3512C HD (Offshore)

Request Info

Contact Us For Price


Maximum Rating2500 BHP (1864 bkW)
EmissionsIMO Tier II and EPA Marine Tier 2
Displacement58.9 in³ (3596 l)
Minimum Rating2250 BHP (1678 bkW)
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.


Maximum Rating2500 BHP (1864 bkW)
EmissionsIMO Tier II and EPA Marine Tier 2
Displacement58.9 in³ (3596 l)
Minimum Rating2250 BHP (1678 bkW)
Length113.8 in (2880 mm)
Width64.2 in (1630 mm)
Height86.1 in (2185 mm)
Weight14145 lb (6416 kg)
Flywheel and Flywheel HousingSAE No. 0
Flywheel Teeth151
Stroke8.5 in (215 mm)
Bore6.7 in (170 mm)

Benefits and Features

Separate Circuit Aftercooler (SCAC)

Integration with engine cooling system allows ease of installation and a tighter overall engine package

ADEM A3 engine management system integrates speed control, air/fuel ratio control and ignition/detonation controls into a complete engine management system with integrated digital ignition, engine protection and monitoring

For any petroleum application, trust Caterpillar to meet your project needs with custom factory generator sets and mechanical packages. Cat engines, generators, controls, radiators, and transmissions can be custom designed and matched in collaboration with our local dealers to create unique solutions. Custom packages are globally supported and are covered by a one year warranty after startup.

Large variety of factory-installed engine attachments reduces packaging time

Every engine is full-load tested to ensure proper engine performance

- More than 2,200 dealer outlets - Cat factory-trained dealer technicians service every aspect of your petroleum engine - Cat parts and labor warranty - Preventive maintenance agreements available for repairbefore-failure options - S•O•SSM program matches your oil and coolant samples against Caterpillar set standards to determine: • Internal engine component condition • Presence of unwanted fluids • Presence of combustion by-products • Site-specific oil change interval

- Ownership of these manufacturing processes enables Caterpillar to produce high quality, dependable products. • Cast engine blocks, heads, cylinder liners, front and flywheel housings • Machine critical components • Assemble complete engine

For all your petroleum power requirements, visit www.cat.com/oilandgas

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
  • 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, 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
  • General
  • 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