Tough and durable, built on the industry-standard G3400 platform bring maximum uptime and low operating cost to your operation. G3408 engines meet the most demanding continuous duty gas compression applications with virtually no unscheduled downtime.Ideal applications for G3408 engines include gas lift, gas gathering, and wellhead gas compression. Cat G3408 gas engine. Ratings: 190-298 bkW (255-400 bhp) @ 1800 rpm are NSPS site compliant capable with customer-provided air-fuel ratio control and aftertreatment or available for non-regulated areas.
Features
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Engine Design
– Improved 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
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Full Range of Attachments
Large variety of factory-installed engine attachments reduces packaging time
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Testing
Every engine is full-load tested to ensure proper engine performance.
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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.
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Product Support Offered Through Global Cat Dealer
More than 2,200 dealer outletsCat factory-trained dealer technicians service every aspect of your petroleum engineCat parts and labor warrantyPreventive maintenance agreements available for repairbefore-failure optionsS•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
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Over 80 Years of Engine Manufacturing Experience
Over 60 years of natural gas engine productionOwnership 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
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Web Site
For all your petroleum power requirements, visit www.cat.com/oilandgas.
Specifications
Units for specifications
Engine Specifications
| Maximum Rating | 400.0 BHP 298.0 bkW |
|---|---|
| Rated Speed | 1800 rpm 1800 rpm |
| Emissions | Rich Burn: Standard Emissions for Export Only |
| Minimum Rating | 255.0 BHP 190.0 bkW |
| Compression Ratio | 9.7:1 |
| Aspiration | Naturally Aspirated or Turbocharged - Aftercooled |
| Rotation from Flywheel End | Counterclockwise |
| Flywheel and Flywheel Housing | SAE No. 0 |
| Flywheel Teeth | 136 |
| Displacement | 1099 in³ 18 l |
| Oil Change Interval | 750 hours |
| Ignition, Protection | Altronic III |
| Stroke | 6.0 in 152.0 mm |
| Bore | 5.4 in 137.0 mm |
| Length | 68 in 1738 mm |
| Width | 52 in 1312 mm |
| Height | 61 in 1542 mm |
| Weight - Dry | 4500 lb 2041 kg |
Capacity for Liquids
| Cooling System | 14.5 gal (US) 54.9 l |
|---|---|
| Lube Oil System - Refill | 12.2 gal (US) 46.2 l |
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