Disassembly/Reassembly Procedures: Ensuring Radio Submergibility Sec 2: 8-41
8.10.4 Specialized Test Equipment
This section summarizes the specialized test equipment necessary for testing the integrity of ASTRO
APX 6000XE radios.
To ensure that the radio is truly a watertight unit, special testing, test procedures, and specialized
test equipment are required. The special testing involves a vacuum check of the radio and pressure
testing (troubleshooting) for water leaks if the vacuum check fails. The specialized test equipment is
needed to perform the vacuum check and pressure testing, if required.
8.10.4.1 Vacuum Pump Kit NLN9839_
The Vacuum Pump Kit includes a Vacuum Pump with gauge and a Vacuum Hose. The Vacuum
Adapter (p/n 66009259001) which connects the vacuum pump to the radio, must be ordered
separately.
8.10.4.2 Pressure Pump Kit NTN4265_
The Pressure Pump Kit includes a Pressure Pump with gauge and a Pressure Hose. As with the
Vacuum Pump Kit above, the Vacuum Adapter connects the pressure pump to the radio.
8.10.5 Disassembly
Disassemble the radio according to section 8.7 on page 2:8-13.
8.10.6 Reassembly
To reassemble the radio:
1. Inspect the seal on the Back Chassis Assembly (B, N) for any damage or foreign material.
2. Inspect the seal on the Speaker Module (J) for any damage or foreign material.
3. Inspect the Battery Connector Seal (13) on the RF Board Assembly (C) for any damage.
4. Inspect the mating seal surfaces on the Main Chassis (15) for all of the above seals for
damage or foreign material that might prevent the seals from sealing properly.
Continue reassembling the radio according to section 8.9 on page 2:8-32. Tighten all hardware that
was loosened or removed.
8.10.7 Vacuum Test
The Vacuum Test uses a Vacuum Pump to create a negative pressure condition inside the radio. The
gauge measures this pressure and is used to monitor any pressure changes in the radio. A properly
sealed, watertight radio should have minimal change in pressure during the test.
Before starting the vacuum test:
• Remove the battery and antenna.
• Remove the Universal Connector Cover (46) or any other accessories to expose the universal
connector.
NOTE: Refer to the exploded view diagrams and parts lists found in “Chapter 10: Exploded Views
and Parts Lists” on page 2:10-1.
Do not reassemble the radio without first performing the
following preliminary inspection procedure.
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