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3512C (HD) Offshore Well Stimulation Engine

3512C (HD) Offshore Well Stimulation Engine

The 3512C (HD) offshore engine for well stimulation operations was specifically developed to operate in harsh environments offshore while meeting the highest standards in performance, durability, reliability, and emissions. Cat engines are backed by the worldwide network of Cat dealers ready to support your operation with technical support, service, parts, and warranty. 3512C (HD) offshore engines, with ratings: 1678-1864 bkW (2250-2500 bhp) @ 1900 rpm meet IMO Tier II and U.S. EPA Marine Tier 2 emission standards.

General Specifications

Maximum Rating




Minimum Rating




Flywheel and Flywheel Housing

SAE No. 0

Flywheel Teeth








IMO Tier II and EPA Marine Tier 2










Standard Equipment:

  • Air Inlet System
    • Heavy-duty air cleaners (dual element/service indicator)
    • Four center-mounted turbochargers
  • Control System
    • Cat® ADEM A3 ECU — LH
    • With electronic fuel injector fuel system (10 amp DC power required to drive electronic engine control module)
  • Cooling System
    • Separate Circuit SCAC system
    • Torque converter connections
    • Thermostats and housing, jacket and separate circuit water pump, gear-driven centrifugal
  • Exhaust System
    • Land well service engine
    • Exhaust manifold, dry, slip joint with stainless steel wire seal
    • Four turbochargers with watercooled bearings (center mounted)
    • Exhaust outlet, dual 203 mm (8 in) round flange
  • Flywheel And Flywheel Housings
    • Flywheel, SAE No. 0, 151 teeth
    • Flywheel housing, SAE No. 0
  • Fuel System
    • Primary fuel filter
    • Fuel priming pump
    • Fuel filter — RH spin-on type
    • Fuel transfer pump
    • Electronically controlled unit injectors
  • Instrumentation
    • No standard instrumentation
    • Optional, remote instrumentation available
    • Service meter
  • Lube System
    • Crankcase breather — top mounted
    • Oil cooler
    • Oil filler and dipstick — LH
    • Oil pump
    • Oil filter — RH spin-on type
    • Rear sump oil pan — 250-hour change interval
    • Oil pan drain valve — 1" NPT female connection
    • Fumes disposal
    • Scavenger pump
  • Mounting System
    • Trunion front support
  • Power Take-offs
    • Accessory drive — lower LH
    • Front housing — two-sided
  • Protection System
    • ADEM A3 ECU system to provide customer programmable engine deration strategies to protect against adverse operating conditions
    • Emergency stop logic inputs provided at 40-pin customer interface connection
    • Dual air inlet shutoff
    • Oil pressure monitor
  • General
    • General
    • Vibration damper and guard
    • Lifting eyes

Optional Equipment:

  • Charging System
    • Charging alternators
  • Control System
    • Local speed throttle control
    • Throttle position sensors
    • Governor conversion
  • Cooling System
    • Coolant regulator conversion
    • Water level switch gauge
    • Coolant level sensors and coolant conditioner
  • Exhaust System
    • Flexible exhaust fitting
    • Elbows, flange, exhaust adapters
    • Manifold and mufflers
  • Fuel Systems
    • Flexible fuel lines
    • Water/fuel separator
    • Fuel level switch
  • Instrumentation
    • Remote panel display and remote cylinder temperature display
    • Gauges and instrument panels
  • Lube System
    • Oil pans and filters
    • Deep sump oil pan and front sump pan
  • Power Take-offs
    • Front crankshaft adapter
    • Flywheel stub shaft
  • Protection System
    • Sensors
    • Shutoff controls
  • Starting System
    • Air starting motors
    • Electric starting motors
    • Hydraulic starter
    • Ether starting aids
    • Battery sets — 24V
    • Battery cable and battery rack

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