Caterpillar 3306 Diesel Engine – 11.1L Inline 6, 190–275 HP, Turbocharged

The Caterpillar 3306 diesel engine is a proven powerplant renowned for its durability and consistent performance in generator applications. Built with a 4-stroke, inline 6-cylinder configuration, it has a displacement of 11.1 liters and operates within a broad speed range of 1400 to 2200 RPM. The 3306 comes in both turbocharged and naturally aspirated variants, offering prime power outputs between 190 to 275 HP (142 to 205 kW). Featuring direct injection via a mechanical unit injector system and a heavy-duty cast-iron block and head, this engine is designed for demanding duty cycles including continuous, prime, and standby operations. The water-cooled system, large oil and coolant capacities, and optional cold-weather aids ensure reliable operation in harsh environments. With flexible or rigid mounting options, the CAT 3306 is ideal for both stationary and mobile industrial generator installations.

Specifications:

– Engine Model: Caterpillar 3306
– Engine Type: 4-Stroke, Inline 6-Cylinder, Water-Cooled Diesel
– Displacement: 11.1 Liters (11100 cc)
– Bore x Stroke: 120.65 mm x 152.4 mm (4.75 in x 6.0 in)
– Aspiration: Turbocharged or Naturally Aspirated (model dependent)
– Compression Ratio: 15.3:1 (typical turbo variant)
– Firing Order: 1-5-3-6-2-4
– Injection Type: Direct Injection
– Fuel System: Mechanical Unit Injector
– Rated Power (Prime): 190–275 HP (142–205 kW) @ 1800–2200 RPM
– Max Torque: Approx. 1050 Nm @ 1400 RPM
– Operating Speed Range: 1400 – 2200 RPM
– Governor Type: Mechanical or Electronic
– Duty Cycle: Continuous, Prime, or Standby
– Cooling System: Water-cooled with jacket water pump
– Oil Capacity: 27.5 Liters (approx.)
– Coolant Capacity: 25 Liters (approx.)
– Nominal Oil Pressure: 276–482 kPa (40–70 psi)
– Cooling Fan Drive: Belt-driven
– Starting System: 24V DC Electric Starter Motor
– Charging Alternator: 24V
– Cold Start Aids: Optional Glow Plugs / Intake Heater
– Block Material: Cast Iron
– Cylinder Head: Cast Iron, Crossflow Design
– Valve Configuration: OHV, 2 Valves per Cylinder
– Engine Mounting: Flexible or Rigid
– Fuel Filters: Spin-on Primary & Secondary
– Air Filter: Dry-type, Replaceable Element

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