5-36 Disassembly/Reassembly Procedures: Ensuring Radio Immersibility
5.8.9.4 Breathing Vent Membrane and Breathing Vent Label
To replace the Breathing Vent Membrane and Breathing Vent Label:
1. Remove the Breathing Vent Label that covers the Breathing Vent Membrane from the
chassis.
2. Remove the Breathing Vent Membrane.
3. Ensure that the chassis’s surface (at the Breathing Vent Label & Breathing Vent Membrane
recessed) is clean, no/minimum scratches and free from any adhesive or other foreign
materials.
4. Install a new Breathing Vent Membrane, covering the vent port hole, in the small recessed
area in the chassis. Ensure that no oily substance come in contact with the seal.
5. Install a new Breathing Vent Label over the Breathing Vent Membrane in the larger recessed
area in the chassis. Press down evenly over the label’s surface to ensure good adhesion.
5.8.9.5 Battery Maintenance
1. As part of an Annual Battery Maintenece Program or as required (when the battery contacts
are dirty or show signs of wear) it is recommended that the Battery‘s Radio-side and Charger-
side contacts are cleaned with DeoxIT®GOLD cleaner/lubricant.
2. DeoxIT®GOLD (Supplier CAIG Labs, P/N G100P) cleaner/lubricant pen has been found to be
very effective at cleaning and extending the life of the battery‘s contacts. DeoxIT®GOLD
cleaner/lubricant is available at numerous electronics suppliers (Radio Shack, McMaster Carr,
Fry’s, etc.) and directly from manufacturer, CAIG Labs, at http://www.caig.com.
3. This pen based package is recommended as it provides better access to the recessed con-
tacts of the battery. The pen’s tip may need to be modified (trimmed on the sides) to improve
penetration into the battery contact slots. Per the manufacturer’s instructions, shake the pen
until the fluid begins to flow and wipe the battery's contact surface with the felt tip. After
cleaning, inspect the contact surfaces for signs of advanced wear.
4. Advanced contact wear is defined as wear through either the contact platings (gold and
nickel) to the base metal (copper). Copper exposure is characterized by a distinctive orange-
brown metal appearance surrounded by the silvery nickel underplate and gold top coat.
5. In some cases, a magnified (10x minimum) inspection may be required to verify wear through
to the base material. Polishing of the gold or nickel surface is common and is not considered
a need for replacement. In instances where advanced wear is evident, the battery should be
replaced.
6. After cleaning the contact areas of any foreign material, let the lubricant/cleaner dry for 2 min-
utes. Replace the battery on the radio and test for intermittency by moving the battery relative
to the radio as might occur in regular use.
NOTE
Regular maintenance (at least annually) of this area is recommended to ensure
contamination free interface and to prolong the life of the battery contacts.
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