Component Maintenance Manual
EFFECTIVITY: ALL
21-00-22
Page 15002
JULY 21, 2011
14.2.4.2 Drain old oil into measuring cup to verify amount of oil being replaced.
CAUTION
: ONLY AN ENVIRO APPROVED TYPE OF OIL MAY BE USED IN THIS TYPE OF
COMPRESSOR.
CAUTION
: DO NOT OVERFILL COMPRESSOR WITH OIL OR SYSTEM PERFORMANCE WILL BE
AFFECTED.
14.2.4.3 Measure an equal amount of new oil and add to compressor. Install oil plug and
tighten.
14.2.4.4 Check system pressure per section 14.2. System is now ready for storage.
SUBTASK 21-00-22-55-002
14.3 System Off-Season/On-Aircraft Functional Tests:
NOTE
: If ambient temperature is below 50° F (10°C), the pressure switch is designed to keep the system
from operating and causing possible damage if operated for extended periods of time. In this case, it is
recommended that the aircraft be heated above this threshold to enable the system to operate.
CAUTION
: OPERATION OF THE SYSTEM AT LOW AMBIENT TEMPERATURES FOR MORE THAN 15
MINUTES CAN RESULT IN MAJOR DAMAGE OF THE R-12 COMPRESSOR.
14.3.1 During cold winter months, the system should be operated for 10-15 minutes every two
weeks to maintain a thin oil film on the compressor output shaft dynamic seal to prevent
shaft leakage.
14.3.2 Prior to turning on the air conditioning system (energizing the compressor drive), run
blowers on high speed for a minimum of 5 minutes. This will aid in warming the refrigerant
and bringing it up to an acceptable temperature enabling operation of the system.
SUBTASK 21-00-22-99F-019
14.4 General System Component Storage procedures:
14.4.1
This section defines the procedures and requirements necessary if any component is to be
stored and not installed onto the aircraft immediately. The component should be stored in a
manner that will protect it from damage and contamination in an effort to ensure component
reliability and achieve a long service life for which the component is designed
14.4.1.1 If component will be stored and not installed on the aircraft for any period of time, the
following preventive maintenance should be followed.
14.4.1.2 Component is packaged and shipped in a manner designed to keep it protected from
damage and/or contamination. Should the component not be installed in an aircraft
immediately, it is desirable that it remain sealed and packaged in the original Enviro
Systems container. This will ensure maximum protection during the storage period.
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