Infiniti I35 (A33). Manual — part 523
O-RING AND REFRIGERANT CONNECTION
NHHA0156S02
RHA030I
CAUTION:
The new and former refrigerant connections use different O-ring configurations. Do not confuse
O-rings since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at, or
around, the connection.
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PRECAUTIONS
Precautions for Refrigerant Connection (Cont’d)
HA-5
O-Ring Part Numbers and Specifications
NHHA0156S0201
SHA814E
Connection
type
O-ring
size
Part number
D
mm (in)
W
mm (in)
New
8
92471 N8210
6.8 (0.268)
1.85 (0.0728)
Former
92470 N8200
6.07 (0.2390)
1.78 (0.0701)
New
12
92472 N8210
10.9 (0.429)
2.43 (0.0957)
Former
92475 71L00
11.0 (0.433)
2.40 (0.0945)
New
16
92473 N8210
13.6 (0.535)
2.43 (0.0957)
Former
92475 72L00
14.3 (0.563)
2.30 (0.0906)
New
19
92474 N8210
16.5 (0.650)
2.43 (0.0957)
Former
92477 N8200
17.12 (0.6740)
1.78 (0.0701)
WARNING:
Make sure 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:
When replacing or cleaning refrigerant cycle components, observe the following.
I
When the compressor is removed, store it in the same position as it is when mounted on the car.
Failure to do so will cause lubricant to enter the low pressure chamber.
I
When connecting tubes, always use a torque wrench and a back-up wrench.
I
After disconnecting tubes, immediately plug all openings to prevent entry of dirt and moisture.
I
When installing an air conditioner in the vehicle, connect the pipes as the final stage of the opera-
tion. Do not remove the seal caps of pipes and other components until just before required for
connection.
I
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.
I
Thoroughly remove moisture from the refrigeration system before charging the refrigerant.
I
Always replace used O-rings.
I
When connecting tube, apply lubricant to circle of the O-rings shown in illustration. Be careful not
to apply lubricant to threaded portion.
Lubricant name: Nissan A/C System Oil Type S
Part number: KLH00-PAGS0
I
O-ring must be closely attached to dented portion of tube.
I
When replacing the O-ring, be careful not to damage O-ring and tube.
I
Connect tube until you hear it click, then tighten the nut or bolt by hand until snug. Make sure that
the O-ring is installed to tube correctly.
I
After connecting line, conduct leak test and make sure that there is no leakage from connections.
When the gas leaking point is found, disconnect that line and replace the O-ring. Then tighten
connections of seal seat to the specified torque.
PRECAUTIONS
Precautions for Refrigerant Connection (Cont’d)
HA-6
RHA861F
Precautions for Servicing Compressor
NHHA0157
I
Plug all openings to prevent moisture and foreign matter from entering.
I
When the compressor is removed, store it in the same position as it is when mounted on the car.
I
When replacing or repairing compressor, follow “Maintenance of Lubricant Quantity in Compres-
sor” exactly. Refer to HA-109.
I
Keep friction surfaces between clutch and pulley clean. If the surface is contaminated, with
lubricant, wipe it off by using a clean waste cloth moistened with thinner.
I
After compressor service operation, turn the compressor shaft by hand more than five turns in
both directions. This will equally distribute lubricant inside the compressor. After the compressor
is installed, let the engine idle and operate the compressor for one hour.
I
After replacing the compressor magnet clutch, apply voltage to the new one and check for normal
operation.
Precautions for Service Equipment
NHHA0158
RECOVERY/RECYCLING EQUIPMENT
NHHA0158S01
Be certain to follow the manufacturers instructions for machine
operation and machine maintenance. Never introduce any refriger-
ant other than that specified into the machine.
ELECTRONIC LEAK DETECTOR
NHHA0158S02
Be certain to follow the manufacturer’s instructions for tester opera-
tion and tester maintenance.
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
PRECAUTIONS
Precautions for Refrigerant Connection (Cont’d)
HA-7
RHA270DA
VACUUM PUMP
NHHA0158S03
The lubricant contained inside the vacuum pump is not compatible
with the specified lubricant for HFC-134a (R-134a) A/C systems.
The vent side of the vacuum pump is exposed to atmospheric
pressure. So the vacuum pump lubricant may migrate out of the
pump into the service hose. This is possible when the pump is
switched off after evacuation (vacuuming) and hose is connected
to it.
To prevent this migration, use a manual valve placed near the
hose-to-pump connection, as follows.
I
Usually vacuum pumps have a manual isolator valve as part
of the pump. Close this valve to isolate the service hose from
the pump.
I
For pumps without an isolator, use a hose equipped with a
manual shut-off valve near the pump end. Close the valve to
isolate the hose from the pump.
I
If the hose has an automatic shut off valve, disconnect the
hose from the pump. As long as the hose is connected, the
valve is open and lubricating oil may migrate.
Some one-way valves open when vacuum is applied and close
under a no vacuum condition. Such valves may restrict the pump’s
ability to pull a deep vacuum and are not recommended.
SHA533D
MANIFOLD GAUGE SET
NHHA0158S04
Be certain that the gauge face indicates R-134a or 134a. Be sure
the gauge set has 1/2
″
-16 ACME threaded connections for service
hoses. Confirm the set has been used only with refrigerant HFC-
134a (R-134a) and specified lubricants.
RHA272D
SERVICE HOSES
NHHA0158S05
Be certain that the service hoses display the markings described
(colored hose with black stripe). All hoses must include positive
shut off devices (either manual or automatic) near the end of the
hoses opposite the manifold gauge.
RHA273D
SERVICE COUPLERS
NHHA0158S06
Never attempt to connect HFC-134a (R-134a) service couplers to
an CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers
will not properly connect to the CFC-12 (R-12) system. However, if
an improper connection is attempted, discharging and contamina-
tion may occur.
Shut-off valve rotation
A/C service valve
Clockwise
Open
Counterclockwise
Close
PRECAUTIONS
Precautions for Service Equipment (Cont’d)
HA-8
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