C-10 Petroleum Engine Caterpillar

Illustration 1	g01121454
Vibration damper and pulley Typical example (1) Damper assembly (2) Pulley (3) Crankshaft (4) Bolt (5) Bolt

The vibration damper is installed on the front of crankshaft (3). Vibration damper (1) has a weight in a case. The space between the weight and the case is filled with viscous fluid. The weight moves in the case in order to limit the torsional vibration.

Replace the damper if any of the following conditions exist:

• The damper is dented, cracked, or leaking.

• The paint on the damper is discolored from heat.

• There is a large amount of gear train wear that is not caused by lack of oil.

• Analysis of the oil has revealed that the front main bearing is badly worn.

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