TM 9-4120-408-14
5-26. THERMOEXPANSION VALVE (TEV) MAINTENANCE
This task covers:
Remove
Install
Test and Adjust
INITIAL SETUP:
Tools
Materials/Parts (Continued)
Tool Kit, Service Refrigeration Unit,
Strap, Tiedown, Appendix E, Item 23
Tape, Appendix E, Item 28
Recovery and Recycling Unit, Appendix B,
Section III, Item 7
Dehydrator, Appendix G, Item 2
Regulator, Nitrogen, Appendix B,
Lock Washers, Appendix G, Item 14
Section III, Item 9
Manifold Gage, Charging and Testing,
Refer to TM 9-4120-408-24P for part
numbers of items to be replaced.
Leak Detector, Appendix B, Section III,
Item 17
Equipment Conditions
Materials/Parts
Air Conditioner shut down, paragraph 2-5.
Adhesive, Appendix E, Item 3
Refrigerant recovered, paragraph 5-5.
Brazing Alloy, Appendix E, Item 5
Evaporator Fan Assembly removed, paragraph
5-18.
Brazing Alloy, Appendix E, Item 6
Equalizer Line Tube Assembly disconnected,
Tetrafluoroethane, Appendix E, Item 9
Flux, Appendix E, Item 11
General Safety Instructions
Nitrogen, Appendix E, Item 18
Do not work on equipment without
Plastic Material, Appendix E, Item 20
following standard shop safety precautions.
CAUTION
Dehydrator must be replaced every time the air conditioner lines are exposed to the atmosphere.
Failure to obey this caution may result in equipment damage.
a. Remove.
NOTE
Insulation material must be removed from suction line tube assembly prior to removal of TEV sensing
bulb.
(1) Remove insulation from suction line tube assembly (Figure 5-22, 1).
(2) Remove two nuts (2), screws (3), and clamp (4) securing TEV sensing bulb (5) to side of suction line tube
assembly (1). Remove and discard tiedown straps.
(3) Loosen two flare nuts (6) and remove TEV (7).
Change 1 5-61
