Class 2 (2nd Engineer) MEKM 📅 Oct 2019

Exam Question

Discuss the consequences of failure to maintain correct clearances in the case of main diesel engine crankshaft and bottom end bearings: Sketch a bottom end bearing paying particular attention to the arrangement of ensuring uninterrupted flow of oil to the top end bearing.

Reference Answer

Insufficient bearing clearance:
Indications:
Increase in bearing temperature due to reduced oil flow and friction.
Dark brown appearance of lubricating oil caused by overheating and oxidation.

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