Propeller Shaft survey

2Propeller shaft survey

► Periodicity is defined in Rules Pt A, Ch 2, Sec 2, 5.5 and Figure 2

► 10 years periodicity granted provided that:

The design is in accordance with the rules

Modified survey conducted after 5 years + 6 months

Stern tube lub oil analysis is conducted every 6 months

► MON-SHAFT granted provided :

Design is in accordance with the rules

Temperature monitoring system fitted to stern tube bearing

Partial survey conducted every 5 years + 6 months

Stern tube L.O. Analysis is conducted every 6 months

Propeller Shaft survey

3Propeller shaft survey

► Review log book & records for:

Stern tube L.O. analysis

L.O. consumption

Stern tube bearing temperature (if applicable)

► Verify with the Chief Engineer if any abnormal vibration

► Shaft withdrawn and examined:

Exposed parts

Cone and, if applicable, key & key-way

Bearing journal surfaces

Shaft in way of seals

Thread, nut & locking arrangement, coupling & bolts

Propeller Shaft survey

4Propeller shaft survey

► Forward part of taper and key-way crack tested

► Stern tube bush inspected for:

Condition of white metal

Loss of bonding

Excessive clearance

► Clearances recorded by:

Measuring, jacking, feeler, poker gauge

Propeller Shaft survey

5Propeller shaft survey

► Shaft seal to inspect for :

Wear & tear

Damage to sealing faces

Damaged ‘O’ seals

Liner wear

► Propeller inspected for :

Blades for damage and cracking

Taper bore for damage and fit

► On assembly check :

Jacking pressure

Movement

Check seal for leakage

Propeller Shaft survey

6Propeller shaft survey

► Shaft inspected as before except that :

Coupling flange to be inspected

Studs, nuts & locking arrangements

► Propeller blades to inspect :

Studs, nuts & locking arrangements

Seals

Blade operating connections to inspect, clearances to check

► Operating system to examine & test

► Piping to inspect & test

► Hydraulic pumps to examine & test

► L. O. tank low level alarm to test

C. P. Propeller

7Propeller shaft survey

C. P. Propeller

8Propeller shaft survey

C. P. Propeller

9Propeller shaft survey

C. P. Propeller

10Propeller shaft survey

C. P. Propeller

11Propeller shaft survey

► Check liner for damage & wear

► Check shrink fit on shaft

► Inspect liner / propeller seal

► Check inboard gland

► Inspect Lignum Vitae bush

► Measure clearances

► Check sheathing (if fitted)

Propeller shaft – Liner(s)

12Propeller shaft survey

► Check log book & records for :

L.O. analysis & consumption

Bearing temperature monitoring (if applicable)

► Draw propeller off taper

Inspect taper and bore of propeller

NDT of forward 30% of taper

Examine gland & seals

Modified Survey

13Propeller shaft survey

► Record clearances

► Inspect propeller for damage / cracks

► Check jacking pressure for refitting

► Check nut locking arrangements

► Test seal for leakage

Modified Survey

14Propeller shaft survey

► Review log book & records for L.O. analysis & consumption

► Inspect & remove propeller

► Inspect shaft / NDT taper

► Inspect threads, nut & locking arrangements

► Inspect seals

► Inspect hull liner for corrosion / erosion

Thruster