Cat® 3412C Industrial Diesel Fire Pump Engines, with ratings: 476-551 bkW (638-739 bhp) @ 1750-2100 rpm, are non-certified and are available for global non-regulated areas. They are not FM Approved and not 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. The Cat line of fire engine pumps covers a wide range of installations.


Power Rating
Minimum Power 638 BHP
Maximum Power 739 BHP
Rated Speed 1750-2100 rpm

Emission Standards
Emissions Non-Certified. Available for global non-regulated areas. Not FM Approved, Not UL Listed

Engine Configuration V-12, 4-Stroke-Cycle Diesel
Bore 137.2 mm (5.4 in)
Stroke 152.4 mm (6.0 in)
Displacement 27 L (1648 in³)
Aspiration Turbocharged Aftercooled (TA)
Compression Ratio 14.5:1
Rotation from Flywheel End Counterclockwise

Engine Dimensions - Approximate
Height 1413.2 mm (55.6 in)
Length 1999.8 mm (78.7 in)
Weight - Approximate, Net Dry (Basic Operating Engine Without Optional Attachments) 2579 kg (5686 lb)

Reliable, Quiet and Durable Power

World-class manufacturing capability and processes coupled with proven core engine designs assure reliability, quiet operation, and many hours of productive life.

World-class Product Support Offered Through Global Cat Dealer Network

  • Scheduled maintenance, including SOSSM sample
  • Customer Support Agreements (CSA)
  • Caterpillar Extended Service Coverage (ESC)
  • Superior dealer service network
  • Extended dealer service network through the Cat Industrial Service Distributor (ISD) program

Standard Equipment

Air Inlet System
  • Air cleaner, regular duty with service indicators
  • Turbocharged
Cooling System
  • Thermostats and housing
  • Jacket water pump, centrifugal
  • Heat exchanger installed
  • Expansion tank
Control System
  • Charging alternator 24 volt, 35 amp
  • Governor control
  • Hydra-mechanical governor
Exhaust System
  • Exhaust manifold
  • Exhaust elbow, dry. 203 mm (8 in) on all Turbocharged engines and Turbocharged Aftercooled with wet exhaust. 152 mm (6 in) on Turbocharged Aftercooled with dry manifolds.
Flywheels & Flywheel Housings
  • SAE No. 0 flywheel
  • SAE No. 0 flywheel housing
  • SAE standard rotation
Fuel System
  • Fuel filter
  • Fuel transfer pump
  • Primary fuel filter
  • Fuel priming pump
  • Instrument panel, LH
  • Engine oil pressure gauge
  • Fuel pressure gauge
  • Water temperature gauge
  • Tachometer
Lube System
  • Crankcase breather, top mounted
  • Oil cooler
  • Oil filler in valve cover and dipstick, both RH
  • Lube oil filter
  • Rear sump oil pan
Mounting System
  • Supports
Power Take Off
  • Power take-off (PTO) 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)
Starting System
  • 24 volt, LH electric starting motor
  • Jacket water heater (6 kW, 240-480 volt)
  • Paint: Firepump Red
  • Vibration damper and guard
  • Lifting eyes

Feel free to ask a question or share a comment about the information on this page.

To help us answer your question or respond to your comment, please enter your email address.