QSC (Tier 3)

Overview

QSC (Tier 3)The QSC meets Tier 3 and Stage IIIA emissions standards, by using in-cylinder technology, a simple and cost-effective solution that maintains the proven performance, dependability and durability of the QSC while operating cleanly and efficiently.

Cummins QSC engines are built on one of the world's most successful - and durable - engine block designs. In fact, there are over three quarters of a million in use around the globe every day.

The QSC advanced electronics provide enhanced engine performance with higher torque and better throttle response at every rpm. Electronic engine control provides additional advantages that include increased fuel economy, precision diagnostics and engine protection. The QSC also offers enhanced maintenance intervals, improved cold starting plus up to 50% quieter operation for improved operator comfort.

Available in a range of ratings from 205-305 hp (153-227 kW), the QSC meets every Tier 3 and Stage IIIA emissions standard without compromise.

The QSC offers a wide range of standard features. And options like REPTO (Rear Engine Power Take-Off) add broad functionality.

To ensure that every QSC is perfectly matched to every piece of equipment, Cummins PowerMatch and Advisor are ready to provide expert assistance with your spec'ing and installation process.

Every QSC engine is covered by Cummins three-step warranty, one of the most comprehensive and simplest plans in the industry.

Specifications

The QSC 24-valve cylinder head, High-Pressure Common-Rail (HPCR) fuel system and robust electronic controls make for a completely programmable, highly durable, highly fuel-efficient power plant. With one of the highest power-to-weight ratios and lowest cost of operation of any engine in its class. And ratings that range from 215-305 hp (160-228 kW) to deliver the power and the versatility you need to match your equipment. Every time.

Specifications.
Engine Type In-Line, 6-Cylinder  
Displacement 506 cu in 8.3 L*
Advertised Horsepower 205-305 hp 153-227 kW
Peak Torque 675-1020 lb-ft 915-1383 N•m
Bore and Stroke 4.49 in x 5.31 in 114 mm x 135 mm
Aspiration Turbocharged and Charge Air Cooled  
Oil System Capacity 21 U.S. qt 19.9 L*
Coolant Capacity 11 U.S. qt 10.4 L*
Length 44.4 in 1128 mm
Width 30.9 in 785 mm
Height 41.8 in 1062 mm
Weight (wet) 1,594 lb 723 kg

* L = Liters/Litres

Engine Finder Specifications

Markets
Certification Level Tier 3 / Stage IIIA
Power 205 - 305 hp / 153 - 227 kW
Torque 675 - 1020 lb-ft / 915 - 1383 N•m

Ratings

Engine Model Advertised hp (kW) @ rpm Peak hp hp (kW) @ rpm Peak Torque lb-ft (N•m) @ rpm
QSC 305 305 (227) @ 2200 333 (248) @ 2000 1020 (1383) @ 1500
QSC 305 305 (227) @ 2100 320 (239) @ 1900 1020 (1383) @ 1500
QSC 300 300 (224) @ 2200 333 (248) @ 2000 1008 (1367) @ 1500
QSC 300 300 (224) @ 2100 320 (239) @ 1900 1000 (1356) @ 1500
QSC 290 290 (216) @ 2200 310 (231) @ 2000 940 (1274) @ 1500
QSC 280 280 (209) @ 2200 300 (224) @ 2000 1000 (1356) @ 1500
QSC 280 280 (209) @ 2100 300 (224) @ 1900 1000 (1356) @ 1500
QSC 275 275 (205) @ 2200 290 (216) @ 2000 895 (1213) @ 1500
QSC 260 260 (194) @ 2200 280 (209) @ 2000 870 (1180) @ 1500
QSC 260 260 (194) @ 1900 280 (209) @1900 830 (1125) @ 1400
QSC 250 250 (186) @ 2200 265 (197) @ 2000 830 (1125) @ 1500
QSC 245 245 (183) @ 2200 278 (207) @ 2000 857 (1162) @ 1500
QSC 245* 245 (183) @ 1800 245 (183) @ 1800 870 (1180) @ 1400
QSC 240 240 (179) @ 2200 260 (194) @ 2000 800 (1085) @ 1500
QSC 230 230 (172) @ 2200 250 (186) @ 2000 800 (1085) @ 1500
QSC 215 215 (160) @ 2200 230 (172) @ 2000 675 (915) @ 1500
QSC 205  205 (153) @ 1950 223 (166) @ 1800 745 (1010) @ 1450 
 All ratings are intermittent unless otherwise noted. Additional ratings may be available. Check with your Cummins distributor or dealer.
*Indicates continous rating

Features

Standard features of the QSC include:

  • Full-Authority Electronic Controls - Provide seamless integration with other components to optimize engine operation.
  • Stiffer Block and Head - For reduced noise and vibration. Fluid circuits are integrated, replacing hoses and eliminating potential leaks.
  • High-Pressure Common-Rail Fuel System - Allows multiple injection events for cleaner, quieter operation with consistent performance at every rpm. Also improves cold-weather starting.
  • Wastegated Turbocharger - Delivers maximum power and torque.
  • Mid-Stop Cylinder Liners - Reduce cavitation and improve rebuildability.
  • Auto-Tensioning Belt Drive - Self adjusting for optimum tension, which increases fan, alternator and fan belt life.
  • Heavy-Duty Roller Followers - Cam roller followers give the QSC superior durability and cam life.
  • Two-Stage Dual Fuel Filtration - Provides a balanced level of particle separation to maximize fuel filter life and protect the vital fuel system components.
  • Gear Housing Design and Front-End Support - The gear housing and accessories mount directly to the block for improved durability.
  • Improved Piston Design - Symmetrical piston bowl combines with centered injectors to deliver optimal combustion.
  • Heavy-Duty Lube System - Targeted piston cooling and increased lube flow to the power cylinder result in increased piston reliability and durability. Improved lube and bypass filtration system increase ring and bearing life by as much as 63%.
  • Improved Crankcase Ventilation - Virtually eliminates oil carryover.
  • Valve Cover and Gasket - Isolated design with perimeter bolting for better sealing and improved reliability.

Maintenance

Maintenance Intervals

Minimum maintenance has been designed into every QSC engine. A two-stage dual fuel filter approach consisting of a 10-micron filter and a pressure-side 3-micron filter maximizes fuel filter life. An integrated water pump, lube pump, and cooler housings and coolant bypass eliminate possible leak points. QSC engines are designed to run up to 500 hours between scheduled fuel and oil filter changes.

For complete maintenance information, please consult your Owner's Manual or Operations and Maintenance Manual.

Brochures Available

Title Bulletin Number Request View  
Every Solution - Tier 3 Engine Brochure 4087035 Request View  Download
National Overhaul Warranty For MidRange Engines Flyer 4021552 Request View  Download
QSC Tier 3 for Industrial Applications Spec Sheet 4087067 Request View  Download
QSC Tier 3 for Industrial Applications Spec Sheet - French 4087083 Request View  Download