal costs, reduces downtime and increases productivity.
  • ELIMINATOR™ - Self-cleaning filtration system comes standard and combines full-flow and bypass filters with an oil-pressure-powered centrifuge.  Stainless steel filter screens trap particles as small as 20 microns; centrifuge removes particles as small as 2 microns.

View a printable file of the Eliminator™ and Centinel™ brochure.

Many options are available* to ensure your Cummins engine integrates perfectly into your product, including:

Installation configuration – numerous options are available including SAE flywheels and flywheel housings, exhaust outlet configurations, and accessory drive mounts.

Alternators – 24 volt alternators are available in a size to suit your application.

Air Compressors – water cooled and available in single or twin cylinder.

Fan Hubs – multiple combinations of mounting height, drive ratio and spacers ensure compatibility with your cooling package.

Hydraulic Pump Drive – conveniently located within the engine envelope to minimize installation impact.

Cold Starting Aids – grid heater, ether injection and oil pan heaters to help your engine start even in the most extreme temperatures

*Not all options are available for each engine family. Please contact you local Cummins distributor or dealer for more information.

The Cummins QuickServe® Commitment.

Cummins QuickServe offers you factory-certified technicians, the most sophisticated diagnostic and repair tools in the industry, and the largest international parts and service network of any engine manufacturer. Our worldwide team of mobile service technicians is always ready to deliver service when and where you need it. Every minute. Every day. Every year.

The base warranty includes full coverage on every QSK78 engine and branded components, including electrics such as starters and alternators for unlimited hours during the first year of operation, extending through 2 years or 2,000 hours (whichever comes first). The base warranty also includes 3-year/10,000-hour standard protection on major components including block, crankshaft, camshaft and rods.

Extended coverage is available with our Encompass protection plans providing the flexibility to meet the needs of your mining operation.  Cummins Encompass has you covered, around the clock and around the globe. 

For complete warranty details, please see the US and Canadian warranty brochure (3381321) or International warranty brochure (3381322)