MAINTENANCE Item 11 – Vibration Damper Item 12 FEPTO Torsional Damper Checking The viscous vibration damper should be inspected periodically and replaced if dented or leaking. See Figure 30. Required Maintenance Operations The following sections describe the required maintenance operations . Engine Inspecting Inspect the engine as follows: 1. Visually check the engine for signs of leakage. A slight dampness at the sealing points is no cause for alarm. NOTE: More severe leaks, combined with a continual loss of oil, must be corrected without delay. 1. Vibration Damper 2. Visually inspect all lines and hoses. Listen for any sound of leaking.
Make sure all pipes and hoses are undamaged, correctly positioned to avoid chafing, and properly secured. Figure 30 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. Coolant Concentration Checking Check coolant concentration as follows: 82 All information subject to change without notice. (Rev. 04/08) DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION