EXPANSION VALVE (PRIMARY) REPLACEMENT

TM 9-4120-428-14

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DIRECT SUPPORT MAINTENANCE

AIR CONDITIONER, HORIZONTAL, COMPACT

(NSN 4120-01-502-1319)

EXPANSION VALVE (PRIMARY) REPLACEMENT

INITIAL SETUP:

Equipment Condition

Tools

Remove top panel (WP 0061 00)

Refrigeration Unit Service Tool Kit, WP 0000 00, Item

Remove dehydrator (WP 0075 00)

Purge refrigerant system (WP 0066 00)

Materials/Parts

Expansion Valve

Tie Down Straps

Insulation Tape, WP 0000 00, Item 1

REPLACEMENT

1. Unwrap insulation from the thermal bulb (1).

2. Loosen all hardware in the thermal bulb clamps (2) and slip the bulb (1) out of the clamps.

3. Cut the plastic tie-down strap (3) holding capillary tubing coil to the tubing.

4. De-braze three tube connections (4) to the valve (WP 0067 00).

5. Remove the valve (5) from the unit.

6. Place the expansion val ve (5) in the unit and align the tubing ends (4).

7. Braze the joints (WP 0067 00).

8. Install the thermal bulb (1) in the clamps (2) and tighten the hardware.

9. Rewrap insulation at the thermal bulb (1).

10. Carefully coil the capillary tubing and secure with a plastic tie-down strap.

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