The ADEM A4 system represents the next generation of engine management systems while reducing the number of mechanical components and easing troubleshooting. Features include: • Electronic ignition • Electronic governing/speed control • Start/stop logic • Engine protection and monitoring

Large variety of factory-installed engine attachments reduces packaging time

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 Caterpillar 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 cat.com/oilandgas

• ADEM A4
• Class 1, Division 2, Group C & D and Zone 2

• Jacket water thermostats and housing — full open temperature 98°C (208°F)
• Jacket water pump — gear driven, centrifugal, non-self-priming
• Aftercooler water pump — gear driven, centrifugal, non-self-priming
• Aftercooler core — for treated water and sea air atmosphere

• Exhaust manifolds — watercooled
• Exhaust elbow — dry 203 mm (8 in)

• Flywheel, SAE No. 14 or 18
• Flywheel housing, SAE No. 0
• SAE standard rotation

• Gas pressure regulator
• Natural gas carburetor

• Crankcase breather — top mounted
• Oil cooler
• Oil filter — RH
• Oil filler in valve cover, dipstick — RH

• ADEM A4 protection
• The following include alarm and shutdown:
• The following is display only

• Paint, Caterpillar yellow
• Crankshaft vibration damper and drive pulleys
• Lifting eyes
• Cylinder block inspection covers

• Exhaust flex fitting
• Exhaust elbow
• Exhaust flange — ANSI

• Operator interface panel
• Operator interface panel enclosure
• 15', 20', 50' interconnect harness

• Air pressure regulator
• Air start silencer
• Vane starter
• Electric starter
• Turbine starter

• Fuel filter

• Precleaner
• Rain cap