Disassembly/Reassembly Procedures: Ensuring Radio Submergibility Sec 1: 8-41
8.10.7.1 Vacuum Tool Setup
1. Attach one end of the hose to the Vacuum Pump. Attach the other side of the hose to the
Vacuum Adapter.
2. Tool Leak Test
:
i. Block the open end of the Vacuum Adapter.
ii. Pull the knob on the Vacuum Pump to create vacuum.
iii. Pump at least 15 inHg.
iv. Watch the gauge for a minute. If there is any loss of vacuum, repair or replace the tool.
3. Ensure that the seal is attached to the Vacuum Adapter.
8.10.7.2 Test Procedure
Figure 8-55. Attaching Vacuum Adapter
1. Attach the Vacuum Adapter onto the radio in the same manner as a radio battery. Ensure
both latches are clicked into place.
2. Pull the knob on the Vacuum Pump to create vacuum. The vacuum test pressure should be
between 5-7 inHg.
3. Observe the gauge for approximately 2 minutes.
• If the needle falls less than 2 inHg, the radio passes the vacuum test.
i. If the seal passes this inspection, this radio is approved for submergibility. No additional
testing is required.
• If the needle falls more than 2 inHg, the radio fails the vacuum test and the radio might
leak if submerged. Additional troubleshooting of the radio is required.
i. Keep the Vacuum Adapter on but remove the Vacuum Pump from the Vacuum Adapter.
ii. Continue with Pressure Test as described in Section 8.10.8.
Ensure that the vacuum pressure NEVER exceeds 7 inHg.
The radio has pressure sensitive components that can be
damaged if the pressure exceeds this limit.
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