TM 9-4120-408-14
5-28. EVAPORATOR COIL MAINTENANCE
This task covers:
Service
Repair
Remove
Install
INITIAL SETUP:
Tools
Materials/Parts (Continued)
Tool Kit, Service Refrigeration Unit, Appendix
Nitrogen, Appendix E, Item 18
B, Section III, Item 1
Dehydrator, Appendix G, Item 2
Recovery and Recycling Unit, Appendix B,
Section III, Item 7
Lock Washers, Appendix G, Item 14 (Dehydrator)
Regulator, Nitrogen, Appendix B, Section III,
Refer to TM 9-4120-408-24P for part numbers of
Item 9
items to be replaced.
Cleaning Set, Fin, Appendix B, Section III,
Equipment Conditions
Item 11
Air Conditioner shut down, paragraph 2-5.
Manifold Gage, Charging and Testing, Appendix
Front (Air Inlet) E2I/RFI Ventilation Panel
removed, paragraph 4-29.
Leak Detector, Appendix B, Section III,
Item 17
Evaporator Fan Assembly removed, paragraph
5-18.
Materials/Parts
Differential Pressure Switch removed,
Adhesive, Appendix E, Item 2
Brazing Alloy, Appendix E, Item 5
Evaporator Tubing and Fittings removed,
Brazing Alloy, Appendix E, Item 6
General Safety Instructions
Tetrafluoroethane, Appendix E, Item 9
Do not work on equipment without
Flux, Appendix E, Item 11
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. Service.
(1) Clean debris, dirt, or other obstructions from evaporator coil (Figure 5-25, 1).
(2) Using fin comb, straighten any bent fins on evaporator coil (1).
b. Remove.
(1) Remove six screws (2).
(2) Disconnect cap of cap and chain (3) and remove lock nut (4) and split ring (5).
(3) Remove insulation. material (6), between evaporator coil (1) and top of evaporator housing (7), as required.
Change 1 5-68
