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Turbocharger for Loaders, 6690633

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Turbocharger for Loaders, 6690633

Turbocharger for Loaders, 6690633 for replacement engine 6686497 or 6686497REM.

Bobcat turbochargers force air into the cylinders, helping the engine produce more power. The air is filtered through the pipes and components of the turbocharger, giving you quieter and smoother engine noise.

There are three main failure modes for turbochargers:

Turbo shaft fault

  • Potential Causes: poor lubrication, foreign material from intake air, defective shaft/bearing, oil leak from shaft bearing
  • Symptoms: No engine power, fluctuating rpm, hard starting, black smoke, noise from turbo

Poor/faulty waste-gate actuator (stuck wastegate, broken wastegate linkage)

  • Potential Causes: Foreign material from intake air, abnormal blow-by-gas, defective actuator
  • Symptoms: No engine power, fluctuating rpm, black smoke, emission control fail

Intake air/exhaust gas leaking

  • Potential Causes: Damaged hoses & clamps, faulty gaskets, faulty turbo shaft bearing/seal
  • Symptoms: No engine power, fluctuating rpm, black smoke, emission control fail, noise of air/gas leaking
When replacing a turbocharger always prime the turbo with clean engine oil and rotate by hand prior to completing installation.

Also available as a Remanufactured Turbocharger, 6690633REM

Parts can vary depending on your serial number. Check the Bobcat Online Parts Catalog to ensure the correct part for your equipment.

More Information

WARNING: This product can expose you to chemicals including lead and lead compounds, mineral oils, and phthalates which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to