QSL9 for Agriculture (Tier 4 Interim)


QSL9 for Agriculture (Tier 4 Interim)

Cummins next generation QSL9 meets the stringent EPA Tier 4 Interim and EU Stage IIIB emissions standard with improved performance and wide-ranging power solution extending from 240-400 hp (179-298 kW).  The QSL9 will achieve up to 5 percent better fuel efficiency*, lowering your cost of operation and improving your bottom line.

The QSL9 achieves these very low emission standards by using our proven cooled Exhaust Gas Recirculation (EGR) and Cummins Particulate Filter.  Both systems have been specifically developed for industrial applications to deliver premium performance and durability you can depend on.

The Tier 4 Interim and Stage IIIB 8.9-liter engine incorporates Cummins XPI Extra-High Pressure Injection fuel system enabling very high fuel injection pressure across all engine rpm speeds, providing cleaner combustion and improved engine response.  The fuel system is complemented by a Cummins Variable Geometry Turbocharger (VGT™) which continuously varies the air-flow boost to precisely match engine rpm and load demands for optimal performance.

Additional performance-enhancing features include Cummins Direct Flow air filtration system providing a 35 percent smaller installation profile than radial air filters, plus improved filtration efficiency and a crankcase ventilation system with a highly-efficient coalescing filter.  Cummins Electronic Control Module manages all components for a completely integrated system providing the impressive reliability and durability and long maintenance intervals you expect from the industry’s Tier 4 technology leader. 

All backed by the best customer support in the industry.

Want to know what up to 5 percent better fuel efficiency will mean for your bottom line?  Visit the Fuel Duel page to find out.

*Depending on rating and installation optimization.


Engine Type  In-Line, 6-Cylinder 
Displacement   8.9 L* (543.1 cu in) 
Advertised Horsepower  230-400 hp (172-298 kW) 
Peak Torque  675-1200 lb-ft (915-1627 N•m) 
Bore And Stroke  4.49 in (114 mm) 
5.69 in (145 mm) 
Aspiration   Turbocharged and Charge Air Cooled 
Oil System Capacity  7.3 U.S. gallons (27.6 L*) 
Length   44.3 in (1125.2 mm) 
Width   45.8 in (1163.3 mm) 
Height   46.6 in (1183.6 mm) 
Engine (Wet)  1,560 lb  (708 kg) 
*L = Liters / Litres

Engine Finder Specifications

Certification Level Tier 4 Interim / Stage IIIB
Power 230 - 400 hp / 172 - 298 kW
Torque 675 - 1200 lb-ft / 915 - 1627 N•m


Direct Flow Air Filtration System - Specifically developed for Tier 4 platforms to provide a smaller, more flexible installation package and higher air filtration efficiency. 

XPI Fuel System - Delivers a precise quantity of fuel at ultra-high pressures.  This, together with more robust electronic engine controls, enables multiple injection events per cycle.

Variable Geometry Turbocharger (VGT™) - Enhanced response and control with electric actuation for an infinite adjustment, providing exact boost across the operating range. Sliding-nozzle design increases reliability, durability.

Fully Integrated Electronic Controls - A single, higher-capacity Electronic Control Module (ECM) controls everything from air intake to exhaust aftertreatment for peak performance.

Cooled Exhaust Gas Recirculation (EGR) - Lowers combustion temperatures for reduced emissions and optimized fuel efficiency.

Cummins Particulate Filter - Fully integrated for uncompromising performance, reliability.  Removes over 90% of particulate matter and is specifically developed to withstand severe shock loads and vibrations typical of off-highway applications.

Crankcase Ventilation System – Prevents crankcase emissions escaping from the engine with a highly-efficient coalescing filter.  Also, eliminates oil mist and tiny oil droplets to maintain clean engine operating conditions.

Lowest Cost Of Operation - Reduced maintenance, long service intervals and the best fuel efficiency of any engine in its class add up to superior lifetime value.

Brochures Available

Title Bulletin Number Request View  
Cummins Agriculture Brochure - Growing Together (English) - A4 Format 4087328 Request View  Download
Cummins Agriculture Brochure - Growing Together (German) - A4 Format 4087329 View  Download
Cummins Particulate Filter Flyer (Tier 4 Interim) 4087179 Request View  Download
Cummins Sulfur Tolerance Kit For Off-Highway Engines Flyer 4087440 Request View  Download
Meeting EPA 2011 Tier 4 Interim And EU Stage IIIB Emissions - Customer FAQ (174-751 hp) 4087190 View  Download
QSB6.7 And QSL9 (190-400 hp) Tier 4 Interim/Stage IIIB Spec Sheet 4087186 Request View  Download
Tier 4 Interim Customer Testimonial Brochure 4087166 Request View  Download
Tier 4 Interim Product Range Brochure 4087165 Request View  Download