Infiniti G37 Coupe. Manual — part 742
HA-14
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PRECAUTIONS
COMPONENT PARTS
FUNCTIONS OF COMPONENT PARTS
NOTE:
• Garter spring cannot be removed from cage of male-side piping.
• Indicator ring remains near piping connection point, however, this is not a malfunction. (This is to check pip-
ing connection during factory assembly.)
REMOVAL
1.
Clean piping connection point, and set a disconnector.
2.
Slide disconnector in axial direction of piping, and stretch garter spring with tapered point of disconnector.
3.
Slide disconnector farther so that inside diameter of garter spring becomes larger than outside diameter of
female-side piping flare. Then male-side piping can be disconnected.
1
Pipe (Male-side)
• Retains O-rings.
• Retains garter spring in cage (A).
2
Garter spring
Anchors female-side piping.
3
Indicator ring
When connection is made properly, this is ejected from male-side piping. (This part is no longer nec-
essary after connection.)
4
O-ring
Seals connection point. (Not reusable)
5
Pipe (Female-side)
• Seals connection by compressing O-rings.
• Anchors piping connection using flare (B) and garter spring.
RJIA4383J
SJIA0106E
PRECAUTIONS
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INSTALLATION
1.
Clean piping connection points, and insert male-side piping into female-side piping.
2.
Push inserted male-side piping harder so that female-side piping flare stretches garter spring.
3.
Garter spring seats on flare if inside diameter of garter spring becomes larger than outside diameter of
female-side piping flare. Then, it fits in between male-side piping cage and female-side piping flare to
anchor piping connection point.
NOTE:
When garter spring seats on flare, and fits in between male-side piping cage and female-side piping flare,
it clicks.
CAUTION:
• Female-side piping connection point is thin and easy to deform. Slowly insert the male-side pip-
ing straight in axial direction.
• Insert piping securely until a click is heard.
• After piping connection is completed, pull male-side piping by hand to make sure that connec-
tion does not come loose.
NOTE:
One-touch joint connection is used in points below.
• Low-pressure flexible hose to low-pressure pipe 2 (O-ring size: 16)
• Low-pressure pipe 1 to low-pressure pipe 2 (O-ring size: 16)
• High-pressure flexible hose to condenser pipe assembly (O-ring size: 12)
• High-pressure pipe 1 to high-pressure pipe 2 (O-ring size: 8)
• High-pressure pipe 1 to condenser pipe assembly (O-ring size: 8)
O-RING AND REFRIGERANT CONNECTION
SJIA0107E
HA-16
< PRECAUTION >
PRECAUTIONS
CAUTION:
The new and former refrigerant connections use different O-ring configurations. Never confuse O-
rings since they are not interchangeable. Refrigerant may leak at the connection if a wrong O-ring is
installed.
O-Ring Part Numbers and Specifications
F.
Former type refrigerant connection
N.
New type refrigerant connection
O.
One-touch joint
:
O-ring size
JSIIA0004ZZ
Connection type
Piping connection point
Part number
QTY
O-ring size
New
Low-pressure flexible hose to low-pressure pipe 2 (One-
touch joint)
92473 N8221
2
16
High-pressure pipe 1 to high-pressure pipe 2 (One-touch
joint)
92471 N8221
2
8
Condenser pipe assembly to high-pressure flexible hose
(One-touch joint)
92472 N8221
2
12
Condenser pipe assembly to high-pressure pipe 1 (One-
touch joint)
92471 N8221
2
8
Radiator & condenser assembly to condenser
pipe assembly
Inlet
92472 N8210
1
12
Outlet
92471 N8210
1
8
Low-pressure pipe 1 to low-pressure pipe 2
92473 N8210
1
16
Low-pressure pipe 1 to expansion valve
92473 N8210
1
16
High-pressure pipe 2 to expansion valve
92471 N8210
1
8
Compressor to low-pressure flexible hose
92474 N8210
1
19
Compressor to high-pressure flexible hose
92472 N8210
1
12
Liquid tank to radiator & condenser assembly
Inlet
92471 N8210
1
8
Outlet
1
PRECAUTIONS
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WARNING:
Check that all refrigerant is discharged into the recycling equipment and the pressure in the system is
less than atmospheric pressure. Then gradually loosen the discharge side hose fitting and remove it.
CAUTION:
Observe the following when replacing or cleaning refrigerant cycle components.
• Store it in the same way at it is when mounted on the car when the compressor is removed. Failure
to do so will cause lubricant to enter the low-pressure chamber.
• Use always a torque wrench and a back-up wrench when connecting tubes.
• Plug immediately all openings to prevent entry of dust and moisture after disconnecting tubes.
• Connect the pipes at the final stage of the operation when installing an air conditioner in the vehicle.
Never remove the seal caps of pipes and other components until just before required for connection.
• Allow components stored in cool areas to warm to working area temperature before removing seal
caps. This prevents condensation from forming inside A/C components.
• Remove thoroughly moisture from the refrigeration system before charging the refrigerant.
• Replace always used O-rings.
• Apply lubricant to circle of the O-rings shown in illustration when connecting tube. Be careful not to
apply lubricant to threaded portion.
• O-ring must be closely attached to the groove portion of tube.
• Be careful not to damage O-ring and tube when replacing the O-ring.
• Connect tube until a click can be heard. Then tighten the nut or bolt by hand. Check that the O-ring is
installed to tube correctly.
• Perform leakage test and make sure that there is no leakage from connections after connecting line.
Disconnect that line and replace the O-ring when the refrigerant leaking point is found. Then tighten
connections of seal seat to the specified torque.
Service Equipment
INFOID:0000000001675620
RECOVERY/RECYCLING EQUIPMENT
Be certain to follow the manufacturer’s instructions for machine operation and machine maintenance. Never
introduce any refrigerant other than that specified into the machine.
ELECTRICAL LEAK DETECTOR
Be certain to follow the manufacturer’s instructions for tester operation and tester maintenance.
VACUUM PUMP
Former
Refrigerant pressure sensor to liquid tank
J2476 89956
1
10
Expansion valve to evaporator
Inlet
92475 71L00
1
12
Outlet
92475 72L00
1
16
Name
: Nissan A/C System Oil Type S
Connection type
Piping connection point
Part number
QTY
O-ring size
RHA861F
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