QSK78 for Mining


QSK78 for MiningWhether 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.


Engine Type 60o Vee, 18-Cylinder
Displacement 4735 cu in 78 liters
Advertised Horsepower 3500 hp 2610 kW
Peak Torque 10157 lb-ft @ 1500 rpm 13771 N•m
Bore and Stroke 6.69 in x 7.48 in 170 mm x 190 mm
Aspiration Two-Stage Turbocharged,
Intercooled and Aftercooled
Oil System Capacity 304 U.S. qt 288 liters
Coolant Capacity* 236 U.S. qt 224 liters
Length 131 in 3327 mm
Width 65.5 in 1663 mm
Height 95.6 in 2429 mm
Weight (Wet) 24912 lb 11300 kg

* Engine only


Product Finder Specifications

Power 3500 hp / 2610 kW
Torque 10157 lb-ft / 13771 N•m


Engine Model Advertised hp (kW) @ rpm Peak Torque lb-ft (N•m) @ rpm
QSK78-3500 3500 (2610) @ 1900 10157 (13771) @ 1500


  • 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.

Brochures Available

Title Bulletin Number Request View  
Centinel / Eliminator Brochure 4081790 Request View  Download
Cummins Tier 4 Final High-Horsepower Engines For The Mining Industry Brochure 4087264 Request View  Download
High-Performance Engines For Mining Equipment Brochure 4087235 Request View  Download
Partnership That Pays. Zhungeer, China, Mine Case Study Brochure 4087395 Request View  Download
QSK78 Engines For Mining Applications Spec Sheet 4087274 Request View  Download