Table 38: Hand Pump Vacuum Leak Test Parts
Part Number Description
66012067001 Hand Pump Vacuum Leak Tester Connector
32007073001 Vacuum Leak Tester Connector O-ring
5.11.2.1
Performing Hand Pump Vacuum Leak Test
The hand pump leak test uses a manual tester that creates a vacuum condition inside the radio and monitors
the radio for a stable vacuum reading. This reading shows if the radio is properly sealed.
Prerequisites:
● Remove the battery.
● Replace the main O-ring with a new one.
NOTE: To create a vacuum condition inside the radio, pull then handle upwards. Pressure inside the
radio will increase gradually with repeated pulling actions.
Procedure:
1. Attach the vacuum hose to the hand pump leak tester. Check the leak tester and hose for leaks by
blocking off the open end of the hose and operating the leak tester a few times.
NOTE: Ensure that when the pulling action is stopped, there is no pressure drop observed; the
actual reading of the gauge pointer at this point is not important. Proceed with a leak test only if
no pressure drop is observed.
Figure 51: Hand Pump Leak Test Setup
Hand Pump
leak tester
Direction of air flow
Radio
2. Unscrew the antenna on the radio for a leak test.
3. Ensure that a vacuum leak tester connector O-ring is attached to the hand pump leak tester
connector. Insert the connector into the antenna port and tighten the connection.
4. Attach the open end of the pump hose to the connector.
5. Place the radio on a flat surface with the back chassis facing upward. Place a few drops of water on
the vent membrane that protects the seal port on the back chassis.
IMPORTANT: To prevent air leaking through the seal, ensure that water covers the entire vent
membrane.
6. Start the vacuum leak test by pulling the hand pump to achieve vacuum pressure of 6.5 inHg. Observe
the gauge for 60 seconds.
NOTE: The maximum allowable pressure drop after 60 seconds is 0.5 inHg. If the gauge
indicator drops more than one scale increment on the indicator, then the radio leak test fails.
68015000841-EL
Chapter 5: Maintenance
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