D11R Track-Type Tractor C32 Engine Retrofit Supplement Caterpillar

Damage to the vibration damper or failure of the vibration damper will increase torsional vibrations. These vibrations will result in damage to the crankshaft and in damage to the other engine components. A deteriorating vibration damper will cause excessive gear train noise at variable points in the speed range.

See the Disassembly and Assembly, RENR8223, "D11T Track-Type Tractor Engine Supplement" for the procedure to install a new damper.

Caterpillar recommends replacing the damper for any of the following reasons:

• The engine has had a failure because of a broken crankshaft.

The damper can be used again if none of the above conditions are found. The damper can be used if the damper is not damaged.

In the damper, a wobble can occur on the outer ring. Some of the wobble of the outer ring is normal. If a wobble is present, replacement of the damper is not necessary. You can confirm an acceptable wobble by seeing the Testing and Adjusting, SENR9937, "C27 and C32 Engines for Caterpillar Built Machines" for the procedure to check the damper.

Illustration 1	g01305989

The double viscous vibration damper limits torsional vibration effectively. This C32 Acert engine uses a viscous vibration damper unlike the rubber vibration damper with alignment marks.

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NOTICE
Inspect the viscous vibration damper for signs of leaking and for signs of damage to the case. Either of these conditions can cause the weight to contact the case. This contact can affect damper operation.

Also, in order to check a viscous vibration damper for another C32 Acert engine, see Service Manual, RENR9798, "Vibration Damper - Check" for typical instruction.

Caterpillar recommends checking the engine mounts for deterioration. This action will prevent excessive engine vibration that is caused from improper mounting.