July 16, 2004 6881094C28-D
8-20 Disassembly/Reassembly Procedures: Ensuring Radio Submergibility
10. Remove the adapter and pressure hose added in steps 1 and 2, above.
11. Install the vacuum test port plug by pressing it in, ensuring that the plug sits flat all around the
edges and it is flush with the casting.
12. Inspect the vent port seal (61) to ensure that the seal behind the label’s (62) two slots has not
been punctured. If it has been punctured, the seal and the label must be replaced.
8.10.9 Troubleshooting Leak Areas
Before repairing any leak, first read all of the steps within the applicable section. This will help to
eliminate unnecessary disassembly and reassembly of a radio with multiple leaks. Troubleshoot only
the faulty seal areas listed in Section “8.10.8 Pressure Test” on page 8-19, and, when multiple leaks
exist, in the order listed.
NOTE: Before reassembling the radio, always install a new main seal O-ring, and new seals in the
defective area.
8.10.9.1 Housing
Do one or both of the following:
1. If a leak occurs at the lens, universal connector, casting/housing interface, or PTT/Ratt button
area of the housing, replace the housing. Refer to Section “8.8.1 Separate the Casting and
Housing Assemblies” on page 8-12.
a. Remove the housing assembly (2) from the radio.
b. Discard the housing assembly (2) and main seal O-ring (55).
c. Install a new main seal O-ring (55) around the casting assembly (51).
d. Install a new housing assembly (2) to the radio.
e. Inspect the main seal (55) for proper seating.
f. Observe carefully to ensure that the main seal O-ring (55) is not pinched between the
housing (2) and the casting (51).
2. If the leak occurs at the control top area, remove the knobs, knob inserts and antenna in
order to determine the leak location:
a. Conduct the Pressure Test.
b. Identify the leak location.
8.10.9.2 Antenna Bushing Seal
To replace the antenna bushing seal:
1. Referring to Section “8.8.1 Separate the Casting and Housing Assemblies” on page 8-12,
remove the housing assembly (2) from the radio.
2. Remove and discard the antenna bushing gasket (54).
3. Inspect the housing seal surface for debris or damage. Remove any debris and replace hous-
ing if damaged.
To avoid equipment damage, keep the area around the port
seal dry by ensuring that there is no water around the
casting’s vacuum port.
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a u t i o
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