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Mining is a tough, demanding business - it needs to be supported by equipment with the power, durability, reliability, cost-effectiveness and performance that the job demands. You can count on the Cummins QSK23 to fit your most aggressive and specialized applications. Every time.

The QSK23 combines rugged productivity with a high power density and advanced engine management technology to deliver the lowest operating cost per ton of any mining engine in its class. Its high-pressure injection (HPI) fuel system (up to 29,000 psi/200,000 kPa) results in more complete combustion for superior engine response across the entire power curve and the lowest fuel consumption in its class. Its compact and balanced inline six-cylinder design and proven durability in the toughest mine sites make it a great choice to repower vee engines of similar displacement.

The one-piece Ferrous Cast Ductile (FCD) iron pistons and robust cylinder head work to improve long-term durability and dependability. A one-piece cast-iron block, forged-steel crankshaft and a large-diameter camshaft are some of the standard features that ensure long, reliable performance between overhauls, with the capability of multiple rebuild cycles.

With ratings from 760-950 hp (567-708 kW) in both emissions-certified and non-certified specifications, the QSK23 is the ideal choice for haul trucks, excavators and other heavy-duty mining equipment around the world. It has the proven technology you need to raise productivity and lower costs. Every ton.

Every QSK23 engine is covered by Cummins base warranty, one of the most comprehensive and simplest plans in the industry.

QSK23 customers also benefit from reduced maintenance and exceptional customer support.

View a printable file of the QSK23 brochure.

 
Tier 2 Certified Ratings
Engine ModelAdvertised hp (kW) @ rpmPeak Torque lb-ft (N•m) @ rpm
QSK23-950950 (708) @ 21002897 (3928) @ 1400
QSK23-950950 (708) @ 18002785 (3776) @ 1400
QSK23-860860 (641) @ 21002785 (3776) @ 1400
QSK23-860860 (641) @ 18002785(3776) @ 1400
QSK23-760760 (567) @ 21002558 (3468) @ 1350
QSK23-760*760 (567) @ 18002558 (3468) @ 1350
*Continuous rating
Non-Certified Ratings
Engine ModelAdvertised hp (kW) @ rpmPeak Torque lb-ft (N•m) @ rpm
QSK23-950950 (708) @ 21002893 (3922) @ 1400
QSK23-900900 (671) @ 21002700 (3661) @ 1400
QSK23-860860 (641) @ 21002600 (3525) @ 1400
QSK23-800800 (597) @ 21002440 (3308) @ 1400
QSK23-760760 (567) @ 21002401 (3255) @ 1300

All ratings are intermittent unless otherwise noted. Additional ratings may be available. Check with your Cummins distributor or dealer.

 

 
Engine TypeIn-Line, 6-Cylinder
Aspiration Turbocharged and Charge Air Cooled 
Displacement1404 cu in23 liters
Bore and Stroke6.69 in x 6.69 in170 mm x 170 mm
Oil System Capacity54.8 U.S. qt52 liters
Coolant Capacity*48.8 U.S. qt46.2 liters
Length78.5 in1994 mm
Width42 in1067 mm
Height67.7 in1720 mm
Weight (Dry)5709 lb 2590 kg 
Weight (Wet)6300 lb2858 kg
  • One-Piece Cast-Iron Block - Heavy-duty design with wide cylinder spacing for long life and excellent rebuild capability.
  • Electronic Control System - Allows users to tailor fuel system calibrations to application requirements.  CENSE™ electronic monitoring reads engine operating conditions and automatically adjusts for peak operation.
  • 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.
  • Precision-Honed Cylinder Liners - Machined for durability.  Expansion and contraction will not create excess wear.
  • One-Piece Ferrous Cast Ductile Iron Pistons - Provide the strength and durability to handle high cylinder pressures for long life.
  • Twin Piston-Cooling Nozzles - Direct cooling streams of oil beneath each piston crown and bowl rim for long life in high-load applications with increased reliability.
  • Prelub™ System - Distributes oil to rifles and friction surfaces and builds oil pressure before cranking can occur.  A pressure switch assures proper oil pressure in the main rifle to reduce the risk of starting the engine without oil in the sump or filters.  Prelub is a standard option on all mining engines due to proven success in extending engine life-to-rebuild.
  • Large-Diameter Camshaft - 105 mm of hardened surfaces handle the loads associated with high-pressure fuel injection.
  • Seven-Bolt Cylinder Head - Delivers even clamping force, enabling high cylinder and injector pressures.
  • Two-Stage Cummins Oil Filter - Combination full-flow and bypass oil filter effectively removes harmful sludge and up to three times as many contaminants to reduce engine wear.
  • 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

Longer Service Intervals - Achieved with Centriguard™ centrifuge filters, the CENTINEL™ continuous oil replacement system and the self-cleaning ELIMINATOR™ full-flow/bypass filtration system

Centriguard™ Centrifuge Filters - The Fleetguard Centriguard from Cummins Filtration is available for aftermarket installation to complement the spin-on lube filters for greater engine protection. 
CENTINEL™ Continuous Oil Replacement System – Extends oil drain and oil filter life, while improving the protective quality of engine oil.  Minimizes oil disposal costs, reduces downtime and increases productivity. 
ELIMINATOR™ Filtration System – Eliminates oil filter disposal headaches with a full-flow and centrifugal system that incorporates a permanent core. This optional feature eliminates up to 90% of lube system maintenance costs while increasing uptime by allowing 1,000 hours between filter changes.


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 your local Cummins distributor or dealer for more information.

 

Click here to view a printable file of the Eliminator™ and Centinel™ brochure.

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 QSK23 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).