C4.4 China NR4

Cat® C4.4 Diesel Engine

The Cat® C4.4 industrial diesel engine is offered in ratings ranging from 110-129.4 kW (147.5-173.5 hp) @ 2200 rpm, which meet China Nonroad Stage IV emission standards. The C4.4 is designed to meet the needs of many industries and applications, including bore/drill rigs, chippers/grinders, material handling, mining, earthmoving equipment, paving equipment, pumps, fruit harvesters equipment, turf and underground mining equipment.


A modular and compact core on the Cat C4.4 makes installing the engine on any number of machine applications a relative breeze. And when downsizing from five-liter platforms, OEMs can see a 20% reduction in length, 5% reduction in height and 40% reduction in weight of the engine, significantly reducing installation costs.

Advanced Features

With a 20% increase in power density and 30% increase in torque when compared to its predcessor engine, the compact design of the Cat C4.4 reduces heat loss for more efficient engine output, so operators can conquer even the toughest tasks with relative ease.

Ideal Applications

Industrial, agricultural and construction applications such as: pumps • compressors • chippers • grinders • asphalt paving equipment • hydraulic power units • bore rigs • drill rigs • tractors.

Total Cost of Ownership

There's a lot that can affect the lifetime cost of ownership of your engine. It can be as simple as fluid intake and as complex as weight distribution. Either way, the Cat C4.4 has it covered. When compared to similar 6-cylinder plaforms, the C4.4 saves more than 18% in fluid consumption and is specially balanced to be its most effective, every day.

Cat Dealer Product Support

The Cat C4.4 makes maintenance and service routines simple thanks to the worldwide Cat dealer network support. And for even more peace of mind, your Cat engine comes under warranty. See your Cat dealer for details.


Built-in clean emissions modules keep the Cat C4.4 performing at its peak while also keeping the air around the work site cleaner.

Documents & Brochures

Standard Equipment

Air Inlet System
  • Standard air cleaners
Control System
  • Full electronic control system, all connectors and wiring looms waterproof and designed to withstand harsh off-highway environments
  • Flexible and configurable software features and well-supported SAE J1939 CAN bus enables highly integrated machines
Cooling System
  • Top tank temperature 108° C (226° F) as standard to minimize cooling pack size
  • 50:50 water glycol mix
Flywheels and Flywheel Housing
  • Fitted with SAE3 configuration as standard
Fuel System
  • Electronic high pressure common rail
  • Innovative filter design to ensure maximum protection of the engine
Lube System
  • Wide choice of sumps for different applications
Power Take Off
  • SAE A and SAE B flanges on left-hand side. Additional SAE A flange available on left-hand side. Engine power can also be taken from the front of the engine on some applications. Factory fitted compressors are also available.
  • Available with or without a balancer
  • Paint: Caterpillar yellow, with optional colors available at request
China Nonroad Stage IV Aftertreatment / Clean Emissions Control Equipment
  • Clean Emissions Module (CEM), consisting of Diesel Particulate Filter (DPF) and Diesel Oxidation Catalyst (DOC)
China Nonroad Stage IV Aftertreatment/ Clean Emissions Control Equipment
  • Selective Catalytic Reduction (SCR)
  • 3" flex pipe connection with straight, 45°, and 90° options for flexibility

Additional information

Offering Type

Power Rating - Maximum Power

129.4 kW ( 173.5 HP )

Power Rating - Maximum Torque

750 Nm @ 1400 rpm ( 553 lb-ft @ 1400 rpm )

Power Rating - Rated Speed

2000 to 2200 rpm

Power Rating - Minimum Power

110 kW ( 147.5 HP )

Emission Standards - Emissions

China Nonroad Stage IV

General - Engine Configuration

Inline 4, 4-Stroke-Cycle Diesel

General - Bore

105 mm ( 4.1 in )

General - Stroke

127 mm ( 5 in )

General - Displacement

4.4 l ( 268.5 in³ )

General - Compression Ratio


General - Aspiration

Turbocharged Aftercooled (TA) or Series Turbocharged Aftercooled (TTA)

General - Combustion System

Direct Injection

General - Rotation from Flywheel End


General - Aftertreatment


Engine Dimensions - Approximate - Length

630 mm ( 24.8 in )

Engine Dimensions - Approximate - Width

748 mm ( 29.4 in )

Engine Dimensions - Approximate - Height

897 mm ( 35.3 in )

Engine Dimensions - Approximate - Weight - Net Dry - Basic Operating Engine Without Optional Attachments

535 kg ( 1179 lb )

Aftertreatment Dimensions - Length

673 mm ( 26.5 in )

Aftertreatment Dimensions - Width

411 mm ( 16.2 in )

Aftertreatment Dimensions - Height

309 mm ( 12.2 in )

Aftertreatment Dimensions* - Diameter

270.3 mm ( 10.64 in )

Aftertreatment Dimensions - Weight

50 kg ( 110 lb )

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