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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► Shaft withdrawn and examined: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