Olympus PT-047 Mode D'emploi page 58

Install the O-ring
Confirm that no foreign matter is adhered, apply a thin coat of the grease
provided to the O-ring, and fit the O-ring into the groove. At this point,
confirm that the O-ring does not stick out from the groove.
En
• When sealing this product, make sure that no hairs, fibers, sand
particles or other foreign matter stick not only to the O-ring, but also to
the contact surface (front cover). Even a single hair or a single grain of
sand may cause water leakage. Please check with special care.
Hair
Replace consumable parts
• The O-ring is a consumable part. Regardless of the number of times the
Case is used, it is recommended that the O-ring be replaced with a new
one at least once a year.
• Deterioration of the O-ring is accelerated by the use conditions and the
storage conditions. Replace the O-ring even before a year has passed
if it shows signs of damage, crack or loss of elasticity.
Note:
• Please use genuine Olympus silicone grease, silica gel and O-ring.
• Do not try to replace the O-ring by yourself.
• We recommend to perform the check periodically.
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Examples of foreign matter sticking to the O-ring
Fibers Grains of sand