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336 Excavator

  • Specs Summary

G3608 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 G3608 A4 gas engine with ratings: 1864-1995 bkW (2500-2675 bhp) @ 1000 rpm. NSPS site compliant capable.

Standard Equipment

Air Inlet System

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

Cooling System

  • Jacket water pump
  • Jacket water thermostats and housing
  • Expansion tank
  • Aftercooler/oil cooler pump
  • Aftercooler/oil cooler thermostats and housing
  • Flexible connections
  • Jacket water heater
  • Two-stage aftercooler
  • Jacket water heater connections
  • Standard ANSI connections

Flywheels & Flywheel Housings

  • SAE standard rotation

Ignition System

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

Lube System

  • Crankcase breather — top mounted
  • Oil cooler
  • Oil filter
  • Air or electric motor-driven prelube
  • Oil pan drain valves
  • Duplex oil filter

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


  • Engine barring device
  • Paint — Cat yellow
  • Dual vibration damper with guard
  • Vibration damper

Optional Equipment

Charging System

  • Charging alternators

Control System

  • A4 control system — provides electronic governing integrated with air/fuel ratio control and individual cylinder ignition timing control
  • Custom control system software — available for nonstandard ratings, field programmable using flash memory

Exhaust System

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

Fuel System

  • Fuel filter
  • Gas pressure regulator
  • Flexible connection
  • Gas admission valves -- electronically controlled fuel supply pressure


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

Power Take-Offs

  • Front stub shafts

Starting System

  • Air pressure reducing valve
  • Air starting system