Range Rover Classic. Manual — part 172
82
AIR CONDITIONING
8
REPAIR
HEATER AND COOLER UNIT
Service repair no - 86.25.21
WARNING: All work involving the service
and maintenance of air conditioning
requires special equipment, knowledge,
experience and a full awareness and adherence to
safety precautions.
Remove
1. Disconnect battery negative lead.
2. Drain engine coolant.
See COOLING SYSTEM,
Adjustment, Coolant
3. Recover refrigerant from air conditioning system.
See Adjustment, Refrigerant Recovery
Recycling Recharging
4. Remove fascia panel assembly.
See CHASSIS
AND BODY, Repair, Dash Panel Assembly
5. Release clips and disconnect coolant hoses
from heater pipes.
6. Remove securing bolt and disconnect low
pressure pipe from evaporator.
WARNING: Wear eye and hand protection
when disconnecting components
containing refrigerant. Plug all exposed
connections immediately.
7. Release ’P’ clip retaining high and low pressure
pipes.
8. Remove securing bolt and disconnect high
pressure pipe from evaporator.
9. Discard ’O’ ring seals.
AIR CONDITIONING
9
REPAIR
10. Disconnect multiplug connecting heater to
blower unit, remove 3 screws and remove
blower unit.
11. Remove 5 screws securing casing to bulkhead
and tunnel.
12. Remove 2 securing bolts and remove centre
console front mounting bracket.
13. Disconnect 2 drain tubes..
14. Ease heater and cooler unit from its location and
remove from vehicle.
Refit
15. Ease heater and cooler unit into position.
16. Fit retaining bolts finger tight. Tighten in
sequence, centre and top bolts and then the
bottom bolt.
17. Reverse removal procedure.
18. Use new ’O’ rings and lubricate with refrigerant
oil.
19. Evacuate and recharge system.
See
Adjustment, Refrigerant Recovery Recycling
Recharging
20. Leak test any disturbed joints.
See Adjustment,
Leak Test System
21. Perform a functional check.
EVAPORATOR AND EXPANSION VALVE
Service repair no - 86.25.20 - Evaporator
Service repair no - 86.25.01 - 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.
See Heater
and Cooler Unit
82
AIR CONDITIONING
10
REPAIR
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 lower
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 connection.
See Specifications, torque, Torque Values
20. Wrap all exposed metal at hose connections with
prestite tape.
21. Evacuate and recharge system.
See
Adjustment, Refrigerant Recovery Recycling
Recharging
22. Leak test any disturbed joints.
See Adjustment,
Leak Test System
23. Perform a functional check.
24. Disconnect service unit.
AIR CONDITIONING
11
REPAIR
THERMOSTAT
Service repair no - 86.25.50
Remove
1. Remove heater and cooler unit.
See Heater
and Cooler Unit
2. Remove lower cover and evaporator.
See
Evaporator and Expansion Valve
3. Remove 5 clips and screw securing evaporator
top cover.
4. Remove evaporator top cover.
5. Remove thermostat sensor from evaporator
matrix.
6. Remove 2 screws securing sensor unit.
7. Remove thermostat and insulation.
Refit
8. Reverse removal procedure.
CAUTION: The thermostat insulation must
be installed in the ORIGINAL POSITION in
the evaporator.
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