Cat® C9.3B Diesel Engine

C9.3 ACERT Tier 4 Diesel Engines - Highly Regulated

Cat® C9.3B Diesel Engine

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 and EU Stage V 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.

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Product Specs

Engine Dimensions - Approximate

Weight - Net Dry - Basic Operating Engine Without Optional Attachments
865 kg (1907 lb)
1125 mm (44.3 in)
1068 mm (42 in)
791 mm (31.1 in)


Lube System - Refill
30 L (31.7 qts)
Rotation from Flywheel End
Cooling System - Capacity
22 L (23.6 qts)
Combustion System
Direct Injection
Compression Ratio
9.3 L (567.5 in³)
Turbocharged-Aftercooled (TA)
115 mm (4.53 in)
149 mm (5.87 in)
Engine Configuration
In-Line 6, 4-Stroke-Cycle Diesel

Emission Standards

U.S. EPA Tier 4 Final and EU Stage V Nonroad Emission Standards.

Power Rating

Rated Speed
1800-2200 rpm
Minimum Power
Maximum Power

Aftertreatment Dimensions - Approximate

432 mm (17.0 in)
694 mm (27.3 in)
96 kg (211 lb)
925 mm (36.4 in)


  • 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.
  • General
    • Paint: Caterpillar yellow, with optional colors available at request
    • Vibration damper
    • Lifting eyes
  • Tier 4 Final, Proposed Stage V Aftertreatment
    • Clean Emissions Module (CEM) consisting of Diesel Particulate Filter (DPF), Diesel Oxidation Catalyst (DOC) and high-efficiency Selective Catalytic Reduction (SCR)
    • Pump Electronic Control Unit (PETU)
    • Available in 12V or 24V systems

Optional Equipment

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