G3520/G3520B

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Overview

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.

Power Rating

Units:
Minimum Power 1480.0 bhp 1104.0 bkW Less
Maximum Power 1725.0 bhp 1286.0 bkW Less
Frequency 1200-1400 rpm 1200-1400 rpm Less

General

Bore 170 mm (6.7 in) 170 mm (6.7 in) Less
Stroke 190 mm (7.5 in) 190 mm (7.5 in) Less
Displacement 86.3 L (5263 in³) 86.3 L (5263 in³) Less
Engine Configuration Engien - Continuous Engien - Continuous Less

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

Weight, Net Dry 11168 kg (24622 lb) 11168 kg (24622 lb) Less
Height 2385 mm (94 in) 2385 mm (94 in) Less
Width 1755 mm (69 in) 1755 mm (69 in) Less
Length 4180 mm (164 in) 4180 mm (164 in) Less

Emissions

Ratings are NSPS site compliant capable with customer-supplied aftertreatment. For specific emission information, please consult your local Cat Dealer.

Engine Design

  • Built on G3500 LE proven reliability and durability
  • Ability to burn a wide spectrum of gaseous fuels
  • Robust diesel strength design prolongs life and lowers owning and operating costs
  • Broad operating speed range at lower site air densities (high altitude/hot ambient temperatures)
  • Higher power density improves fleet management
  • Quality engine diagnostics
  • Detonation-sensitive timing control for individual cylinders

Ultra Lean Burn Technology (ULB)

ULB technology uses an advanced control system, a better turbo match, improved air and fuel mixing, and a more sophisticated combustion recipe to provide: - Lowest engine-out emissions - Highest fuel efficiency - Improved altitude and speed turndown - Stable load acceptance and load rejection

Advanced Digital Engine Management

ADEM A3 engine management system integrates speed control, air/fuel ratio control, and ignition/detonation controls into a complete engine management system. ADEM A3 has improved: user interface, display system, shutdown controls, and system diagnostics.

Full Range of Attachments

Large variety of factory-installed engine attachments reduces packaging time.

Quality

Every Cat engine is manufactured to stringent quality standards in order to assure customer satisfaction.

World-class Product Support Offered Through Global Cat Dealer Network

  • Scheduled maintenance, including S•O•SSM sample
  • Customer Support Agreements (CSA)
  • Caterpillar Extended Service Coverage (ESC)
  • Superior dealer service network
  • Extended dealer service network through the Cat Industrial Service Distributor (ISD) program

G3520/G3520B 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

G3520/G3520B 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

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