OPTION AR-HYDRAULIC 5059139 - Caterpillar

An inspection/check of your turbocharger will minimize unscheduled downtime and reduce the chance for potential damage to other engine parts. Turbocharger components require precision clearances and balancing due to operation at high rotational (torsional) speeds. Severe Service Applications can accelerate component wear and may suggest the need to Inspect/Repair/Replace the cartridge at reduced intervals to ensure maximum reliability and retention of the full core.Clean/Inspect/Check
Removal and Installation
For removal and installation, or repair/replacement options of turbochargers, see your Caterpillar dealer. Refer to the Service Manual for this engine or consult your Caterpillar dealer for the procedure and specifications.1. Remove the exhaust outlet and air inlet piping from the turbocharger. Visually check for oil leaks.2. Turn the compressor wheel and turbine wheel by hand. The assembly should turn freely. Inspect the compressor wheel and turbine wheel for contact with the turbocharger housing. There should NOT be any visible signs of contact between the turbine or compressor wheel and the turbocharger housing. If there is any indication of contact between the rotating wheel(s) and the housing, the turbocharger should be reconditioned or replaced.3. Check the compressor wheel for cleanliness. If only the blade side of the wheel is dirty, dirt and/or moisture is passing through the air filtering system. If oil is found only on the back side of the wheel, it indicates a possible turbocharger oil seal leak.The leak may be the result of extended engine operation at low idle or an intake air line restriction (plugged air filters), which causes the turbocharger to "slobber".4. Use a dial indicator to check end clearance on the shaft. Attach the dial indicator point on the end of turbocharger shaft. Push and pull the other end of the shaft. Note the total dial indicator reading. If the measured end play is greater than the Service Manual specifications, repair or replace the turbocharger. Measured end play less than the minimum Service Manual specifications could indicate carbon build up on the turbine wheel. The turbocharger should be disassembled for cleaning and inspection if the measured end play is less than the minimum Service Manual specifications.5. Inspect the turbine housing bore for corrosion.6. Clean the turbocharger housing with standard shop solvents and a soft bristle brush.7. Fasten the air inlet piping and the exhaust outlet piping to the turbocharger housing. Refer to the Torque Specification section in this manual for correct fastener torques.Engine Mounts
Inspect
Typical crankshaft vibration damper (1) and engine mounts (2).Caterpillar recommends checking the engine mounts for deterioration and proper bolt torque. This will prevent excessive engine vibration caused from improper mounting. See your Service Manual or Caterpillar dealer for recommended torque values.Crankshaft Vibration Damper
Inspect
Damage to, or failure of, the crankshaft vibration damper will increase torsional vibrations and result in damage to the crankshaft and other engine components. A deteriorating damper will cause excessive gear train noise at variable points in the speed range.The damper is mounted to the crankshaft, located behind the belt guard on the front of the engine.Removal and Installation
Refer to the Service