3512C (HD) Well Stimulation Engine

3512C (HD) Well Stimulation Engine

Well stimulation operations in the oilfield are complex and demanding. The 3512C (HD) engine for well stimulation operations was specifically developed to reach the highest power nodes while meeting the highest standards in 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) engines, with ratings: 1603-1864 bkW (2150-2500 bhp) @ 1900 rpm meet IMO Tier II, China Stage III, U.S. EPA Marine Tier 2, and U.S. EPA Non-road Tier 2 equivalent emission standards. They are available using U.S. EPA and EU Flexibility, and for other regulated and non-regulated areas.

  • Maximum Rating 2500 BHP

  • Emissions Non-current EPA Tier 2 and China Stage III

  • Displacement 3596 in³

  • Minimum Rating 2250 BHP

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Product Specifications


General Specifications

  • Aspiration Turbocharged-Aftercooled

  • Bore 6.7in

  • Displacement 3596in³

  • Flywheel Teeth 151

  • Flywheel and Flywheel Housing SAE No. 0

  • Maximum Rating 2500BHP

  • Minimum Rating 2250BHP

  • Stroke 8.5in


  • Emissions Non-current EPA Tier 2 and China Stage III


  • Height 86.1in

  • Length 113.8in

  • Weight 14145lb

  • Width 64.2in



Standard Equipment

  • Heavy-duty air cleaners (dual element/service indicator)

  • Four center-mounted turbochargers

  • Cat® ADEM A3 ECU — LH

  • With electronic fuel injector fuel system (10 amp DC power required to drive electronic engine control module)

  • Separate Circuit SCAC system

  • Torque converter connections

  • Thermostats and housing, jacket and separate circuit water pump, gear-driven centrifugal

  • Land well service engine

  • Flywheel, SAE No. 0, 151 teeth

  • Flywheel housing, SAE No. 0

  • Primary fuel filter

  • Fuel priming pump

  • Fuel filter — RH spin-on type

  • Fuel transfer pump

  • Electronically controlled unit injectors

  • No standard instrumentation

  • Optional, remote instrumentation available

  • Service meter

  • 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

  • Trunion front support

  • Accessory drive — lower LH

  • Front housing — two-sided

  • 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

  • Paint — Cat yellow

  • Vibration damper and guard

  • Lifting eyes

Optional Equipment

  • Charging alternators

  • Local speed throttle control

  • Throttle position sensors

  • Governor conversion

  • Coolant regulator conversion

  • Water level switch gauge

  • Coolant level sensors and coolant conditioner

  • Flexible exhaust fitting

  • Elbows, flange, exhaust adapters

  • Manifold and mufflers

  • Flexible fuel lines

  • Water/fuel separator

  • Fuel level switch

  • Remote panel display and remote cylinder temperature display

  • Gauges and instrument panels

  • Oil pans and filters

  • Deep sump oil pan and front sump pan

  • Front crankshaft adapter

  • Flywheel stub shaft

  • Sensors

  • Shutoff controls

  • Air starting motors

  • Electric starting motors

  • Hydraulic starter

  • Ether starting aids

  • Battery sets — 24V

  • Battery cable and battery rack