AC DOES NOT COOL OR COOLS INADEQUATELY - Continued

DRAFT

TB 9-2320-279-13-1

AC DOES NOT COOL OR COOLS INADEQUATELY - Continued

WARNING

Moving engine components can cause severe injury. Keep away from fan, belts, and pulleys while

engine is running.

Wear protective goggles and nonleather gloves when servicing air conditioner system. Failure to

comply may result in injury to personnel.

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VISUAL INSPECTION

(1)

Inspect AC condenser dryer moisture sight glass.

(a) If AC condenser dryer sight glass indicates a

low charge:

1. Shut off engine (TM 9-2320-279-10).

2. Perform leak test (WP 0049).

NOTE: Perform Steps 3 through 6 only if leaks are

found.

3. Recover R-134a refrigerant (WP 0050).

4. Repair leaks found.

5. Replace AC condenser dryer (WP 0025).

6. Evacuate system (WP 0050).

7. Charge system (WP 0050).

8. Start engine.

9. Operate AC system for 5 to 10 minutes at

high blower speed (WP 0004).

10. Go to Step 5 of this fault.

(b) If AC condenser dryer sight glass indicates

system is fully charged, go to Step 5 of this

fault.

HEMAC177

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