Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
SPECIAL PROCEDURES
TASK 21-00-23-82-801
12.0 SPECIAL PRODECURES
SUBTASK 21-00-23-82-001
12.1 Expansion Valve Alignment:
12.1.1 The expansion valve is set at the factory, but there may be times when it must be adjusted
to assure proper refrigerant flow at the desired evaporating temperature; for example,
excessive pressure drop for long suction line runs. Any adjustment must not affect typical
suction and discharge pressures as outlined in Table 5.
12.1.2 Tools, fixtures, equipment, or consumable items required:
• Small hand tools and socket set
• Micrometer
• Scribe or wire hook
• Volt-OHM meter (digital)
• Shop air, 40 PSIG max
• Respiration mask
• External aircraft power source
• Inspection mirror
• Thermometer, 0-150° F
• Flashlight or service lamp
• R-134A service manifold and gauge set
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