Sony MPK-TRV3 Operating Instructions Manual page 19

Do not twist the O-ring
Put the O-ring in the groove evenly. Never twist it.
Do not pinch the O-ring with the marine pack
When jointing the front and rear shells, take care not to pinch the O-ring between them.
If this happens, not only will the O-ring be damaged, but water may leak in.
Storage
Put the supplied spare O-rings in the original carton and store it in a cool place.
• Do not expose the O-ring to direct sunlight.
• Do not place a heavy object on the O-ring.
• Do not fold the O-ring.
Useful life of the O-ring
Depending upon the maintenance and the length of use, we recommend changing the
O-ring every one or two years.
The O-ring (3-952-928-01) can be replaced at your nearest Sony Service Center.
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