TM 9-4120-407-14
(1) Install two grommets (11).
(2) Carefully install evaporator coil (3) and 12 screws (10).
(3) Wrap expansion valve (9) with wet rags to prevent damage from high heat. Braze tubing (5).
See paragraph 4-14.
(4) Carefully push sensing bulb (7) into clamps (8) in position noted during removal. Tighten two
screws (6).
(5) Attach insulation (4) onto tubing (5). Wrap with insulation tape as necessary to seal.
(6) Carefully position bracket (2) in place and align mounting holes. Install two new rivets (1).
NOTE
FOLLOW-ON MAINTENANCE:
Install evaporator fan and motor. See para 3-34.
Install coil frost switch. See para 3-27.
Install mist eliminator. See para 3-17.
Install top panel. See para 3-14.
Install new refrigerant desiccant dehydrator. See para 4-20.
4-31. COMPRESSOR TESTING, REPAIR AND REPLACEMENT.
d. Installation
b. Repair
c. Removal
a. Testing
This task covers:
Tiedown Straps, Qty 4 (Item 20, Appendix G)
Service Refrigeration Unit Tool Kit
Self Locking Nuts, Qty 2 (Item 15, Appendix G)
(Item 1, Appendix B)
Lock Washers, Qty 4 (Item 7, Appendix G)
Jack (Item 2, Appendix B)
Splices, Qty 2 (Item 18, Appendix G)
Jack Stands, Qty 4 (Item 2, Appendix B)
Marker Tag (Item 2, Appendix E)
Duct removed. See para 4-8.
Two
(1) Thermostatic Switch.
( a ) Tag and disconnect wire leads (1) Figure 4-23.
NOTE
The thermostatic switch actuates (opens) at 70 + 8 F (21 + 5 C) and
resets (closes) at 50 + 5 F (10 + 3 C).
(b) Maintain the temperature at the thermostatic switch (2) to any point above 78 F (26 C).
Using a multimeter set to measure resistance, check continuity across lead (1) terminals (3).
No continuity should be indicated.
4-71
