CROWN AS 1979374 - Caterpillar

You must read and understand the warnings and instructions contained in the Safety section of this manual before performing any operation or maintenance procedures.All PM Level 2 maintenance is to be performed at the interval specified in the Maintenance Schedule.Before proceeding with PM Level 2 maintenance, perform all Two Year, PM Level 1 and Daily maintenance requirements.Engine
Steam Clean
Accumulated grease and oil on an engine is a fire hazard. Keep your engine clean. Remove debris and fluid spills each time a significant quantity accumulates on the engine.
Steam cleaning your engine is a recommended preventive maintenance practice because it provides for easy detection of fluid leaks. Repairing an oil or coolant leak upon detection may save money by avoiding major repairs that could result from low oil or coolant levels.Steam cleaning the engine as recommended will also improve the engine's heat transfer characteristics.Turbocharger
Turbocharger bearing failures can cause large quantities of oil to enter the air intake and exhaust systems. Loss of engine lubricant can result in serious engine damage.Minor leakage of a turbocharger housing under extended low idle operation will not cause problems as long as no turbocharger bearing failure occurred.When a turbocharger bearing failure is accompanied by a significant engine performance loss (exhaust smoke or engine speed up at no load), DO NOT continue engine operation until the turbocharger is repaired or replaced.
Inspect/Check
1. Remove the exhaust outlet piping and inlet piping from the turbocharger. Visually check for oil leaks.2. Turn the turbine and compressor wheel by hand.3. The assembly should turn freely.4. Inspect the turbine wheel and compressor wheel for contact with the turbocharger housing.5. There should NOT be any visible signs of contact between the turbine or compressor wheel and the turbocharger housing.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 turbo oil seal leak. The leak may be the result of extended engine operation at low idle or an intake air line restriction (plugged filters).Maintain the compressor wheel/turbo housing by cleaning with standard shop solvents and a soft bristle brush.6. Check the end play and bearing clearance on the turbine wheel and shaft.If the measurements are not within specifications, the turbocharger must be repaired or replaced.7. When installing or replacing V-band clamps, position the gap (tightening screw) down if possible so any accumulation of moisture will drain away.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.Crankshaft Vibration Damper
Inspect/Check
Damage to, or failure of, the damper will increase torsional vibrations and result in damage to the crankshaft and other engine components. A deteriorating vibration damper will cause excessive gear train noise at variable points in the speed range.Visconic Damper (If Equipped)
The vibration damper weight is located inside a fluid filled case. The weight moves