- Lock steering gear in mid position
- Remove the earth wire
- Measure clearances ( rudder drop and jumping clearances )
- Fix eye bolt to rudder stock and take load with the help of chain block at strong point provided
- Remove the bolts of gand housing and remove gland packing.
- Remove the locking ring
- Remove grease plug
- Remove the moving cone which is in 2 pieces( boted with each other). Put eye bolt diametrically opposite.
- Remove the bottom half which is also in 2 pieces and attached to ahip structure via chocks
- **Note - The bearing is conical shaped to locate the rudder stock . The bearing top and bottom half is on 2 halves
- Material - Cast iron (CI has self lubricating property and greater shock absorber)
1. High cost: Manganese bronze is a costly alloy, making it less economical for large propellers. 2. Low strength-to-weight ratio: Compared to other propeller materials like nickel-aluminum bronze or stainless steel, manganese bronze has a lower strength-to-weight ratio. 3. Susceptible to corrosion: Manganese bronze can corrode in seawater, especially when exposed to high velocities and turbulence. 4. Poor cavitation resistance: Manganese bronze is more prone to cavitation damage than other materials. 5. Difficult to cast and machine: Manganese bronze is challenging to cast and machine, making it less desirable for complex propeller geometries. 6. Limited weldability: Manganese bronze has poor weldability, making repairs and modifications difficult. Nickel-aluminum bronze or stainless steel are commonly used for propellers due to their: - High strength and durability - Excellent corrosion resistance - Good cavitation resistance - Ease of casting and machining - Weldability
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