TM 9-4120-385-14
b. SOAP SOLUTION LEAK TEST.
NOTE
When using the soap solution test, the refrigerant system must be
pressurized with nitrogen and a proper charge of R22. Refer to
steps 1 through 4 and 18 through 22 above.
1.
Using care to avoid touching blower or electrical components, brush soap or
detergent solution on all joints or possible points of leakage.
2.
Follow a definite sequence to avoid missing any points that should be tested.
Watch for bubbles and mark point where leak is found with grease pencil.
3.
4.
Wipe solution from all joints.
5.
Repair leaks as required. Refer to steps 23 through 29 above. If no leaks are
found, refer to steps 26 through 29 above.
5-4. PRESSURE TEST
a. SETUP. See Figure 5-3.
1.
Remove two screws and access cover.
2.
Remove valve caps from the service valves.
Connect charging manifold hoses to service valves. Make sure the high pressure
3.
hose is connected to the high pressure service valve, and the low pressure hose to the low
pressure (suction) service valve. See Figure 53.
4.
Make sure the middle hose on the charging manifold is plugged or capped.
