300Tdi Defender A/C Expansion Valve - Left Hand Drive
AIR CONDITIONING
9
REPAIR
EXPANSION VALVE - LH DRIVE
Service repair no - 82.25.01
Remove
1. Remove heater/cooler unit
See Heater/cooler
unit.
2. Suitably support unit on a bench to prevent
damage to heater matrix pipes.
3. Remove 7 screws securing outlet duct to
heater/cooler unit.
4. Break sealing compound around edge of duct
and pull duct from unit.
5. Remove all fixing screws securing top cover
seam and cover sides to main casing.
6. Remove 4 screws and 4 nuts from top of cover.
7. Break sealing compound from unit casing and
top cover.
8. Lift off top cover, release grommet and feed
blower motor wiring and air flap operating rod
through respective apertures. Note thermostat
temperature probe which is inserted in top of
evaporator.
9. Release 2 clips securing expansion valve sensor
and lagging to low pressure pipe.
10. Unscrew union securing expansion valve to
evaporator high pressure pipe.
11. Remove expansion valve, complete with high
pressure pipe.
12. Disconnect high pressure pipe from expansion
valve.
13. Discard all pipe connection ’O’ rings.
14. Clean sealing compound from all joints of main
casing, top cover and outlet duct.
Refit
15. Coat unions, threads and new ’O’ rings with
refrigerant oil prior to reassembly.
16. Fit high pressure pipe to new expansion valve.
17. Fit expansion valve to evaporator pipe
connector.
18. Position valve sensor at low pressure pipe and
secure with lagging and clips.
19. Apply sealing compound around top edge of
main casing.
20. Feed blower motor wiring through top cover and
fit grommet.
21. Fit top cover to casing. Ensure thermostat
temperature probe is inserted in top of
evaporator. Apply mastic sealant to air flap
operating rod aperture.
22. Apply sealing compound to joint face of blower
motor outlet duct.
23. Locate duct over blower motor outlet and secure
to casing.
24. Fit heater/cooler unit
See Heater/cooler unit.
