8/7/2019 Maintenance manual for Folding Type hatch cover

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SPECIAL PRECAUTIONS FOR THE FOLDING TYPE AND PAN TYPE HATCH

COVERS

1. The eccentric wheels and the balancing wheels should be checked for wear and

tear of the bush, pin and attachment with the hatch cover panel. Makers manual

should be consulted for wear and tear allowable parameters and should berenewed if required.

2. The length of towing chain between each panel should be as per makers manual

if the data is unavailable then the sag should be equal to approximately a fistwidth at the mid point as shown.

3. Any damaged packing should be renewed as shown and minimum 1 meter length

should be renewed. A scarf insert will hold the packing in position.

8/7/2019 Maintenance manual for Folding Type hatch cover

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4. The safety locking devices for individual pontoon should be in good working

condition.

5. On vessels with tween deck covers should be regularly checked for deformation,cracks and corrosion because they are in mid air without any bottom support and take the

weight of cargo and forklifts. Prior any forklifts are allowed on tween deck covers it

should be made sure that the load density is not bypassed.