Cat® C7.1 ACERT™ Diesel Engine

Cat® C7.1 ACERT™ Diesel Engine

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Demanding conditions, applications and environments make the Cat® C7.1 engines the perfect solution for your severe duty equipment. With decades of diesel engine innovation and expertise behind these ...

Power Rating

Minimum Power
Maximum Power
Rated Speed
2200 rpm

Emission Standards

U.S. EPA Tier 4 Final Nonroad, EU Stage V Nonroad Emissions Standards


Engine Configuration
In-Line 6, 4-Stroke-Cycle Diesel
105 mm (4.1 in)
135 mm (5.3 in)
7 L (427.7 in³)
Turbocharged-Aftercooled (TA) or Series Turbocharged Aftercooled (TTA)
Compression Ratio
Combustion System
Direct Injection
Rotation from Flywheel End
Cooling System - Capacity
15.2 L (16 qt)
Lube System - Refill
13-16 L (13.7-16.9 U.S. qts)

Aftertreatment Dimensions - Approximate

623-769 mm (24.5-30.3 in)
65-107 kg (143.3-235.9 lb)
610-733 mm (24-28.9 in)
453-455 mm (17.8-18.1 in)
287-337.8 mm (11.3-13.3 in)

Engine Dimensions - Approximate

753-820.2 mm (29.6-32.3 in)
1063.7 mm (41.9 in)
Weight - Net Dry - Basic Operating Engine Without Optional Attachments
715 kg (1576 lb)
907 mm (35.7 in)

Reliable, Quiet and Durable Power

World-class manufacturing capability and processes coupled with proven core engine designs assure reliability, quiet operation, and many hours of productive life.

High Performance

Series turbocharging with smart wastegate available on specific ratings for fast response, high power, and increased torque.

Fuel Efficiency

Fuel consumption optimized to match operating cycles of a wide range of equipment and applications while maintaining low operating costs.

Fuel & Oil

Tier 4 Final, or Stage V engines require Ultra Low Sulfur Diesel (ULSD) fuel containing a maximum of 15 ppm sulfur, and new oil formulations to support the new technology. Cat® engines are designed to accommodate B20 biofuel. Your Cat dealer can provide more information regarding fuel and oil.

Broad Application Range

Industry leading range of factory configurable ratings and options for agricultural, material handling, construction, mining, aircraft ground support, and other industrial applications.

Package Size

Exceptional power density enables standardization across numerous applications. Multiple installation options minimize total package size. Ideal for equipment with narrow engine compartments.

Low Cost Maintenance

Worldwide service delivers ease of maintenance and simplifies the servicing routine. Hydraulic tappets, multi-vee belts, minimum 5000-hour diesel particulate filter (DPF) ash service interval and 500-hour oil change intervals enable low-cost maintenance. Many service items have a choice of location on either side of the engine to enable choice of service access. The S·O·SSM program is available from your Cat dealer to determine oil change intervals and provide optimal performance.


Every Cat engine is manufactured to stringent standards in order to assure customer satisfaction.

World-class Product Support Offered Through Global Cat Dealer Network

  • Scheduled maintenance, including SOSSM sample
  • Customer Support Agreements (CSA)
  • Caterpillar Extended Service Coverage (ESC)
  • Superior dealer service network
  • Extended dealer service network through the Cat Industrial Service Distributor (ISD) program

Tier 4 Final, Stage V Aftertreatment Features

Regeneration. The DOC/SCR modular design offers a simple, compact package while providing high levels of performance. A DOC/DPF/SCR option is available for higher power machines. While in use, both DOC/SCR an DOC/DPF/SCR systems offer transparent operation to the user.

Mounting. Extensive range of inlets and outlets, as well as remote and on-engine installations, provide flexibility for many installations.

Service. Both DOC/SCR an DOC/DPF/SCR systems are service-free for the emissions life of the engine.

Available in 12V or 24V systems

Standard Equipment: