2006 INFINITI QX56 Factory Service Manual

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Page 409 of 3383

INFINITI QX56 2006 Factory Service Manual ATC-8
PRECAUTIONS
Revision: November 20092006 QX56
O-RING AND REFRIGERANT CONNECTION
Front A/C Compressor and Condenser
WJIA1578E

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INFINITI QX56 2006 Factory Service Manual PRECAUTIONSATC-9
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Revision: November 2009 2006 QX56
Rear A/C
1. High-pressure service valve 2. Grommet3. High-pressure pipe
4. Refrigerant pressure sensor 5. Condenser 6. Co

Page 411 of 3383

INFINITI QX56 2006 Factory Service Manual ATC-10
PRECAUTIONS
Revision: November 20092006 QX56
CAUTION:
The new and former refrigerant connections use different O-ring configurations. Do not confuse O-
rings since they are not interchangeable.

ATC-10
PRECAUTIONS
Revision: November 20092006 QX56
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.
O-Ring Part Numbers and Specifications
*: Always check with the Parts Department for the latest parts information.
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.
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 oil to enter the low pressure chamber.
When connecting tubes, always use a torque wrench and a back-up wrench.
After disconnecting tubes, immediately plug all openings to prevent entry of dirt and moisture.
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.
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.
Thoroughly remove moisture from the refrigeration system before charging the refrigerant.
Always replace used O-rings.
When connecting tube, apply oil to circle of the O-rings shown in illustration. Be careful not to
apply oil to threaded portion.
Oil name: NISSAN A/C System Oil Type S (DH-PS) or equivalent
Part number: KLH00-PAGS0
O-ring must be closely attached to dented portion of tube.
When replacing the O-ring, be careful not to damage O-ring and tube.
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.
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 con-
nections of seal seat to the specified torque.
Connec-
tion typeO-ring
size Part number* D mm (in) W mm (in)
New 8 92471 N8210 6.8 (0.268) 1.85 (0.0728)
Former 10 J2476 89956 9.25 (0.3642) 1.78 (0.0701) New 1292472 N8210 10.9 (0.429) 2.43 (0.0957)
Former 92475 71L00 11.0 (0.433) 2.4 (0.094) New 1692473 N8210 13.6 (0.535) 2.43 (0.0957)
Former 92475 72L00 14.3 (0.563) 2.3 (0.091) New 1992474 N8210 16.5 (0.650) 2.43 (0.0957)
Former 92477 N8200 17.12 (0.6740) 1.78 (0.0701) New 24 92195 AH300 21.8 (0.858) 2.4 (0.094)
SHA814E

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INFINITI QX56 2006 Factory Service Manual PRECAUTIONSATC-11
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Revision: November 2009 2006 QX56
Precautions for Servicing CompressorEJS003WV
Plug all openings to prevent moisture and foreign matter from entering.
W

Page 413 of 3383

INFINITI QX56 2006 Factory Service Manual ATC-12
PRECAUTIONS
Revision: November 20092006 QX56
VACUUM PUMP
The oil contained inside the vacuum pump is not compatible with the
specified oil for HFC-134a (R-134a) A/C systems. The vent side of
th

Page 414 of 3383

INFINITI QX56 2006 Factory Service Manual PRECAUTIONSATC-13
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Revision: November 2009 2006 QX56
SERVICE COUPLERS
Never attempt to connect HFC-134a (R-134a) service couplers to a
CFC-12 (R-12) A/C system. The HFC-134a

Page 415 of 3383

INFINITI QX56 2006 Factory Service Manual ATC-14
PREPARATION
Revision: November 20092006 QX56
PREPARATIONPFP:00002
Special Service ToolsEJS003WY
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated

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INFINITI QX56 2006 Factory Service Manual PREPARATIONATC-15
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Revision: November 2009 2006 QX56
—
(J-41995)
Electronic refrigerant leak detector Power supply:
DC 12V (battery terminal)
—
(J-43926)
Refrigerant dy

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