UNIVERSAL JOINT GP 1302374 - Caterpillar

Accidental machine starting can cause injury or death to personnel working on the machine.To avoid accidental machine starting, turn the battery disconnect switch to the OFF position and remove the key.Place a do not operate tag at the battery disconnect switch location to inform personnel that the machine is being worked on.
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The Crankshaft Vibration Damper is located behind the access door on the right side of the machine.
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The Crankshaft Vibration Damper
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Damage to the crankshaft vibration damper or failure of the crankshaft vibration damper can increase torsional vibrations. This can result in damage to the crankshaft and to other engine components. A deteriorating damper can cause excessive gear train noise at variable points in the speed range.The damper is mounted to the crankshaft on the front of the engine.Visually inspect the crankshaft vibration damper for damage.Check the bolts for proper tightness. Refer to the Operation and Maintenance Manual, "Torque Specifications".Close the access door on the right side of the machine.Refer to the Service Manual or consult your Caterpillar dealer for information about damper replacement.