Developed from the Cummins K2000E, the QSK50 builds upon its legendary robustness with an extended ratings range, improved power delivery and upgrades to meet U.S. EPA Tier 2 emissions levels with in-cylinder technology. Single-piece ferrous cast ductile iron pistons contribute to 10% longer life-to-overhaul compared to two-piece designs.
The QSK50 also features the advanced Cummins Modular Common Rail (MCR) fuel system that maintains constant fuel injection pressure at all engine speeds - realizing greater application flexibility and precision by controlling both injection rates and timing. Multiple injection events during each power stroke yield smoother, more consistent power at every rpm.
MCR technology helps to reduce noise emissions (the QSK50 is 80% quieter at idle than the K50) and engine vibration, resulting in a safer and more comfortable work environment for equipment operators and mine personnel.
Cummins analysis-led computer modeling has enabled Cummins to optimize the in-cylinder combustion system of the QSK50 which results in a reduction of NOx by 40% and particulate matter by 60%, achieving U.S. EPA Tier 2 emissions levels with minimal impact to fuel consumption.
Advanced engine monitoring, an optional feature that lets you monitor equipment performance on the job in real time, and lubrication elements such as Prelub™ help to extend service intervals and achieve a lower cost per ton.
QSK50 customers also benefit from reduced maintenance and exceptional customer support.
Every QSK50 engine is covered by Cummins base warranty, one of the most comprehensive and simplest plans in the industry.
Click here for a printable file of the QSK50 brochure.
