All Heavy Duty Components Viscous Vibration dampers are manufactured to OEM specifications. Shown below are two typical construction photos. A third is a "rolled cover" design not shown. This is also an accepted design still used on some models but, in many cases has been replaced by a welded cover or bolted cover design.

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Cross-Sectional Drawing of a Viscous Damper, Bolted Design
(Damper for Stationary and Propulsion Application)

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Cross-Sectional Drawing of a Viscous Damper
Truck-Damper, Laser Welded

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