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7.1.2. Periodical maintenance (Packing replacement) flow
• The integrity of the waterproof packings may decrease about 1 year, with use and age.
(We recommend end-users to replace the waterproof packing at least once each year described in the operating instructions.)
• Please use waterproof packing kit (Part No.: VUMG1863). (7 types, 8 packings in total are included)
• Do not touch the waterproof packings directly by the hand.
• Do not perform cleaning of waterproof packings by the solvent of alcohol etc. or by blowing air.
• Take care not to put any foreign objects (garbage and dust).
• As for the air-leak test, refer to "7.2. Air-leak Test".
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