REPAIR - TM-9-4120-428-140192

TM 9-4120-428-14

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Testing - Continued

3. Check for continuity between each pin in the connector plug (1) and coil (4) casing. If continuity is found, the coil is

grounded and should be replaced.

4. If continuity checks are satisfactory, apply 28 Volts DC from an external power supply across pins A and B in the

connector plug. Listen for a sharp click when the valve changes position. If a click is not heard, internal valve

problems are indicated and the entire valve should be replaced. If this occurs, contact your supervisor.

REPAIR

The only authorized repair to the solenoid valve is coil replacement. The coil can be replaced without opening the

refrigeration pressure system.

WARNING

Do not attempt to disassemble the solenoid valve, other than coil removal, with a

refrigerant charge in the system. Refrigerant can be sprayed dangerously from the unit.

Ensure the screws that attach the tube and plunger assembly to the valve body are

securely fastened.

REMOVAL

1. Remove the top nut (2), coil (4), data plate (3), and connector plug (1) from the unit.

2. Cut plastic tie-down straps (5) as necessary to remove the solenoid valve cable.

3. Remove the connector plug (1) from the coil (4) leads.

INSTALLATION

1. Attach the connector plug (1) to the coil leads (4).

2. Place the coil assembly (4) and the data plate (3) onto the valve body (6) and secure with a nut (2).

3. Reconnect the connector plug (1).

4. Secure the wires to existing harnesses with new plastic tie-down straps (5).

NOTE

FOLLOW-ON MAINTENANCE:

Install top rear panel (WP 0019 00)

END OF WORK PACKAGE

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