GEAR (22 teeth) 7G2520 - Caterpillar

Viscous Vibration Damper
Illustration 1 g01034223
Typical example
(1) Adapter
(2) Damper assembly
(3) Pulley
(4) BoltsThe vibration damper is installed on the front of crankshaft. Damage to the vibration damper or failure of the vibration damper will increase vibrations. This action will result in damage to the crankshaft.Replace the damper if any of the following conditions exist:
The damper is dented, cracked, or fluid is leaking from the damper.
The paint on the damper is discolored from excessive heat.
The damper is bent.
The bolt holes are worn or there is a loose fit for the bolts.
The engine has had a crankshaft failure due to torsional forces.
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.
Note: Under certain extreme load and high ambient temperature conditions the engine vibration damper effectiveness could degrade over time. The engine ECM will monitor these conditions. Also, if appropriate will activate this fault code and will display a message on the EMCP to Replace Engine Damper. If this action occurs, reset the fault counter and replace the engine damper. Failure to replace the damper could result in significant engine damage.