The line of G3500B engines brings versatility, uptime, and low operating cost to your gas compression operation. They deliver the lowest engine-out emissions in the industry without sacrificing performance. Ideal applications for G3500B engines include gas lift, gas gathering, and wellhead gas compression. Cat G3508B gas engine. Ratings: 1029 bkW (1380 bhp) @ 1400 rpm are NSPS site compliant capable.

Engine Specifications
Minimum Rating 1380 BHP
Maximum Rating 1380 BHP
Emissions NSPS Site Compliant Capable
Displacement 4230 in³
Aspiration Turbocharged-2 Stage Aftercooled
Flywheel and Flywheel Housing SAE No. 00
Flywheel Teeth 183
Weight - Dry 18520 lb
Oil Change Interval 1000 hr
Ignition, Protection ADEM™ A3
Stroke 7.5 in
Bore 6.7 in

Capacity for Liquids
Cooling System 58.5 gal (US)
Lube Oil System - Refill 112 gal (US)

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


- Meets U.S. EPA Spark Ignited Stationary NSPS emissions for 2010 - Lean air/fuel mixture provides best available emissions and fuel efficiency for engines of this bore size

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.


Every engine is full-load tested to ensure proper engine performance.

Gas Engine Rating Pro

GERP is a PC-based program designed to provide site performance capabilities for Cat® natural gas engines for the gas compression industry. GERP provides engine data for your site's altitude, ambient temperature, fuel, engine coolant heat rejection, performance data, installation drawings, spec sheets, and pump curves.

Product Support Offered Through Global Cat Dealer

More than 2,200 dealer outlets Cat factory-trained dealer technicians service every aspect of your petroleum engine Cat parts and labor warranty Preventive maintenance agreements available for repairbefore- failure options S•O•SSM program matches your oil and coolant samples against Caterpillar set standards to determine: - Internal engine component condition - Presence of unwanted fluids - Presence of combustion by-products - Site-specific oil change interval

Over 80 Years of Engine Manufacturing Experience

Over 60 years of natural gas engine production Ownership of these manufacturing processes enables Caterpillar to produce high quality, dependable products - Cast engine blocks, heads, cylinder liners, and flywheel housings - Machine critical components - Assemble complete engine

Web Site

For all your petroleum power requirements, visit www.catoilandgasinfo.com.

Web Site

For all your petroleum power requirements, visit www.catoilandgasinfo.com.

Standard Equipment

Air Inlet System
  • Axial flow air cleaners
  • Service indicator
  • Cleanable
Cooling System
  • Two-stage charge air cooling:
  • Engine cooling and charge air cooling thermostats
Exhaust System
  • Dry exhaust manifolds and turbocharger housings
Flywheels and Housings
  • SAE 00 flywheel
  • SAE 00 flywheel housing
  • SAE standard rotation
Fuel System
  • Electronic fuel metering valve
  • Requires 7-50 psig gas supply
  • Gas pressure regulator
  • Gas shutoff valve
  • Remote-mounted Advisor control panel
  • Interconnect harness
Lube System
  • Top-mounted crankcase breathers
  • Oil cooler
  • Oil filter and oil sampling valve
  • Drain valve
  • Turbo oil accumulator
  • API B16.3 approved gas/air-driven pre-lube system
Torsional Vibration Analysis
  • Caterpillar provided
  • Rails
Control Panels
  • 4" LCD Advisor display panel
  • Shipped loose
Starting System
  • 90 psi TDI starter
  • 150 psi TDI starter
Power Take-Offs
  • Front housing, two sided
  • Front lower LH accessory drive
Protection System — Display/Alarm/Shutdown
  • Low oil pressure
  • Oil filter differential pressure
  • High fuel or oil temperature
  • Engine oil to engine coolant
  • Differential temperature
  • High coolant temperature
  • Engine speed
  • Engine load
  • Battery voltage
  • Detonation
  • Manifold air temperature
  • Coolant JW inlet/outlet pressure
  • Left turbo inlet temperature
  • Right turbo inlet temperature
  • Cylinder port temperature
Protection System — Display Only
  • Service hours
  • Oxygen level
  • Paint — Cat yellow
  • Dual 23" vibration damper with guard
  • CSA Certification, Class 1 Division 2 Groups C and D

Optional Equipment

Air Inlet System
  • Rectangular air inlet adapter
  • Circular air inlet adapter
Charging System
  • Battery Charger 20 amp
  • Mechanical joint assembly
  • Inlet connection
Exhaust System
  • Flexible fittings available at first production build
  • Elbows and mufflers
  • Optional interconnect harness
Lube System
  • Shipped with lube oil
Mounting System
  • Rails
Power Take-Offs
  • Front stub shaft
  • Options available

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