RETAINER 1U2070 - Caterpillar

Illustration 1 g02547116The crankshaft vibration damper limits the torsional vibration of the crankshaft. The visconic damper has a weight that is located inside a fluid filled case.Damage to the crankshaft vibration damper or failure of the damper can increase torsional vibrations. Torsional vibration 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.A damper that is hot may be the result of excessive friction. This friction could be due to misalignment. Use an infrared thermometer to monitor the temperature of the damper during operation. If the temperature reaches 93 °C (200 °F), consult your Cat dealer.The damper utilizes engine oil for cooling.Inspect the damper for evidence of dents, cracks, and oil leakage.Inspect the seals if there is evidence of oil leakage.Replace the damper for any of the following reasons.
The damper is dented, cracked, or other damage.
The paint on the damper is discolored from heat.
The engine has had a failure because of a broken crankshaft.
The crankshaft bearings are showing excessive wear.
There is a large amount of gear train wear that is not caused by a lack of oil.Removal and Installation
Refer to the Service Manual or consult your Cat dealer for information about damper replacement.