Caterpillar каталог.

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Worn bearings, bearing bores, and journals

Probable Cause

• A restriction exists in the tube between the air filter and the turbocharger.
  The component must be repaired or replaced.
• A restriction exists in the exhaust system.
  The component must be repaired or replaced.
• The turbocharger is loose or the clamps and bolts on the turbocharger are loose.
  Correctly position the turbocharger and tighten the clamps and bolts.
• The flow of the engine oil is delayed to the turbocharger when the engine is started. Insufficient oil flows to the turbocharger when the engine is running.
  Check the following components for correct operation:
  • Engine oil pump
  • Engine oil bypass valve
  • Engine oil filter
  • Viscosity of the engine oil
  • Restrictions in oil lines
• The engine oil is dirty.
  Drain the engine oil. Install the correct type of engine oil. Replace the engine oil filter.
• The incorrect type of engine oil is installed.
  Drain the engine oil. Replace the engine oil filter. Install the correct type of engine oil.
• The oil supply line from the engine oil pan is restricted.
  The oil supply line must be repaired or replaced.
• The engine rpm increases too rapidly when the engine is started.
  Check the fuel injection pump for correct operation and settings.
• The period of time at high idle is insufficient.
  Check the fuel injection pump for correct operation and settings.
• engine oil is leaking from the oil supply line.
  The oil supply line must be repaired or replaced.
• A restriction exists in the engine oil filter.
  Clean the engine oil filter base and the housing for the engine oil filter. Check the operation of the engine oil bypass valve. Replace the engine oil filter.
• The engine stopped too soon from a high load condition.
  Check the following components for correct operation or damage:
  • Compressor impeller of the turbocharger
  • Coolant system
  • Fuel injection pump
  • Air/fuel ratio control
  • Valve lash
  • Fuel injection nozzles