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336 Excavator

  • Specs Summary

G3612 A4 Gas Compression Engine

G3600 A4 engines provide a wide range of power options to fit your gas compression application. G3600 A4 engines bring the highest uptime in the industry and long operating intervals between overhaul. Operators that use G3600 A4 engines in their fleet enjoy virtually no unscheduled downtime, the right power for their application, the lowest operating costs, and emissions compliance. Ideal applications for G3600 A4 engines include centralized gathering stations, gas processing, transmissions, and storage applications. Cat G3612 A4 gas engine with ratings: 2796-2983 bkW (3750-4000 bhp) @ 1000 rpm. NSPS site compliant capable.

Standard Equipment

Control System

  • A4 control system — provides electronic governing integrated with air/fuel ratio control and individual cylinder ignition timing control

Cooling System

  • Jacket water pump
  • Jacket water thermostats and housing
  • Aftercooler pump
  • Aftercooler water thermostats and housing
  • Two-stage aftercooler

Exhaust System

  • Flexible bellows adapters
  • Exhaust expander
  • Weld flanges
  • Dry wrapped exhaust manifolds
  • Vertical outlet adapter

Flywheel & Flywheel Housing

  • SAE standard rotation

Ignition System

  • A4 control system — senses individual cylinder detonation and controls individual cylinder timing

Mounting System

  • Engine mounting feet (six total)
  • Mounting plates (set of six)

Protection System

  • Electronic shutoff system with purge cycle
  • Crankcase explosion relief valves
  • Gas shutoff valve

Optional Equipment

Air Inlet System

  • Heavy-duty air cleaner with precleaners and rain protection
  • Air cleaner — standard duty Inlet air adapter

Charging System

  • 35 Amp & 65 Amp chargin alternators - CSA approved

Fuel System

  • Fuel filter
  • Gas pressure regulator
  • Flexible connection
  • Low energy fuel system
  • Corrosive gas fuel system
  • Gas admission valves -- electronically controlled fuel supply pressure


  • Remote data monitoring and speed control
  • Compatible with Cat Electronic Technician (ET) and Data View
  • LCD display panel
  • Color HMI display
  • Modbus and Ethernet capable

Lube System

  • Crankcase breathers — top mounted
  • Air or electric motor-driven prelube
  • Oil cooler
  • Duplex oil filter
  • Oil filter
  • Oil pan drain valve
  • RH service
  • Lube oil makeup system

Power Take-Offs

  • Front stub shafts

Starting System

  • Air pressure reducing valve
  • Natural gas starting system
  • Air starting system


  • Engine barring device
  • Paint — Cat yellow
  • Damper guard
  • Vibration dampers