14-27.1. AIR-CONDITIONING SYSTEM SERVICING (R-134a)
This task covers:
a. Manifold Gauge Set Installation
e. Evacuating System
b. Manifold Gauge Set Removal
f. Charging System
g. Adding lubricating oil
d. Flushing System
General Safety Instructions
Always wear eye protection when around
Avoid breathing R-134a. Be sure the work
area is properly ventilated in case of
General mechanic's tool kit:
accidental release into the nearby
Exercise extreme care when handling
Service refrigeration unit tool kit
Ensure adequate ventilation whenever
R-134a is discharged.
Do not attempt to connect servicing
equipment while engine is running, and
hoses must be clear of any moving engine
Ensure hand valves on manifold gauge set
are closed during connection.
Do not disconnect hoses before back-seating
Eye protection must be worn when using
Ensure high side service valve on manifold
gauge set is in OFF/CLOSED position
Do not vent R-134a into the atmosphere.
Recover all refrigerant in a reusable
Never smoke where R-134a is used
Exposure to R-134a may be hazardous for
individuals with cardiac rhythm
Hood raised and secured (TM 9-2320-387-10).
Avoid breathing R-134a. The gas will irritate the nose, throat,
and lungs. In addition, because R-134a is heavier than air, it
can displace oxygen in a confined and a poorly ventilated area.
Be sure the work area is properly ventilated in case of
accidental release into the nearby atmosphere.
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
Ensure adequate ventilation whenever R-134a is being
discharged. Injury to personnel may result if used in a confined
Do not attempt to connect servicing equipment while engine is
running. Injury to personnel or damage to equipment may
Personnel with a history of cardiac rhythm abnormalities
should be made aware of potential aggravation as a result of
exposure to R-134a. Failure to do so may result in injury to
Never smoke in areas where R-134a is used or stored. Injury to
personnel may result.