Nissan Pathfinder (2005 year). Instruction — part 352
PRECAUTIONS
MTC-7
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D
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MTC
2005 Pathfinder
O-RING AND REFRIGERANT CONNECTION
A/C Compressor and Condenser
WJIA1253E
MTC-8
PRECAUTIONS
2005 Pathfinder
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 lubricant 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 lubricant to circle of the O-rings shown in illustration. Be careful not
to apply lubricant to threaded portion.
Lubricant name: Genuine NISSAN A/C System Lubricant 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.
1.
High-pressure service valve
2.
Clip
3.
High-pressure A/C pipe
4.
Refrigerant pressure sensor
5.
Condenser
6.
Compressor shaft seal
7.
High-pressure flexible A/C hose
8.
Low-pressure flexible A/C hose
9.
Low-pressure service valve
10. Low-pressure A/C pipe
11.
Expansion valve
12. A/C drain hose
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
PRECAUTIONS
MTC-9
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MTC
2005 Pathfinder
●
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.
Precautions for Servicing Compressor
EJS003UR
●
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 Lubricant Quantity in Compres-
sor” exactly. Refer to
MTC-19, "Maintenance of Lubricant Quantity in Compressor"
.
●
Keep friction surfaces between clutch and pulley clean. If the surface is contaminated with lubri-
cant, 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 lubricant 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
MTC-101, "Removal and Installation for Compressor Clutch"
.
Precautions for Service Equipment
EJS003US
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.
RHA861F
MTC-10
PRECAUTIONS
2005 Pathfinder
VACUUM PUMP
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 pres-
sure 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 instruction valve situated near the
hose-to-pump connection, as follows.
●
Usually vacuum pumps have a instruction 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 man-
ual 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 lubricant.
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 instruction or automatic) near the end of the hoses
opposite the manifold gauge.
RHA270D
SHA533D
RHA272D
PRECAUTIONS
MTC-11
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MTC
2005 Pathfinder
SERVICE COUPLERS
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
lubricants have been used with the scale. If the scale controls refrig-
erant 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.
Wiring Diagrams and Trouble Diagnosis
EJS003UT
When you read wiring diagrams, refer to the following:
●
GI-15, "How to Read Wiring Diagrams"
●
PG-4, "POWER SUPPLY ROUTING CIRCUIT"
When you perform trouble diagnosis, refer to the following:
●
GI-9, "How to Follow Trouble Diagnoses"
●
GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident"
Shut-off valve rotation
A/C service valve
Clockwise
Open
Counterclockwise
Close
RHA273D
RHA274D
MTC-12
PREPARATION
2005 Pathfinder
PREPARATION
PFP:00002
Special Service Tools
EJS003UU
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
HFC-134a (R-134a) Service Tools and Equipment
EJS003UV
Never mix HFC-134a (R-134a) refrigerant and/or the specified lubricant with CFC-12 (R-12) refrigerant and/or
the lubricant.
Separate and non-interchangeable service equipment must be used for handling each type of refrigerant/lubri-
cant.
Refrigerant container fittings, service hose fittings and service equipment fittings (equipment which handles
refrigerant and/or lubricant) are different between CFC-12 (R-12) and HFC-134a (R-134a). This is to avoid
mixed use of the refrigerants/lubricant.
Adapters that convert one size fitting to another must never be used refrigerant/lubricant 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
KLH00-PAGS0
(
—
)
NISSAN A/C System Lubricant
Type S (DH-PS)
Type: Poly alkylene glycol oil (PAG),
type S (DH-PS)
Application: HFC-134a (R-134a)
swash plate compressors (NISSAN
only)
Lubricity: 40 m
(1.4 US fl oz, 1.4 Imp
fl oz)
—
(J-43600)
Recovery/Recycling
Recharging equipment (ACR2000)
Refrigerant Recovery and Recycling
and Recharging
S-NT196
S-NT197
WJIA0293E
PREPARATION
MTC-13
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MTC
2005 Pathfinder
—
(J-41995)
Electronic refrigerant leak detector
Power supply:
●
DC 12V (battery terminal)
—
(J-43926)
Refrigerant dye leak detection kit
Kit includes:
(J-42220)
UV lamp and UV safety goggles
(J-41459)
Refrigerant dye injector
(J-41447)
HFC-134a (R-134a) Fluorescent
leak detection dye (box of 24, 1/4
ounce bottles)
(J-43872)
Refrigerant dye cleaner
Power supply:
●
DC 12V (battery terminal)
—
(J-42220)
Fluorescent dye leak detector
Power supply:
●
DC 12V (battery terminal)
For checking refrigerant leak when flu-
orescent dye is installed in A/C system.
Includes: UV lamp and UV safety gog-
gles
—
(J-41447)
HFC-134a (R-134a) Fluorescent
leak detection dye
(box of 24, 1/4 ounce bottles)
Application: For HFC-134a (R-134a)
PAG oil
Container: 1/4 ounce (7.4cc) bottle
(Includes self-adhesive dye identifica-
tion labels for affixing to vehicle after
charging system with dye.)
—
(J-41459)
HFC-134a (R-134a) Refrigerant
dye injector
Use with J-41447, 1/4 ounce bottle
For injecting 1/4 ounce of fluorescent
leak detection dye into A/C system.
—
(J-43872)
Refrigerant dye cleaner
For cleaning dye spills.
Tool number
(Kent-Moore No.)
Tool name
Description
AHA281A
ZHA200H
SHA438F
SHA439F
SHA440F
SHA441F
MTC-14
PREPARATION
2005 Pathfinder
—
(J-39183-C)
Manifold gauge set (with hoses
and couplers)
Identification:
●
The gauge face indicates R-134a.
Fitting size-Thread size
●
1/2”-16 ACME
Service hoses:
●
High side hose
(J-39500-72B)
●
Low side hose
(J-39500-72R)
●
Utility hose
(J-39500-72Y)
Hose color:
●
Low side hose: Blue with black stripe
●
High side hose: Red with black stripe
●
Utility hose: Yellow with black stripe
or green with black stripe
Hose fitting to gauge:
●
1/2”-16 ACME
Service couplers
●
High side coupler
(J-39500-20A)
●
Low side coupler
(J-39500-24A)
Hose fitting to service hose:
●
M14 x 1.5 fitting is optional or perma-
nently attached.
—
(J-39699)
Refrigerant weight scale
For measuring of refrigerant
Fitting size-Thread size
●
1/2”-16 ACME
—
(J-39649)
Vacuum pump
(Including the isolator valve)
Capacity:
●
Air displacement: 4 CFM
●
Micron rating: 20 microns
●
Oil capacity: 482 g (17 oz)
Fitting size-Thread size
●
1/2”-16 ACME
Tool number
(Kent-Moore No.)
Tool name
Description
RJIA0196E
S-NT201
S-NT202
S-NT200
S-NT203
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