Lifeboat Launching appliances(Lifeboat Davit) should be inspected and maintained weekly and monthly in accordance with the following tables. The tables list the items to checked, the method of inspection, the procedure to be followed, and the frequency at which the items are to be attended to.
Single arm slewing davit
Table 6.3.1.1 covers the davit. Table 6.3.1.2 covers the winch. Table 6.3.1.3 covers the electric parts.
On-board maintenance procedure
As a result of inspection, any defective parts should be repaired in accordance with following procedures. Any shortage of quantity should be supplemented to correct number. Defective parts other than the followings should be recorded along with their details and ordered for maintenance and repair by the manufacturers.
Wire rope
Wire ropes should be changed in the following cases:
.1 break of elemental wire was observed;
.2 7% reduction of nominal diameter was observed;
.3 kink or looseness of ply was observed; or
.4 erosion/corrosion was observed.
Check fixing condition of wire ropes.
Change the boat falls within an appropriate period.
Adjust the length of boat falls as necessary so that the clearances between the davit arm and davit arm stopper at fore and aft are almost the same.
Ensure that material and diameter of suspension links are as specified by the release gear manufacturer.
Boat winch
Prior to commencement of the maintenance work for the winch, the boat should be secured to prevent movement.
Oil should be checked and changed if discoloured. In case that oil level is low, oil should be added until the its surface comes to the designated level in the oil gauge.
Surfaces of each gear inside the gear box should be checked. In case that a defect is found on a surface of gear, the gear box should be replaced or repaired.
Greasing
Lubrication is essential for the function of the davit and winch and regular checking is necessary. Greasing also should be regularly conducted. For appropriate greasing, the detailed structure of the davit and winch and the functions of their parts should be understood.
All grease nipples of the davit should be greased at least once a month.
Gear oil inside the boat winch should regularly be checked regarding amount, change of colour and mixture of moisture.
Wire rope oil/grease should be regularly checked to prevent loss of oil/grease. Wire rope should be oiled or greased every two months in general.
