Cat® 3406C Fire Pump Engine

3406C Fire Pump

Cat® 3406C Fire Pump Engine

The Cat® 3406C Industrial Diesel Fire Pump Engine is offered in ratings ranging from 218-359 bkW (292-482 bhp) @ 1750-2300 rpm. These ratings are non-certified and available for global non-regulated areas. They are FM Approved and UL Listed. Additional 3406C ratings with or without radiators are available, but not FM approved or UL listed. Starting on demand is a must for a fire pump engine – always. Cat® fire pump engines have a reputation for reliable starts and long efficient service.

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Product Specs

Emission Standards

Non-Certified. Available for global non-regulated areas. FM Approved, UL Listed

Power Rating

Rated Speed
1750-2300 rpm
Maximum Power
Minimum Power


Engine Configuration
Inline 6, 4-Stroke-Cycle Diesel
137.2 mm (5.4 in)
165.1 mm (6.5 in)
14.6 L (893 in³)
Cooling System - Capacity
32.2 L (34 qt)
Lube System - Refill
34.1 L (36 qt)
Rotation from Flywheel End
Compression Ratio
Turbocharged Aftercooled


  • Air Inlet System
    • Dry or watercooled manifold and turbocharger
  • Charging System
    • Charging Alternator, 24 volt, 35 amp
  • Control System
    • Hydra-mechanical governor
  • Cooling System
    • Thermostats and housing
    • Jacket water pump, gear driven, centrifugal
    • Heat exchanger
    • Expansion tank
    • FM Required Raw Water Cooling Loops: 1.5" iron, horizontal or vertical, 1.5" 316 stainless steel, horizontal or vertical
    • Optional Radiator, not UL listed or FM approved
  • Exhaust System
    • Exhaust manifold, water-cooled (wet) or dry
    • Exhaust elbow, dry, 152 mm (6 in), 4 bolt flange
  • Flywheels And Flywheel Housing
    • SAE No. 1 flywheel
    • SAE No. 1 flywheel housing
    • SAE standard rotation
  • Fuel System
    • Fuel filter, LH
    • Fuel transfer pump
    • Primary fuel filter / water separator
  • Instrumentation
    • Instrument panel, LH
    • Engine oil pressure gauge
    • Fuel pressure gauge
    • Water temperature gauge
    • Service meter
  • Lube System
    • Crankcase breather
    • Oil cooler
    • Lube oil filter
    • Oil filler in valve cover and dipstick, both RH
    • Rear sump oil pan
    • Oil filler in valve cover
    • Dipstick
  • Mounting System
    • Supports
  • Power Take-offs
    • Flywheel stub shaft
  • Protection System
    • Stop-Start System, automatic (compatible with NFPA 20 requirements, able to be energized from either of two battery sources and capable of manual starter actuation)
  • General
    • Vibration damper and guard
    • Lifting eyes
    • Paint - fire pump red, optional radiator painted black

Optional Equipment

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