250-7700 S310CG080 Turbocharger for Caterpillar 330D 336D 340D M330D Cat C9 Engine

250-7700 S310CG080 Turbocharger for Cat C9 Engine

The 250-7700 turbocharger is a direct replacement for Caterpillar C9 engine turbocharger applications. Designed to match or exceed OEM specifications, this S310CG080-based turbocharger group serves Caterpillar 330D, 336D, 340D, and M330D excavator models equipped with the C9 9.0L diesel engine. 

Compatible part numbers include 10R-2858, 10R-2969, 175210, 475210, and 13809880113. Please verify your existing turbocharger label and physical dimensions before ordering, as turbocharger configurations may vary by engine rating and machine serial number.

Technical Specifications and Fitment Notes

Common Failure Symptoms

• The engine loses power under load.

• Black smoke appears because of low boost pressure or poor air supply.

• Blue smoke appears when oil enters the intake or exhaust side.

• Whistling, scraping or abnormal noise comes from the turbocharger area.

• Oil leakage appears near the compressor housing, turbine housing or oil return pipe.

• The turbo shaft has excessive radial or axial play.

• Boost pressure remains lower than expected after the engine is under load.

Troubleshooting Before Replacement

Before replacing the 250-7700 turbocharger, inspect the complete intake, exhaust and lubrication system. A turbocharger failure can be caused by poor oil supply, dirty air filtration, intake leakage, exhaust restriction or excessive crankcase pressure.

• Check the air filter, intake hose and intercooler pipe for blockage or leakage.

• Inspect oil feed and oil return lines for carbon blockage, restriction or leakage.

• Check coolant line condition if the removed unit uses water-cooling connections.

• Check engine oil quality and confirm the correct oil change interval.

• Inspect the exhaust manifold and gasket area for leakage before the turbine side.

• Check whether foreign object damage is present on compressor or turbine blades.

• Confirm that crankcase pressure is not excessive before installing a replacement turbocharger.

Installation and Maintenance Notes

• Clean or replace oil feed and oil return lines before installing the replacement turbocharger.

• Pre-lubricate the turbocharger with clean engine oil before first start.

• Replace damaged gaskets and check that all flanges sit flat.

• Do not use sealant that may enter the oil passage, coolant passage or exhaust side.

• After installation, idle the engine briefly to confirm oil supply before applying load.

• Check for oil leakage, coolant leakage, exhaust leakage, abnormal noise and boost pressure after installation.

• Allow the engine to idle briefly before shutdown after heavy load operation to protect the turbocharger bearing system.