Datem Neptune 5000 - Maintenance

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Neptune 5000

prevent the potential for any fastenings friction welding together, all nuts and

bolts should be assembled using an anti-seize compound. Attention should be

taken to ensure that the correct washers and Nylock nuts are used in the

appropriate locations, to prevent frame failure during operation.

Umbilical Termination

In some situations it may be necessary to remake the umbilical termination,

due to cable shortening or replacement through damage. Whilst not supplied

by Datem, if the termination mounted on the umbilical is an open spelter

socket it can normally be re-used. To reuse the termination, cut the cable

close to the end of the socket, and drill out the centre. The remaining cast

Wirelock® can be removed with a small chisel and a hammer.

When remaking the termination, it is important to ensure that the steel wire

armour on the cable is not allowed to start unwinding when it is cut. With the

open socket slid over the cable, follow the instructions enclosed with the

Wirelock® kit for fitting. A sample instruction sheet for the Wirelock® kit can

be found in appendix A, but caution should be taken to ensure that the

Wirelock® supplied is the same product. Care should be taken to ensure that

the coaxial cable core of the umbilical exits the open socket in the centre, and

is not coated in any of the Wirelock® compound. Please refer to appendix B

for hazard information related to this operation.

NOTE: It is recommended in addition to brooming the wire, to bend the end

15mm of every strand round on itself to form a hook shape.

Maintenance

Appropriate safe working practices should be followed to ensure

that all hazards are minimised.

When the system is in operation, it should be washed down with clean, salt-

free water whenever it is returned to the deck of the ship. This will reduce

corrosion, and reveal any damage to the frame members. Particular attention

should be paid to the condition of the open socket fitted to the umbilical, and

all the lifting arrangement that connects it to the frame’s top plate. Any

damage, creepage, or fractures in any of these parts demands immediate

replacement before further use.

The electrical cables connecting the umbilical to the Power Pod should be

visually inspected regularly to ensure there are no chafes or cut in the

insulation. The connectors on all these cables should be tightly fitted with no