- Open JCW inlet and outlet, purge the unit , check for leak.
- Check pump pressure
- Expansion tank needs to.top up
- Confirm nothing left inside crankcase
- Open spring air , control air , check for leak
- Start LO pump , check LO flow and check for any leak
- Inspect crankcase for any rags or tool
- Confirm bolts are secured with locking wire.
- Turn engine few revolutions and check amperage
- Open fuel inlet valve , check for recirculation and leak
- Check for cylinder lubrication ( press prelube on HMI in case of Alpha lubrication or manual cranking )
- Open indicator cock , check starting air valve for any leak.
- Increase cylinder lubrication for that unit.
- Carry out long blowthrough.
- Try out main engine on ahead and astern direction
- Check exhaust valve operation
- Check exhaust gas temp and leakage.
- Check piston cooling oil temp
- Check scav temp:
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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