Class 4 (4th Engineer) MEP 📅 Jul 2023

Exam Question

Describe procedures for following maintenance works of Rudder in dry dock.

(a) What are pintle clearances and how they are measured? (5)

(b) What is the procedure for inspection of Rudder? (5)

Reference Answer

### (a) Pintle Clearances and Measurement
**1. Definition of Pintle Clearance**
Pintle clearance is the radial gap between the rudder pintle pin and its corresponding bearing bush located in the gudgeon. The rudder pintle is the pin on which the rudder pivots, and the gudgeon is the bracket housing the bearing, attached to the stern frame or rudder horn. This clearance is critical for ensuring smooth rudder operation while preventing excessive movement which can lead to high stress, vibration, and eventual failure of the rudder components or steering gear.
**2. Measurement Procedure in Dry Dock**

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