336 Excavator

  • Specs Summary
  • Bore
    137 mm (5.4 in)
  • Stroke
    152 mm (6.0 in)
  • Displacement
    18 L (1099 in³)
  • Minimum Power
    255 bhp (190 bkW)

Cat® G3408 Industrial Gas Engine

The Cat® G3408 Industrial Gas Engine is offered in ratings ranging from 190-317 bkW (255-425 bhp) @ 1800 rpm and 249 bkW (332 bhp) @ 1500 rpm. These ratings are NSPS site compliant capable with customer-supplied aftertreatment. Some ratings also have standard emission settings available for export only. For specific emission information, please consult your local Cat Dealer.

General

  • Bore 137 mm (5.4 in)
  • Stroke 152 mm (6.0 in)
  • Displacement 18 L (1099 in³)
  • Aspiration Naturally Aspirated (NA), Turbocharged Aftercooled (TA)
  • Engine Configuration Engine - Continuous

Power Rating

  • Minimum Power 255 bhp (190 bkW)
  • Maximum Power 425 bhp (317 bkW)
  • Frequency 1500 & 1800 rpm

Engine Dimensions (Approximate. Final dimensions dependent on selected options)

  • Weight, Net Dry 2245 kg (4950 lb)
  • Height 1758 mm (69.2 in)
  • Width 1563 mm (61.5 in)
  • Length 1756 mm (69.1 in)

Standard Equipment

Air Inlet System

  • Air cleaner — single element with service indicator

Control System

  • Governor — Woodward PSG mechanical
  • Governor control — positive locking

Cooling System

  • Thermostats and housing
  • Jacket water pump
  • Aftercooler water pump
  • Aftercooler core

Exhaust System

  • Watercooled exhaust manifolds
  • Dry exhaust elbow

Flywheel & Flywheel Housing

  • SAE No. 0 flywheel
  • SAE No. 0 flywheel housing
  • SAE standard rotation

Fuel System

  • Gas pressure regulator
  • Natural gas carburetor

Ignition System

  • Digital ignition system

Instrumentation

  • Service meter

Lube System

  • Crankcase breather — top mounted
  • Oil cooler
  • Oil filter — RH
  • Auxiliary oil reservoir
  • Rear sump oil pan
  • Oil filler in valve cover and dipstick — RH

Mounting System

  • Engine supports

Protection System

  • Shutoffs

General

  • Paint — Cat yellow
  • Crankshaft vibration damper and drive pulleys
  • Lifting eyes

Optional Equipment

Air Inlet System

  • Air cleaner — dual element
  • Air inlet adapter
  • Precleaner
  • Air cleaner rain cap

Charging System

  • Battery chargers
  • Charging alternators
  • Ammeter gauge
  • Ammeter gauge and wiring
  • Control mounting

Control System

  • EG3P/2301A speed control governor
  • PSG electric governor
  • PSG pneumatic governor

Cooling System

  • Radiators
  • Non-sparking blower fan
  • Blower fan and fan drives for customer suppliedradiators
  • ATAAC conversion
  • Aftercooler
  • Expansion tank
  • Heat exchanger

Exhaust System

  • Flexible fittings
  • Elbows
  • Flanges
  • Rain caps
  • Mufflers
  • Exhaust manifold

Fuel System

  • Dual gas regulator
  • Low energy fuel carburetor
  • Low pressure gas conversion
  • Propane and natural gas valve and jet kits
  • Fuel filter

Ignition System

  • CSA ignition
  • Ignition ground wiring harness
  • Power supply — digital ignition system

Instrumentation

  • Gauges and instrument panels

Lube System

  • Auxiliary oil reservoir removal
  • Lubricating oil

Mounting System

  • Vibration isolators

Power Take-Offs

  • Auxiliary drive pulleys
  • Enclosed clutch
  • Clutch support
  • Front stub shaf
  • Flywheel stub shaft
  • Pulley removal

Protection System

  • Gas valves

Starting System

  • Air starting motor
  • Electric air start control
  • Air pressure regulator
  • Air silencer
  • Electric starting motor — single 24-volt
  • Starting aids
  • Battery sets (24-volt dry), cables, and rack