MAINTENANCE Item 27 – Vibration Damper The viscous vibration damper should be inspected periodically and replaced if dented or leaking. See Figure 20. Figure 20 Viscous Vibration Damper Heat from normal engine operation may, over a period of time, cause the fluid within the damper to break down 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. 74 All information subject to change without notice. DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION