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Heat from normal engine operation

may, over a period of time, cause the

ﬂuid within the damper to break d own

and lose its dampening properties.

For this reason the viscous vibration

damper must be replaced at time

of normal major engine overhaul,

regardless of apparent condition.

Figure 21 Viscous Vibration

Damper

Engine Ap plication

Initial Valve Lash and Injector Height

Measurement/Adjustment Period

Vehicle E ngines

60,000 Miles (96,000 km) or

24 Months*

Stationary, Construction/Industrial,

Agricultural, or Gene rator Set Engines

1,500 Hour s or 45,000 Miles

(72,000 km)*

* Whichever comes ﬁrst.

Table 19 Valve Lash and Injector Height Adjustment

82 All information subject to change without notice. (Rev. 01/04)