C4.4 China Nonroad IV engine with aftertreatment

Industrial Diesel Engines C4.4 China NR4

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Key Specs

Maximum Power
173.5 HP
129.4 kW
Maximum Torque
553 lb-ft @ 1400 rpm
750 Nm @ 1400 rpm
China Nonroad Stage IV
China Nonroad Stage IV


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.

Product Specifications for C4.4 China NR4

Maximum Power 173.5 HP 129.4 kW
Maximum Torque 553 lb-ft @ 1400 rpm 750 Nm @ 1400 rpm
Rated Speed 2000 to 2200 rpm 2000 to 2200 rpm
Minimum Power 147.5 HP 110 kW
Emissions China Nonroad Stage IV China Nonroad Stage IV
Engine Configuration Inline 4, 4-Stroke-Cycle Diesel Inline 4, 4-Stroke-Cycle Diesel
Bore 4.1 in 105 mm
Stroke 5 in 127 mm
Displacement 268.5 in³ 4.4 l
Compression Ratio 16.5:1 16.5:1
Aspiration Turbocharged Aftercooled (TA) or Series Turbocharged Aftercooled (TTA) Turbocharged Aftercooled (TA) or Series Turbocharged Aftercooled (TTA)
Combustion System Direct Injection Direct Injection
Rotation from Flywheel End Counterclockwise Counterclockwise
Aftertreatment DOC+DPF+SCR DOC+DPF+SCR
Length 24.8 in 630 mm
Width 29.4 in 748 mm
Height 35.3 in 897 mm
Weight - Net Dry - Basic Operating Engine Without Optional Attachments 1179 lb 535 kg
Length 26.5 in 673 mm
Width 16.2 in 411 mm
Height 12.2 in 309 mm
Weight 110 lb 50 kg
Diameter 10.64 in 270.3 mm

C4.4 China NR4 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

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