DRAFT
TB 9-2320-364-13&P-1
AC SYSTEM REFRIGERANT (R-134a) MAINTENANCE - Continued
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PLSAC238
16. Turn panel low side valve (18) to 9 o'clock position.
17. Monitor the charge weight and turn panel low side valve (18) to 12 o'clock position after 3 lbs. (1.4 kg) of
refrigerant has entered AC system.
18. Turn AC system OFF (WP 0004).
19. Shut engine OFF (TM 9-2320-364-10).
NOTE
Any rise in vacuum indicates a leak in the AC system.
20. Monitor low side pressure gage (19) and high side pressure gage (20) for five minutes.
NOTE
If there is a change in pressure after five minutes, perform Steps 21 through 23. Change of
pressure indicates a leak in the system.
If there is no change in pressure after five minutes, proceed to Step 24, charging is
complete.
21. Perform a leak test inspection (WP 0052).
22. If a leak is found, recover refrigerant and repair leak as required.
23. Repeat charging procedure.
0053-18