C9.3B China NR4 Diesel Engines - Highly Regulated

Industrial Diesel Engines C9.3B China NR4

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Key Specs

Maximum Power
456 HP
340 kW
Maximum Torque
1540 lb-ft @ 1400 rpm
2088 Nm @ 1400 rpm
China Nonroad Stage IV
China Nonroad Stage IV


The Cat® C9.3B Industrial Diesel Engine is offered in
ratings ranging from 250-340 bkW (335-456 bhp)
@ 1800-2200 rpm. These ratings meet U.S. EPA
Tier 4 Final, EU Stage V, Japan 2014, and Korea Tier 4
Final* or China Nonroad Stage IV emission standards.
The C9.3B engines are ideal choices to power
applications in agriculture, aircraft ground support,
construction, forestry, general industrial, material
handling, and mining.


Delivers 18% More Power compared to previous models

21% Increase in Torque compared to previous models

Engine package is over 12% lighter compared to previous models

Product Specifications for C9.3B China NR4

Maximum Power 456 HP 340 kW
Maximum Torque 1540 lb-ft @ 1400 rpm 2088 Nm @ 1400 rpm
Rated Speed 1800-2200 rpm 1800-2200 rpm
Minimum Power 335 HP 250 kW
Emissions China Nonroad Stage IV China Nonroad Stage IV
Engine Configuration In-Line 6 In-Line 6
Bore 4.5 in 115 mm
Stroke 5.9 in 149 mm
Displacement 567.5 in³ 9.3 l
Compression Ratio 17.0:1 17.0:1
Aspiration Turbocharged-Aftercooled (TA) Turbocharged-Aftercooled (TA)
Combustion System Direct Injection Direct Injection
Rotation from Flywheel End Counterclockwise Counterclockwise
Aftertreatment DOC+DPF+SCR DOC+DPF+SCR
Length 44.3 in 1125 mm
Width 31.1 in 791 mm
Height 42 in 1068 mm
Weight - Net Dry - Basic Operating Engine Without Optional Attachments 1907 lb 865 kg
Length 36.4 in 925 mm
Width 27.3 in 694 mm
Height 17 in 432 mm
Weight 211 lb 96 kg

C9.3B China NR4 Standard Equipment

Air Inlet System

  • Turbocharged
  • Air-to-Air Aftercooled
  • Mid-mount turbocharged system with front and rear exhaust configurations

Control System

  • Electronic control system
  • Over-foam wiring harness
  • Automatic altitude compensation
  • Power compensated for fuel temperature
  • Configurable software features
  • Engine monitoring system SAE J1939 broadcast and control
  • Integrated Electronic Control Unit (ECU)
  • Remote fan control

Cooling System

  • Vertical or RH thermostat outlet
  • Centrifugal water pump
  • Guidance on cooling system design available through your dealer to ensure equipment reliability

Flywheels and Flywheel Housing

  • Available SAE 1 power take-off with optional SAE A, SAE B, SAE C power take-off drives. Engine power can also be taken from the front of the engine with optional attachments. (Tier 4 Final, Proposed Stage V)

Fuel System

  • Electronic high pressure common rail
  • Primary fuel filter
  • Secondary and tertiary fuel filters
  • Fuel transfer pump
  • Electronic fuel priming

Lube System

  • Open crankcase ventilation system
  • Oil cooler
  • Oil filler
  • Lube oil filter
  • Oil dipstick
  • Gear driven oil pump
  • Choice of front, rear or center sumps
  • Open crankcase ventilation system with fumes disposal (optional OCV filter system)

Power Take Off (PTO)

  • SAE A, SAE B or SAE C power take off (PTO) drives. Engine power can also be taken from the front of the engine on some applications.


  • Paint: Caterpillar yellow, with optional colors available at request
  • Vibration damper
  • Lifting eyes


  • Clean Emissions Module (CEM) consisting of Diesel Particulate Filter (DPF), Diesel Oxidation Catalyst (DOC) and high-efficiency Selective Catalytic Reduction (SCR)

Tier 4 Final, Proposed Stage V Aftertreatment

  • Pump Electronic Control Unit (PETU)
  • Available in 12V or 24V systems

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