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Cummins B Series engines are hard at work on every acre of every field. In fact, with over three million Cummins B Series engines in operation around the globe today, there is no question that these engines are proven performers. Available in a range of ratings from 80 to 173 hp, these midrange engines deliver strong performance with a minimum of maintenance.

Specifying the right combination of standard features and options for your equipment is easy, with Cummins Advisor providing expert assistance.

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

 
Engine ModelAdvertised hp (kW) @ rpmPeak hp (kW) @ rpmPeak Torque lb-ft (N•m) @ rpmAspiration
B5.9
B5.9-173173 (129) @ 2500173 (129) @ 2300530 (719) @ 1500Turbo & Charge Air Cooled
B5.9-173173 (129) @ 2200177 (132) @ 2000580 (786) @ 1300Turbo & Charge Air Cooled
B5.9-165165 (123) @ 2500165 (123) @ 2300494 (670) @ 1500Turbo & Charge Air Cooled
B5.9-165165 (123) @ 2200165 (123) @ 2000524 (710) @ 1300Turbo & Charge Air Cooled
B5.9-152152 (113) @ 2500152 (113) @ 2300453 (614) @ 1500Turbo & Charge Air Cooled

B5.9-150**

150 (112) @ 2200150 (112) @ 2200467 (633) @ 1300Turbo & Charge Air Cooled
B4.5
B4.5-9999 (74) @ 2500104 (78) @ 2300305 (414) @ 1500Turbocharged
B4.5-9999 (74) @ 2200104 (78) @ 2000305 (414) @ 1500Turbocharged
B4.5-92*92 (69) @ 220097 (72) @ 2100300 (407) @ 1500Turbocharged
B4.5-80*80 (60) @ 250080 (60) @ 2300222 (301) @ 1300Naturally Aspriated
B4.5-8080 (60) @ 220080 (60) @ 2100217 (294) @ 1300Naturally Aspriated
B3.9
B3.9-125125 (93) @ 2200125 (93) @ 2100373 (506) @ 1300Turbo & Charge Air Cooled
B3.9-110110 (82) @ 2500110 (82) @ 2300346 (469) @ 1500Turbo & Charge Air Cooled
B3.9-110*110 (82) @ 2200110 (82) @ 2000365 (495) @ 1300Turbo & Charge Air Cooled

All ratings are intermittent unless otherwise noted. Additional ratings may be available. Check with your Cummins distributor or dealer.
*Indicates a restricted rating.
**Indicates a continuous rating.

For years, farmers have relied on Cummins B Series engines to power everything from their tractors to their swathers and pumps.

Cummins B Series engines are proven performers on every terrain in every condition. Whether you need a low-horsepower engine with a flat torque curve or a little more horsepower with a sharp torque rise, you'll find it in a Cummins B Series. These engines feature highly reliable, durable rotary fuel pumps that deliver a steady stream of pressurized fuel for strong performance across a wide range of environmental conditions.

Cummins B3.9, B4.5 and B5.9 also put less noise in the air, making a more productive work environment.
Specifications.
 B3.9B4.5B5.9
Advertised Horsepower110-125 hp82-93 kW80-99 hp60-74 kW150-173 hp112-129 kW
Peak Torque346-373 lb-ft469-506 N•m217-305 lb-ft294-414 N•m453-580 lb-ft614-786 N•m
Cylinders446
Oil System Capacity11.5 U.S. qt10.9 liters11.5 U.S. qt10.9 liters17.2 U.S. qt16.3 liters
Length30.6 in777 mm30.6 in777 mm40.0 in1016 mm
Width24.6 in625 mm24.6 in625 mm24.9 in632 mm
Height37.7 in958 mm35.5 in902 mm37.9 in963 mm
Weight (Wet)745-782 lb338-355 kg721-745 lb327-338 kg952-997 lb432-452 kg

You can depend on B Series engines for reliable performance, every day and every month of every year. Heavy-duty components include:
  • Forged-steel crankshafts built stronger to last longer
  • Plateau-honed cylinder liners to eliminate oil consumption
  • Holset wastegated turbochargers which optimize operation across the torque curve with improved response
  • A parent-bore cylinder block designed for reduced noise and increased durability
  • Rotary fuel pumps which are highly dependable and durable
  • Edge-molded gaskets for reduced oil use

Cummins B Series engines are the ultimate in design flexibility. They give you hundreds of application options to meet your specific agricultural needs in every terrain under every condition. These options include:
  • Flywheels
  • Flywheel housings
  • Starters
  • Alternators
  • Oil pans
  • Air-handling options
  • Cooling system options
  • Accessory drive mounting options
  • Fan drive options
  • Plus noise reduction packages that eliminate up to 4.5 dBA of acoustic output

With profit margins as tight as they are for farming, there's no time for down time. That's why every Cummins B3.9, B4.5 and B5.9 engine has been designed for reduced maintenance, with plateau-honed cylinders, an innovative ring pack design and edge-molded gaskets for significantly reduced oil consumption.
Maintenance Intervals.

With Cummins B Series engines little or no top-off oil should be needed between oil changes that can be extended up to 500 hours.

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

The base warranty includes full coverage on every B Series 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 agriculture 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 what Cummins Advisor is all about. Advisor software builds a virtual model to make sure every system (air, intake, exhaust, cooling) is integrated for optimum performance. It takes into account everything from load factors to operating climates to duty cycles - then identifies systems or components that could negatively impact reliability - listing alternatives that deliver the performance you expect the first time - every time.