BOLT 1653929 - 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.Engine Protective Devices
Inspect/Check
The alarm and shutoff controls should be checked for proper operation in order to ensure engine protection. The manual shutoff devices should be tested for proper operation.All checks and tests should be made by Caterpillar authorized service personnel or other qualified mechanics. Consult with your Caterpillar dealer for assistance.Visual Inspection
Visually check the condition of all sensors and wiring. Look for loose, broken, or damaged wiring and components. Repair or replace any damaged wiring or components immediately.Engine Mounts
Inspect
Crankshaft vibration damper (1) and engine mounts (2).Inspect the engine mounts for deterioration and proper bolt torque. Engine vibration may be caused by improper engine mounting and/or engine mount deterioration. Any engine mount showing deterioration should be replaced. Refer to the Torque Specifications section of this publication for recommended bolt torque values. See the Marine Engine Application and Installation Guide for more information.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 Manual for the damper removal procedure and for the damper installation procedure.Rubber Damper
If your engine is equipped with a rubber damper, inspect the damper for:* rubber deterioration, cracking* movement of the rubber from the original locationThe rubber damper should be replaced if any of these conditions are found.Visconic Damper
The visconic damper has a weight, located inside a fluid filled case. The weight moves in the case to limit torsional vibration. Inspect the damper for evidence of dents, cracks or leaks of the fluid.Replace the visconic damper if the damper is dented, cracked, or leaking. Refer to the Service Manual or contact your Caterpillar dealer for damper replacement.Turbocharger
Periodic inspection and cleaning is recommended for the turbocharger compressor housing (inlet side) and the aftercooler core. Since the crankcase fumes are ingested through the inlet air system, oil and combustion by-products may collect in these two areas.This buildup, over time, can contribute to loss of engine power, increased black smoke, and overall loss of engine efficiency. This buildup is only a possible contributor to these conditions.Operating the engine until the turbocharger fails can severely damage the turbocharger's compressor wheel and/or the engine. Damage to the turbocharger compressor wheel could allow parts from the compressor wheel to enter the engine cylinder, causing additional damage to the piston, valve, and cylinder head.
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 a turbocharger bearing failure has NOT occurred.When a turbocharger bearing