Nissan Pathfinder (2009 year). Manual - part 444

HA-6

< PRECAUTION >

PRECAUTIONS

Front A/C Compressor and Condenser - VK56DE

AWIIA0570GB

1.

High-pressure service valve

2.

Clip

3.

Front high-pressure A/C pipe

4.

Refrigerant pressure sensor

5.

Condenser

6.

Compressor shaft seal

7.

Front high-pressure flexible A/C hose

8.

Front low-pressure flexible A/C hose

9.

Low-pressure service valve

10. Front low-pressure A/C pipe

11.

Front expansion valve

12. Front A/C drain hose

P.

Refrigerant leak checking order (a - k)

Q.

Tightening torque

R.

Wrench size

2009 Pathfinder

PRECAUTIONS

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Front A/C Compressor and Condenser - VQ40DE

S.

O-ring size

T.

Former type refrigerant connection

U.

New type refrigerant connection

Front

WJIA1399E

1.

High-pressure service valve

2.

Clip

3.

Front high-pressure A/C pipe

4.

Refrigerant pressure sensor

5.

Condenser

6.

Compressor shaft seal

7.

Front high-pressure flexible A/C hose

8.

Front low-pressure flexible A/C hose

9.

Low-pressure service valve

10. Front low-pressure A/C pipe

11.

Front expansion valve

12. Front A/C drain hose

2009 Pathfinder

HA-8

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PRECAUTIONS

Rear A/C

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

WJIA1400E

1.

Rear high- and low-pressure A/C pipes

2.

Rear heater core hoses

3.

Underfloor rear high- and low-pres-
sure A/C and heater core pipes

4.

Rear expansion valve

2009 Pathfinder

PRECAUTIONS

HA-9

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*: 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 con-
nection.

• 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 or equivalent.

• 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 refrigerant leaking point is found, disconnect that line and replace the O-ring. Then tighten
connections of seal seat to the specified torque.

Connec-
tion 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

10

J2476 89956

9.25 (0.3642)

1.78 (0.0701)

New

12

92472 N8210

10.9 (0.429)

2.43 (0.0957)

Former

92475 71L00

11.0 (0.433)

2.4 (0.094)

New

16

92473 N8210

13.6 (0.535)

2.43 (0.0957)

Former

92475 72L00

14.3 (0.563)

2.3 (0.091)

New

19

92474 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

2009 Pathfinder

HA-10

< PRECAUTION >

PRECAUTIONS

Precaution for Service of Compressor

INFOID:0000000003935697

• Plug all openings to prevent moisture and foreign matter from entering.
• When the compressor is removed, store it in the same position as it is when mounted on the car.
• When replacing or repairing compressor, follow “Maintenance of Oil Quantity in Compressor”

exactly. Refer to 

HA-27, "Maintenance of Oil Quantity in Compressor"

.

• Keep friction surfaces between clutch and pulley clean. If the surface is contaminated with oil, wipe

it off by using a clean waste cloth moistened with thinner.

• After compressor service operation, turn the compressor shaft by hand more than 5 turns in both

directions. This will equally distribute oil inside the compressor. After the compressor is installed,
let the engine idle and operate the compressor for 1 hour.

• After replacing the compressor magnet clutch, apply voltage to the new one and check for normal

operation. Refer to 

HA-41, "Removal and Installation for Compressor Clutch"

.

Precaution for Service Equipment

INFOID:0000000003935698

RECOVERY/RECYCLING EQUIPMENT

Follow the manufacturer's instructions for machine operation and machine maintenance. Never introduce any
refrigerant other than that specified into the machine.

ELECTRONIC LEAK DETECTOR

Follow the manufacturer's instructions for tester operation and tester maintenance.

VACUUM PUMP

1.

Plug

2.

O-ring

A.

Torque wrench

B.

Apply oil

C.

Do not apply oil to thread

D.

No good

E.

Good

WJIA1994E

2009 Pathfinder

PRECAUTIONS

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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
the vacuum pump is exposed to atmospheric pressure so the vac-
uum pump oil may migrate out of the pump into the service hose.
This is possible when the pump is switched off after evacuation (vac-
uuming) and hose is connected to it.
To prevent this migration, use a manual valve situated near the
hose-to-pump connection, as follows.
• Usually vacuum pumps have a manual isolator valve as part of the

pump. Close this valve to isolate the service hose from the pump.

• 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.

• 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.

MANIFOLD GAUGE SET

Be certain that the gauge face indicates HFC-134a (R-134a). Make
sure the gauge set has 1/2

″

-16 ACME threaded connections for ser-

vice hoses. Confirm the set has been used only with refrigerant
HFC-134a (R-134a) along with specified oil.

SERVICE HOSES

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.

SERVICE COUPLERS

RHA270D

SHA533D

RHA272D

2009 Pathfinder

HA-12

< PRECAUTION >

PRECAUTIONS

Never attempt to connect HFC-134a (R-134a) service couplers to a
CFC-12 (R-12) A/C system. The HFC-134a (R-134a) couplers will
not properly connect to the CFC-12 (R-12) system. If an improper
connection is attempted, discharging and contamination may occur.

REFRIGERANT WEIGHT SCALE

Verify that no refrigerant other than HFC134a (R-134a) and specified
oils have been used with the scale. If the scale controls refrigerant
flow electronically, the hose fitting must be 1/2”-16 ACME.

CHARGING CYLINDER

Using a charging cylinder is not recommended. Refrigerant may be vented into air from cylinder's top valve
when filling the cylinder with refrigerant. Also, the accuracy of the cylinder is generally less than that of an
electronic scale or of quality recycle/recharge equipment.

Shut-off valve rotation

A/C service valve

Clockwise

Open

Counterclockwise

Close

RHA273D

RHA274D

2009 Pathfinder

PREPARATION

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PREPARATION

PREPARATION

Special Service Tool

INFOID:0000000003935699

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.

HFC-134a (R-134a) Service Tool and Equipment

INFOID:0000000003935700

Never mix HFC-134a (R-134a) refrigerant and/or its specified oil with CFC-12 (R-12) refrigerant and/or its oil.
Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/oil.
Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles
refrigerant and/or oil) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid mixed
use of the refrigerants/oil.
Adapters that convert one size fitting to another must never be used refrigerant/oil contamination will occur
and compressor failure will result.

Tool number
(Kent-Moore No.)
Tool name

Description

—

(J-38873-A)
Pulley installer

Installing pulley

KV99233130
(J-29884)
Pulley puller

Removing pulley

LHA171

LHA172

Tool number
(Kent-Moore No.)
Tool name

Description 

HFC-134a (R-134a)
(

—

)

Refrigerant

Container color: Light blue
Container marking: HFC-134a (R-
134a)
Fitting size: Thread size
• large container 1/2”-16 ACME

—

(

—

)

NISSAN A/C System Oil Type S

Type: Poly alkylene glycol oil (PAG), 
type S
Application: HFC-134a (R-134a) 
swash plate compressors (NISSAN 
only)

Lubricity: 40 m

 (1.4 US fl oz, 1.4 Imp 

fl oz) 

S-NT196

S-NT197

2009 Pathfinder