Evaporator and Expansion Valve

Evaporator and Expansion Valve
Evaporator
Expansion valve

Remove


WARNING: Wear eye and hand protection when disconnecting components containing refrigerant. Plug all exposed connections immediately.


1. Remove heater and cooler unit.







2. Disconnect 2 Lucar connectors from thermostat.
3. Position wiring aside.
4. Remove 2 screws securing heater pipe bracket and position pipes aside.
5. Remove 10 clips retaining upper and tower casings.
6. Remove 5 screws retaining upper casing.
7. Remove lower casing and evaporator.







8. Remove 4 clips securing evaporator top cover.
9. Remove evaporator top cover.
10. Remove thermostat sensor from evaporator matrix.
11. Remove evaporator assembly from lower casing.
12. Remove bulkhead seal from case.

Expansion valve







13. Remove insulation from evaporator and expansion valve connections.
14. Remove expansion valve sensor retaining clip.
15. Unscrew 2 pipe unions. Discard 'O' ring seals.


CAUTION: Use a second wrench to support pipe adapters and plug connections.


16. Remove expansion valve.
17. Unscrew pipe union. Discard 'O' ring seal.
18. Remove evaporator pipe.

Refit
19. Reverse removal procedure. Use new 'O' rings, insulation and bulkhead seal.


NOTE: Use refrigerant oil on all 'O' rings and mating surfaces. Tighten connections.


20. Wrap all exposed metal at hose connections with prestite tape.
21. Evacuate and recharge system. See, Refrigerant Recovery Recycling Recharging Service and Repair
22. Leak test any disturbed joints. See, Leak Test System Testing and Inspection
23. Perform a functional check.
24. Disconnect service unit.