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TM 9-4120-428-14
DIRECT SUPPORT MAINTENANCE
AIR CONDITIONER, HORIZONTAL, COMPACT
EXPANSION VALVE (QUENCH)
INITIAL SETUP:
Flush Bushing
Tools
Self-locking nuts (2)
Refrigeration Unit Service Tool Kit, WP 0000 00, Item
Equipment Condition
1
Remove top panel (WP 0061 00)
Materials/Parts
Remove dehydrator (WP 0075 00)
Purge refrigerant system (WP 0066 00)
Expansion Valve
Tie Down Straps
Insulation Tape, WP 0000 00, Item 1
REPLACEMENT
1. Unwrap the insulation from the thermal bulb (1)
2. Loosen all hardware in the clamps (2) that hold the thermal bulb (1) in place and slip the thermal bulb out of clamps.
3. Cut the plastic tie-down strap (3) from the capillary line.
4. De-braze two tube connections (4) to the valve (5).
5. Remove two screws (6), post spacers (7), brackets (8), and self-locking nuts (9).
6. Remove the valve (5) from the unit.
7. Install the flush bushing (10) in the valve (5).
8. Place the expansion valve (5) in the unit and align the tubing ends (4).
9. Braze the joints (Para 5-12).
10. Secure the valve (5) to the housing with two screws (6), post spacers (7), brackets (8), and lock nuts (9) each.
11. Install the sensing bulb (1) into the clamps and tighten the screw and nut.
12. Re-wrap the insulation at the sensing bulb.
13. Coil any excess capillary line of the expansion valve (5) and secure with tie-down straps (3).
0078 00-1

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