QSB6.7 for Construction (Tier 4 Interim)

Overview

QSB6.7 for Construction (Tier 4 Interim)

The EPA Tier 4 Interim and EU Stage IIIB Cummins QSB6.7 takes on your toughest job with a fully integrated system from air-intake to exhaust aftertreatment.  Ratings now extend all the way up to 300 hp (224 kW) providing performance like a larger displacement engine while offering a significant installation advantage.

The QSB6.7 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 delivering premium performance and durability you can depend on.

This engine combines cooled EGR with an improved High Pressure Common Rail (HPCR) fuel system enabling cleaner and more efficient combustion resulting in an up to 5 percent better fuel efficiency* without compromising performance. 

Improved fuel efficiency isn’t the only benefit that the new 6.7-liter engine has to offer.  Tier 4 Interim and Stage IIIB performance-enhancing features include Cummins Direct Flow air filtration system providing a 35 percent smaller installation profile than radial air filters and improved filtration efficiency.  Also our patented Variable Geometry Turbocharger (VGT™) and a crankcase ventilation system with a highly-efficient coalescing filter for cleaner engine operating conditions.  Cummins Electronic Control Module manages all components for a completely integrated system.  The QSB6.7 provides all of the performance, reliability, durability and long maintenance intervals that you would expect from an engine that won the prestigious LLEAP Gold Award for Design Leadership.

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 duty cycle and installation optimization.

Specifications

Engine Type  In-Line, 6-Cylinder 
Displacement  6.7 L* (409 cu in)
Advertised Horsepower  146-300 hp (109-224 kW)  
Peak Torque  485-730 lb-ft (658-990 N•m) 
Bore And Stroke  4.21 in (107 mm)
4.88 in (124 mm) 
Aspiration   Turbocharged and Charge Air Cooled 
Oil System Capacity  4 U.S. gallons (15.1 L*) 
Length   41.6 in (1057 mm)
Width   36.2 in (920 mm) 
Height   42.1 in (1069.3 mm) 
System Weight  1,144 lb (519 kg) 
Engine (Wet)   3,122 lb (1,416 kg)

*L = Liters / Litres

Engine Finder Specifications

Markets
Certification Level Tier 4 Interim / Stage IIIB
Power 146 - 300 hp / 109 - 224 kW
Torque 485 - 730 lb-ft / 658 - 990 N•m

Features

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

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 industrial 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.

HPCR Fuel System - Delivers a precise mixture of fuel and air at a constant pressure, regardless of engine rpm.  This flexibility in injection timing allows multiple injection events per cycle.

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 Compact Catalyst Flyer 4087178 Request View  Download
Cummins Particulate Filter Flyer (Tier 4 Interim) 4087179 Request View  Download
Cummins Power Products Brochure 4087018 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
QSB3.3, QSB4.5 And QSB6.7 (85-173 hp) Tier 4 Interim/Stage IIIB Spec Sheet 4087194 Request 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