336 Excavator


Power Systems

  • Specs Summary

Cat® G3520, G3520B Industrial Gas Engine

The Cat® G3520 and G3520B Industrial Gas Engines are offered in the following ratings: 1104 bkW (1480 bhp) @ 1200 rpm and 1286 bkW (1725 bhp) @ 1400 rpm. These ratings are NSPS site compliant capable with customer-supplied aftertreatment. For specific emission information, please consult your local Cat Dealer.

Standard Equipment

Air Inlet System

  • Axial Flow Air cleaner
  • Cleanable
  • Intermediate-duty with service indicator

Control System

  • ADEM A3 with integrated electronic throttle control
  • Control panel

Cooling System

  • Two-stage charge air cooling
  • Thermostats and housing
  • Engine-driven jacket and aftercooler water pump
  • Stainless steel aftercooler cores

Exhaust System

  • Dry exhaust manifolds
  • Dry exhaust elbow

Flywheels and Flywheel Housings

  • SAE No. 00 flywheel
  • SAE No. 00 flywheel housing
  • SAE standard rotation

Fuel System

  • 7-50 psi gas supply
  • Fuel system is sized for 800 to 1200 btu/scf (31.5 to 47.2 MJ/Nm3)
  • Electronic fuel metering valve
  • Gas pressure regulator
  • Gas shutoff valve (GSOV)

Ignition System

  • ADEM A3

Lubrication System

  • Crankcase breather — top mounted
  • Oil cooler
  • Oil filter — RH
  • Oil pan — 143 gal
  • Drain valve
  • Oil sampling valve
  • Turbo oil accumulator

Mounting System

  • Engine mounting rails - 330.2 mm (13 in) industrial-type

Power Take-Offs

  • Front housing — two-sided
  • Front lower LH, RH, and upper RH accessory drives

General

  • Paint — Cat yellow
  • Crankshaft vibration damper and guard
  • CSA Certification, Class 1 Division 2, Group D - electrical system and instrumentation - includes ADEM A3 and control panel

Optional Equipment

Air Inlet System

  • Round air inlet adaptors

Charging System

  • Charging alternator - CSA approved 24V, 65 A

Cooling System

  • Flexible connections

Exhaust System

  • Flexible fittings
  • Flange and expander

Fuel System

  • Gas filter

Instrumentation

  • Communications module

Lubrication System

  • Lubricating oil
  • Oil bypass filter
  • Air prelube pump

Power Take-Offs

  • Front stub shaft
  • Pulleys
  • Double damper

Protection System

  • Explosion relief valves
  • Secondary GSOV

Starting System

  • Air starting motor with controls (90 psi or 150 psi)
  • API B16.3 compliant piping
  • Jacket water heater
  • Barring group

General

  • Special paint
  • Torsional vibration analysis

EU Certification

  • EEC DOI certification

Support

  • Factory commissioning