G3406 Gas Compression Engine

G3406 Gas Compression Engine

Tough and durable, built on the industry-standard G3400 platform bring maximum uptime and low operating cost to your operation. G3406 engines meet the most demanding continuous duty gas compression applications ...
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Engine Specifications

Maximum Rating
NSPS Site Compliant Capable
Minimum Rating
Compression Ratio
Naturally Aspirated or Turbocharged-Aftercooled
Rotation from Flywheel End
Flywheel and Flywheel Housing
SAE No. 1
Flywheel Teeth
Weight - Dry
Oil Change Interval
750 hours
Ignition, Protection
Altronic III

Capacity for Liquids

Cooling System
10gal (US)
Lube Oil System - Refill
20gal (US)


Rich burn engine design easily meets emission requirements - 0.5% O2 rating meets U.S. EPA Spark Ignited Stationary NSPS Emissions for 2007/8 and 2010/11 with the use of aftermarket AFRC and TWC

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 web-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:

Optional Equipment:

    Air Inlet System
    • Precleaner
    Charging System
    • Battery chargers
    • Charging alternators
    • Charging alternators f/u/w c customer supplied shutoffs
    • Ammeter gauge
    • Ammeter gauge and wiring
    • Control mounting
    Control System
    • PSG Woodward governor
    Cooling System
    • Radiators
    • Non-sparking blower fan
    • Blower fans for customer supplied radiators
    • Fan drives for customer supplied radiators
    • ATAAC conversion
    • Aftercooler
    • Expansion tank
    • Heat exchangers
    Exhaust System
    • Flexible fittings
    • Elbow
    • Flange
    • Pipe
    • Rain cap
    • Muffler
    Fuel System
    • Fuel filter
    • Natural gas valve and jet kits
    Ignition System
    • CSA shielded ignition
    • Wiring harness
    • Gauges and instrument panels
    Lube System
    • Auxiliary oil reservoir removal
    • Lubricating oil
    Mounting System
    • Vibration isolators
    Power Take-offs
    • Auxiliary drive pulleys
    • Enclosed clutch and clutch support
    • Front stub shaft and flywheel stub shaft
    Protection System
    • Gas valves
    Starting System
    • Air starting motor
    • Electric air start control
    • Air pressure regulator
    • Air silencer
    • Electric starting motor— single 12- and 24-volt
    • Starting aids
    • Battery sets, cables, and rack
    • Damper guard