TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 2 Download
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TM 9-2320-387-24-2 1 25 15. A/C SYSTEM SERVICING This task covers: a. Manifold Gauge Set Installation b. Manifold Gauge Set Removal c Discharging System d. Flushing System e. Evacuating System f. Charging System g. Adding Refrigerant Oil INITIAL SETUP: Applicable Models Ml114 Tools Equipment Condition Hood raised and secured (TM 9-2320-387-10). General Safety Instructions General mechanic’s tool kit: . automotive (Appendix B, Item 1) Flushing cylinder (Appendix B, Item 128) . Flush gun (Appendix B, Item 129) . Service refrigeration unit tool kit (Appendix B, Item 131) . Vacuum pump (Appendix B, Item 132) Manifold gauge set (Appendix B, Item 130) . Materials/Parts Lubricating oil (Appendix C, Item 48) Refrigerant R-134a (Appendix C, Item 56) Nitrogen (Appendix C, Item 51) Flushing agent (Appendix C, Item 30) Exercise extreme care when handling R-134a. Do not attempt to connect servicing equipment while engine is running. Ensure hand valves on manifold gauge set are closed during connection; hoses must be clear of any moving engine parts. Eye protection must be worn when using compressed nitrogen. Maintenance Level Direct support Always wear eye protection when working with R-134a. Manual References TM 9-2320-387-10 TM 9-2320-387-24P WARNING Always wear eye protection when using R-134a or when servicing the air conditioning system. Injury will result if R-134a comes in contact with eyes. Exercise extreme care when handling R-134a. Direct contact between R-134a and skin may cause frostbite. Always use recovery machine. Do not attempt to connect servicing equipment while engine is running. Injury to personnel or damage to equipment may result. NOTE Whenever any air conditioning vapor system component needs replacement, the system must be discharged, flushed, and a new dryer bottle installed (para. 25-16). 25-38