Lean-burn engines operate with large amounts of excess air. The excess air absorbs heat during combustion reducing the combustion temperature and pressure, greatly reducing levels of NOx. Lean-burn design also provides longer component life and excellent fuel consumption.

ADEM A3 control system providing integrated ignition, speed governing, protection, and controls, including detonation-sensitive variable ignition timing. ADEM A3 has improved: user interface, display system, shutdown controls, and system diagnostics.

Side covers on block allow for inspection of internal components

Large variety of factory-installed engine attachments reduces packaging time

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

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.

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 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

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

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

• A3 ECU
• Air-fuel ratio control

• Thermostats and housing
• Jacket water pump
• Aftercooler water pump
• Aftercooler core for sea-air atmosphere
• Aftercooler thermostats and housing

• Watercooled exhaust manifolds

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

• Gas pressure regulator
• Natural gas carburetor

• A3 ECU

• PL1000 Advisor panel

• Crankcase breather — top mounted
• Oil cooler
• Oil filter — RH
• Oil bypass filter
• Oil pan — shallow
• Oil sampling valve
• Turbo oil accumulator

• Rails, engine mounting — 254 mm (10 in)

• Electronic shutoff system
• Gas shutoff valve

• Paint — Cat yellow
• Vibration damper and guard — dual 484 mm (23 in)

• Battery chargers
• Charging alternators

• Aftercooler core
• Thermostatic valve
• Temperature switch
• Connections
• Expansion and overflow tank
• Water level switch gauge

• Flexible fittings
• Elbows
• Flange
• Flange and exhaust expanders
• Rain cap
• Mufflers

• Low pressure gas conversions
• Propane gas valve and jet kits
• Fuel filter

• PL1000 communications modules

• Oil bypass filter removal and oil pan accessories
• Sump pump
• Air prelube pump
• Manual prelube pump
• Lubricating oil

• Rails
• Vibration isolators

• Front accessory drives
• Auxiliary drive shafts and pulleys
• Front stub shaft
• Pulleys

• Explosion relief valves, status control box interconnect wiring harness

• Air starting motor
• Air pressure regulator
• Air silencer
• Electric air start controls
• Electric starting motors — dual 24-volt
• Starting aids
• Battery sets (24-volt dry), cables, and rack

• Flywheel intertia weight
• Guard removal
• Engine barring group
• Premium 8:1 pistons
• Premium cylinder heads