EXPANSION VALVE (QUENCH) - TM-9-4120-428-140249

TM 9-4120-428-14

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DIRECT SUPPORT MAINTENANCE

AIR CONDITIONER, HORIZONTAL, COMPACT

(NSN 4120-01-502-1319)

EXPANSION VALVE (QUENCH)

INITIAL SETUP:

Flush Bushing

Tools

Self-locking nuts (2)

Refrigeration Unit Service Tool Kit, WP 0000 00, Item

Equipment Condition

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).

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