TM 9-2320-280-34
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 Lubricating Oil
d. Flushing System
INITIAL SETUP:
Applicable Models
General Safety Instructions
M997, M997A1
Always wear eye protection when
around R-12.
Tools
Exercise extreme care when handling R-12.
General mechanic's tool kit:
Never smoke where R-12 is used or stored.
automotive (Appendix G, Item 1)
Ensure adequate ventilation whenever R-12
Flushing cylinder (Appendix G, Item 103)
is discharged.
Flush gun (Appendix G, Item 104)
Exposure to R-12 may be hazardous for
Vacuum pump (Appendix G, Item 105)
individuals with cardiac rhythm
abnormalities.
Special Tools
Do not attempt to connect servicing
Compressor tool kit (Appendix G, Item 101)
equipment while engine is running, and
Test Equipment
hoses must be clear of any moving
engine parts.
Manifold gauge set (Appendix G, Item 137)
Make sure hand valves on manifold gauge
Materials/Parts
set are closed during connection.
O-ring (Appendix E, Item 133)
Do not disconnect hoses before back-seating
Lubricating oil (Appendix B, Item 35)
service valves.
Refrigerant R-12 (Appendix B, Item 42)
Eye protection must be worn when using
Nitrogen (Appendix B, Item 37)
compressed air.
Flushing agent (Appendix B, Item 15)
Make sure high side service valve on
manifold gauge set is in OFF/CLOSED
Manual References
position during charging.
TM 9-2320-280-10
Avoid breathing R-12. Be sure
TM 9-2320-280-20
the work area is properly ventilated in
TM 9-2320-280-24P
case of accidental release into the
nearby atmosphere.
Maintenance Level
Direct support
WARNING
Always wear eye protection around R-12, or when servicing the
air-conditioning system. Injury will result if R-12 comes in contact
with eyes.
Exercise extreme care when handling R-12; direct skin contact
between R-12 may cause frostbite.
Never smoke in areas where R-12 is used or stored. Injury to
personnel may result.
Avoid breathing R-12. Ensure adequate ventilation whenever 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
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.
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