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The Cummins QSB4.5 achieves Tier 3 and Stage IIIA compliance with in-cylinder technology that maintains a compact, simple installation that provides premium performance to every application.

The QSB4.5 makes every piece of construction equipment work harder, smarter, quieter and longer. Every time. It shares technology with the rest of our highly successful B Series, including charge air cooling and turbocharging for strong performance. Power ratings range from 110-170 hp (82-127 kW).

This engine combines proven full-authority electronic controls with the impressive reliability and durability and long maintenance intervals you expect from one of the world's most successful and durable designs.

Every QSB4.5 has improved cold-start capability and is 5-9 decibels quieter in operation than its predecessor. Plus, it runs as quietly at full load as the previous QSB did with no load! A wide range of features are standard.

To ensure that every QSB4.5 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 QSB4.5 engine is covered by Cummins three-step warranty, one of the most comprehensive and simplest plans in the industry.

To view and print a PDF file of our Tier 3 QSB brochure, click here.

 
Engine
Model		Advertised
hp (kW) @ rpm		Peak
hp (kW) @ rpm		Peak Torque
lb-ft (N•m) @ rpm
QSB4.5 170*170 (127) @ 2500170 (127) @ 2500459 (622) @ 1500
QSB4.5 160160 (119) @ 2500165 (123) @ 2300460 (624) @ 1500
QSB4.5 160160 (119) @ 2400165 (123) @ 2200460 (624) @ 1500
QSB4.5 160**160 (119) @ 2300165 (122) @ 2200460 (624) @ 1500
QSB4.5 160 160 (225) @ 2200 168 (125) @ 2000 459 (622) @ 1500 
QSB4.5 160**160 (225) @ 2200165 (123) @ 2000460 (624) @ 1500
QSB4.5 155155 (116) @ 2000155 (116) @ 2000460 (622) @ 1500
QSB4.5 152152 (110) @ 2200152 (110) @ 2200405 (537) @ 1500
QSB4.5 148148 (110) @ 2300156 (116) @ 2000441 (598) @ 1500
QSB4.5 139139 (104) @ 2000139 (104) @ 2000371 (503) @ 1800
QSB4.5 132132 (98) @ 2000132 (98) @ 2000368 (499) @ 1500
QSB4.5 130130 (97) @ 2500140 (104) @ 2400459 (622) @ 1500
QSB4.5 130130 (97) @ 2300130 (97) @ 2300377 (511) @ 1500
QSB4.5 130**130 (97) @ 2200140 (104) @ 2000459 (622) @ 1500
QSB4.5 130130 (97) @ 2000135 (101) @ 1800457 (620) @ 1500
QSB4.5 130130 (97) @ 1800130 (97) @ 1800400 (452) @ 1400
QSB4.5 121**121 (90) @ 2200121 (90) @ 2200347 (470) @ 1500
QSB4.5 110110 (82) @ 2500115 (86) @ 2300360 (489) @ 1500
QSB4.5 110**110 (82) @ 2200115 (86) @ 2000360 (489) @ 1500
QSB4.5 110110 (82) @ 1800110 (82) @ 1800360 (488) @ 1300

Additional ratings may be available. Check with your Cummins distributor.
*Indicates a restricted rating.
**Indicates a continuous rating.
Specifications.
Engine TypeIn-Line, 4-Cylinder
Displacement4.5 L* (275 cu in)
Advertised Horsepower109-170 hp (81-127 kW)
Peak Torque460 lb-ft (624 N•m)
AspirationTurbocharged and Charge Air Cooled
Oil System Capacity11.6 U.S. qt (11 L*)
Coolant Capacity9 U.S. qt (8.5 L*)
Length32.2 in (818 mm)
Width28.1 in (713 mm)
Height34.5 in (878 mm)
Wet Weight818 lb (371 kg)

*L=Liters/Litres

The QSB4.5 delivers lasting value for your farming operation, with standard features that include:

  • High Pressure Common Rail Fuel System - Delivers high injection pressure (1600 bar) for improved performance and fuel efficiency at every rpm
  • In-Cylinder Combustion Technology - Meets emissions standards without external components; is compatible with high-sulfur fuels for worldwide use
  • Rear Gear Train - Significantly lowers noise output to meet worldwide noise emission standards
  • Wastegated Turbocharger - Designed by Cummins Turbo Technology. Wastegated for better low-speed performance and high-speed boost
  • Two-Stage Dual Fuel Filter - Provides a balanced level of particle separation to maximize fuel filter life and protect vital fuel system components
  • Parent Bore Cylinder Block - Designed for reduced noise and increased durability
  • Directed Piston Cooling - Lower piston temperatures lead to longer life
  • Wider Camshaft Lobes and Larger Tappet Wear Surface - Enhance durability and reliability

 

The QSB4.5 has been designed for minimal maintenance procedures. Dual stage fuel filtration will improve particle separation and filter life, and protect vital fuel system components. The QSB4.5 is 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.

The base warranty includes full coverage on every QSB4.5 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. 

Three simple steps explain everything you need to know:

Step One: Full coverage on all Cummins industrial engines and branded components with unlimited hours during the first year of operation. This includes Cummins branded electrics such as alternators, starters, etc.

Step Two: Full coverage is extended for the second year, up to 2,000 hours of operation. Total hours are cumulative from the time the engine goes in service.

Step Three: Major components coverage including block, crankshaft, camshaft and rods on all products for the third year or up to 10,000 hours of operation.

Extended coverage is available with our Encompass Protection Plans with the flexibility to meet the needs of your construction 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)

Getting every installation right - the first time - is as important to Cummins as it is to you. PowerMatch and Advisor help ensure that we get it right, every time.
PowerMatch.

Cummins PowerMatch helps OEMs optimize engine performance so you can lower fuel consumption, increase operator satisfaction, improve equipment life and protect the customer's investment. PowerMatch tailors engine performance to specific equipment models and applications. Advanced electronics are used to enhance power curves and trim ratings, matching the job the equipment will be doing while taking into account variables such as work environment, load factors, ambient temperature and altitude. PowerMatch can also be used to create a unique torque curve, set up alternate governor settings or set up engine protection features.

Advisor.

Advisor puts a virtual engineer on the OEM team to shorten engineering cycle times and reduce costs. After a comprehensive review of load factors, climates, duty cycle and equipment usage, Cummins Advisor recommends the best engine and rating match for the equipment and operating conditions. It then builds a virtual model of the intake, exhaust, cooling, fuel and mounting systems. When Advisor identifies an issue, it lists acceptable alternatives. This approach allows changes while the equipment design is still "on paper," ensuring optimum performance while minimizing costs. Every time.



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