Exam Question
Discuss the consequences of failure to maintain correct clearances in the case of auxiliary diesel engine crankshaft and bottom end bearings. Describe the procedure of taking crankshaft deflection. (16)
Class 4 (4th Engineer)
MEKM
📅 Jan 2025
Reference Answer
### **Part 1: Consequences of Incorrect Bearing Clearances**
Maintaining correct clearances in crankshaft main bearings and connecting rod bottom end bearings is critical for the reliable operation of an auxiliary diesel engine. These clearances facilitate the formation of a hydrodynamic oil film and provide a path for cooling oil flow. Failure to maintain these clearances within manufacturer's specifications leads to severe consequences.
#### **A. Consequences of Excessive Clearance**
Excessive clearance, typically caused by bearing wear over time, results in the following detrimental effects:
Maintaining correct clearances in crankshaft main bearings and connecting rod bottom end bearings is critical for the reliable operation of an auxiliary diesel engine. These clearances facilitate the formation of a hydrodynamic oil film and provide a path for cooling oil flow. Failure to maintain these clearances within manufacturer's specifications leads to severe consequences.
#### **A. Consequences of Excessive Clearance**
Excessive clearance, typically caused by bearing wear over time, results in the following detrimental effects:
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