TM-9-2320-280-34 HMMWV Direct Support & General Support Maintenance Manual Download
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TM 9-2320-280-34 Change 1 14-89 14-17. AIR-CONDITIONING SYSTEM SERVICING This task covers: a. Manifold Gauge Set Installation e. Evacuating System b. Manifold Gauge Set Removal f. Charging System c. Discharging System g. Checking/Adding Refrigerant Oil d. Flushing System ________ WARNING ________ • Always wear eye protection around FR-12 and R-12, or when servicing the air-conditioning system. Injury will result if FR-12 or R-12 comes in contact with eyes. • Exercise extreme care when handling FR-12 and R-12; direct skin contact between FR-12 or R-12 may cause frostbite. • Never smoke in areas where FR-12 or R-12 is used or stored. Injury to personnel may result. • Ensure adequate ventilation whenever FR-12 or R-12 is being discharged. Injury to personnel may result if used in a confined area. • Personnel with a history of cardiac rhythm abnormalities should be made aware of potential aggravation as a result of exposure to FR-12 or R-12. Failure to do so may result in injury to personnel. • Do not attempt to connect servicing equipment while engine is running. Injury to personnel or damage to equipment may result. INITIAL SETUP: Applicable Models _______________ M997, M997A1, M997A2 Tools ____ General mechanic's tool kit: automotive (Appendix G, Item 1) Flushing cylinder (Appendix G, Item 103) Flush gun (Appendix G, Item 104) Vacuum pump (Appendix G, Item 105) Special Tools __________ Compressor tool kit (Appendix G, Item 101) Test Equipment _____________ Manifold gauge set (Appendix G, Item 137) Materials/Parts _____________ O-ring (Appendix E, Item 106) (R-12 only) Lubricating oil (Appendix B, Item 35.1) (FR-12 only) Refrigerant FR-12 (Appendix B, Item 42.1) Lubricating oil (Appendix B, Item 35) (R-12 only) Refrigerant R-12 (Appendix B, Item 42) Nitrogen (Appendix B, Item 37) Flushing agent (Appendix B, Item 15) O-ring (Appendix E, Item 104.1) (FR-12 only) Manual References ________________ TM 9-2320-280-10 TM 9-2320-280-20 TM 9-2320-280-34P General Safety Instructions ______________________ • Always wear eye protection when around FR-12 and R-12. • Exercise extreme care when handling FR-12 and R-12. • Never smoke where FR-12 or R-12 is used or stored. • Ensure adequate ventilation whenever FR-12 or R-12 is discharged. • Exposure to FR-12 and R-12 may be hazardous for individuals with cardiac rhythm abnormalities. • Do not attempt to connect servicing equipment while engine is running, and hoses must be clear of any moving engine parts. • Make sure hand valves on manifold gauge set are closed during connection. • Do not disconnect hoses before back-seating service valves. • Eye protection must be worn when using com- pressed air. • Make sure high side service valve on manifold gauge set is in OFF/CLOSED position during charging. Maintenance Level _______________ Direct support