Class 2 (2nd Engineer) MEKG 📅 Jun 2023

Exam Question

Sketch a sealing arrangement for an oil lubricated stern tube and (16)

(a) Identify the common form of seal failure

(b) State how oil loss due to seal failure can be restricted whist on passage

Reference Answer

A comprehensive answer addressing the sealing arrangement for an oil-lubricated stern tube, its failures, emergency actions, and materials.
### Stern Tube Sealing Arrangement
The primary function of a stern tube sealing arrangement is twofold: to prevent the leakage of lubricating oil from the stern tube into the sea and to prevent the ingress of seawater into the stern tube lubrication system. A typical modern arrangement consists of a forward seal assembly (in the engine room) and an aft seal assembly (outboard).
**Aft Seal Assembly (Outboard):**

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