Infiniti QX56 (Z62). Manual — part 775
A/C UNIT ASSEMBLY
HA-41
< REMOVAL AND INSTALLATION >
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A/C UNIT ASSEMBLY
Exploded View
INFOID:0000000006276182
REMOVAL
DISASSEMBLY
1.
Heater & cooling unit assembly
2.
Steering member
3.
Instrument stay LH
4.
Instrument stay RH
5.
Blower unit assembly
for symbols in the figure.
JMIIA0628GB
HA-42
< REMOVAL AND INSTALLATION >
A/C UNIT ASSEMBLY
HEATER & COOLING UNIT ASSEMBLY
HEATER & COOLING UNIT ASSEMBLY : Removal and Installation
INFOID:0000000006276183
CAUTION:
1.
Rear heater packing
2.
A/C case RH
3.
Foot duct RH
4.
Heater core assembly
5.
Heater pipe cover
6.
Evaporator pipe cover
7.
Evaporator pipe assembly
8.
O-ring
9.
Expansion valve
10. Grommet
11.
Heater packing
12. Drain hose assembly
13. A/C case lower
14.
A/C cover
15. Evaporator
16. Intake sensor
17.
Dfroster door
18. Upper ventirator door
19. Slide door unit
20.
A/C case center
21. A/C case LH
22. Foot duct LH
23.
Aspirator
24. Aspirator hose
25. In-vehicle sensor
26.
Foot door LH
27. Foot door RH
28. Ventirator door
29.
Ventirator packing
for symbols in the figure.
JMIIA0629GB
A/C UNIT ASSEMBLY
HA-43
< REMOVAL AND INSTALLATION >
C
D
E
F
G
H
J
K
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HA
N
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Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, never perform lubricant return operation. Refer to
22, "Perform Lubricant Return Operation"
REMOVAL
1.
Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. Refer to
. (If equipped)
2.
Drain engine coolant from cooling system. Refer to
3.
Remove clamps, and then disconnect front heater outlet hose from heater pipe.
CAUTION:
• Some coolant may spill when heater hoses are disconnected.
• Close off the coolant inlet and outlet on the heater core (2 locations) with shop cloths.
4.
Remove mounting bolt, and then disconnect low-pressure pipe and high-pressure pipe from expansion
valve.
CAUTION:
Cap or wrap the joint of the A/C piping and expansion valve with suitable material such as vinyl
tape to avoid the entry of air.
5.
Remove instrument panel assembly. Refer to
IP-14, "Removal and Installation"
.
6.
Remove steering column mounting bolt and nuts. Refer to
ST-34, "Removal and Installation"
7.
Move steering column assembly to a position where it does not inhibit work.
8.
Disconnect harness clips, harness connectors, ground bolts and blackets from steering member, and then
move the vehicle harness to the position without hindrance for work.
9.
Remove mounting nuts, and then remove instrument stay (RH and LH).
10. Remove A/C unit assembly mounting bolts.
11. Remove mounting bolts, and then remove steering member from the vehicle.
12. Disconnect drain hose from A/C unit assembly, and then remove A/C unit assembly from the vehicle.
13. Remove mounting bolts, and then disconnect heater & cooling unit and blower unitassembly.
INSTALLATION
Note the following items, and install in the reverse order of removal.
CAUTION:
• Replace O-rings with new ones. Then apply compressor oil to them when installing.
• Check for leakages when recharging refrigerant. Refer to
NOTE:
Refer to
when filling radiator with engine coolant.
EVAPORATOR
EVAPORATOR : Removal and Installation
INFOID:0000000006276184
REMOVAL
1.
Remove heater & cooling unit assembly. Refer to
.
2.
Remove heater core. Refer to
HA-44, "HEATER CORE : Removal and Installation"
3.
Remove mounting screws, and then remove evaporator pipe cover.
4.
Remove air mix door motor (RH). Refer to
HAC-153, "AIR MIX DOOR MOTOR : Removal and Installa-
5.
Remove mounting screws, and then remove A/C cover.
6.
Remove foot duct LH. Refer to
VTL-11, "FLOOR DUCT 1 : Removal and Installation"
7.
Remove mounting screws, and then remove A/C lower case.
8.
Remove intake sensor. Refer to
HAC-150, "Removal and Installation"
.
9.
Remove evaporator assembly from heater & cooling unit assembly.
10. Remove mounting bolts, and then remove evaporator from evaporator assembly.
CAUTION:
Cap or wrap the joint of the evaporator and evaporator pipe assembly with suitable material such as
vinyl tape to avoid the entry of air.
HA-44
< REMOVAL AND INSTALLATION >
A/C UNIT ASSEMBLY
INSTALLATION
Note the following items, and install in the reverse order of removal.
CAUTION:
• Replace O-rings with new ones. Then apply compressor oil to them when installing.
• When install the intake sensor, set the same position before replacement.
• Never rotate the bracket insertion part when removing and installing the intake sensor.
• Perform lubricant adjusting procedure after installing new evaporator. Refer to
Adjusting Procedure for Components Replacement Except Compressor"
HEATER CORE
HEATER CORE : Removal and Installation
INFOID:0000000006276185
REMOVAL
1.
Remove heater & cooling unit assembly. Refer to
HA-42, "HEATER & COOLING UNIT ASSEMBLY :
.
2.
Remove mounting screws, and then remove heater core pipe cover.
3.
Remove mode door motor. Refer to
HAC-153, "MODE DOOR MOTOR : Removal and Installation"
4.
Remove main link, foot door link and foot door lever. Refer to
5.
Remove mounting screws, and then remove foot duct (assist side). Refer to
.
6.
Pull out heater core (1) from heater & cooling unit assembly.
INSTALLATION
Note the following items, and install in the reverse order of removal.
CAUTION:
• Replace O-rings with new ones. Then apply compressor oil ti them when installing
• Check for leakages when recharging refrigerant. Refer to
EXPANSION VALVE
EXPANSION VALVE : Removal and Installation
INFOID:0000000006276186
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, never perform lubricant return operation. Refer to
22, "Perform Lubricant Return Operation"
REMOVAL
1.
Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant. Refer to
2.
Remove A/C unit assembly. Refer to
HA-42, "HEATER & COOLING UNIT ASSEMBLY : Removal and
.
3.
Remove mounting bolts, and then remove expansion valve.
CAUTION:
Cap or wrap the joint of the evaporator pipe assembly and expansion valve with suitable material
such as vinyl tape to avoid the entry of air.
INSTALLATION
Note the following items, and install in the reverse order of removal.
JMIIA0684ZZ
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