Nissan Pathfinder (2012 year). Manual — part 407
REFRIGERATION SYSTEM
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recovery equipment. If an accidental system discharge occurs, ventilate the work area before resum-
ing service. Additional health and safety information may be obtained from the refrigerant and oil man-
ufacturers.
Discharging Refrigerant
Evacuating System and Charging Refrigerant
1.
Shut-off valve
2.
A/C service valve
3.
Recovery/recycling equipment
WJIA1160E
1.
Shut-off valve
2.
A/C service valve
3.
Recovery/recycling equipment
4.
Refrigerant container (HFC-134a)
5.
Refrigerant weight scale (J-39699)
6.
Vacuum pump (J-39649)
7.
Manifold gauge set with hoses and
couplers (J-39183-C)
WJIA1161E
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2012 Pathfinder
HA-38
< REMOVAL AND INSTALLATION >
COMPRESSOR
COMPRESSOR
Removal and Installation for Compressor
INFOID:0000000007356317
A/C Compressor Mounting - VK56DE
CAUTION:
Tighten the compressor bolts to specification in the order shown.
AWIIA1291GB
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COMPRESSOR
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A/C Compressor Mounting - VQ40DE
REMOVAL
1. Discharge the A/C refrigerant. Refer to
HA-36, "HFC-134a (R-134a) Service Procedure"
2. Remove the front left wheel and tire assembly. Refer to
3. Remove the front left fender protector. Refer to
EXT-25, "Removal and Installation of Front Fender Protec-
4. Reposition the crankcase ventilation hose out of the way.
5. Remove the power steering cooler hose bracket bolt (VK56DE only).
6. Remove the drive belt. Refer to
EM-152, "Removal and Installation"
(VK56DE),
(VQ40DE).
7. Disconnect the compressor harness connector.
8. Disconnect both the front high-pressure flexible A/C hose and front low-pressure flexible A/C hose from
the compressor. Refer to
CAUTION:
Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry of air.
9. Remove the A/C compressor bolts using power tools.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Tighten the compressor bolts to specification in the order shown above (VK56DE).
• Do not reuse O-rings.
• Apply A/C oil to the O-ring of the front low-pressure flexible A/C hose and front high-pressure flexi-
ble A/C hose for installation.
• After recharging the A/C system with refrigerant, check for leaks. Refer to
.
LJIA0176E
1.
Compressor
2.
Front timing chain case
3.
Rear timing chain case
4.
Cylinder block
August 2012
2012 Pathfinder
HA-40
< REMOVAL AND INSTALLATION >
COMPRESSOR
Removal and Installation for Compressor Clutch
INFOID:0000000007356318
Magnet Clutch Assembly - VK56DE
Magnet Clutch Assembly - VQ40DE
NOTE:
Illustrations for removal and installation are shown with the compressor out of the vehicle for clarity.
REMOVAL
1. For VQ40DE, remove the engine cooling fan. Refer to
CO-20, "Removal and Installation (Crankshaft
2. For VK56DE, remove the compressor. Refer to
HA-38, "Removal and Installation for Compressor"
AWIIA1286GB
1.
Magnet clutch assembly
2.
Magnet coil
3.
Pulley
4.
Clutch disc
5.
Snap ring
6.
Thermal protector (built in)
7.
Compressor
AWIIA1284GB
1.
Magnet clutch assembly
2.
Magnet coil
3.
Pulley
4.
Clutch disc
5.
Snap ring
6.
Thermal protector (built in)
7.
Compressor
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COMPRESSOR
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3. Remove the center bolt while holding the clutch disc stationary
using Tool as shown.
4. Remove the clutch disc and shims.
CAUTION:
Retain shims for installation.
5. Remove the snap ring using a suitable tool.
6. Remove the pulley using a suitable tool (A).
CAUTION:
To prevent deformation of the pulley groove, the puller
claws should be hooked under the pulley groove and not
into the pulley groove.
7. Remove the magnet coil.
• For the VK56DE engine, using a suitable tool remove the
three magnet coil screws and remove the magnet coil.
Tool number
: J-44614
WHA228
RHA072C
AWIIA1285ZZ
WHA212
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HA-42
< REMOVAL AND INSTALLATION >
COMPRESSOR
• For the VQ40DE engine, remove the magnet coil snap ring (A)
using a suitable tool and remove the magnet coil (1).
INSPECTION
Clutch Disc
If the contact surface shows signs of damage due to excessive heat, replace clutch disc and pulley.
Pulley
Check the appearance of the pulley assembly. If contact surface of pulley shows signs of excessive grooving,
replace clutch disc and pulley. The contact surfaces of the pulley assembly should be cleaned with a suitable
solvent before reinstallation.
Coil
Check magnet coil for loose connections or any cracked insulation. Replace as necessary.
INSTALLATION
1. Install the magnet coil.
• For the VK56DE engine, position the magnet coil and, using a
suitable tool, install the three magnet coil screws.
• For the VQ40DE engine, position the magnet coil (1) and
install the magnet coil snap ring (A) using a suitable tool.
CAUTION:
Be sure to align the magnet coil pin with the hole in the
compressor front head.
ALIIA0379ZZ
WHA212
ALIIA0379ZZ
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COMPRESSOR
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2. Install the pulley assembly using Tool and a wrench, then install
the snap ring using a suitable tool.
3. Install the clutch disc on the compressor shaft, together with the
original shim(s) using a suitable tool. Press the clutch disc in by
hand.
4. Install the clutch pulley bolt while using Tool to prevent the clutch
disc from turning and tighten the bolt to specification.
CAUTION:
After tightening the clutch pulley bolt, check that the clutch
pulley rotates smoothly.
5. Check the pulley clearance all the way around the clutch disc as
shown.
6. If the specified clearance is not obtained, replace the adjusting
spacer to readjust.
Tool number
: — (J-38873-A)
WJIA1016E
WHA184
Tool number
: J-44614
WHA229
Clutch disc-to-pulley clearance
: 0.3 - 0.6 mm
(0.012 - 0.024 in)
WHA194
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HA-44
< REMOVAL AND INSTALLATION >
COMPRESSOR
7. For VK56DE, install the compressor. Refer to
HA-38, "Removal and Installation for Compressor"
.
8. For VQ40DE, install the engine cooling fan. Refer to
CO-20, "Removal and Installation (Crankshaft driven
BREAK-IN OPERATION
When replacing compressor clutch assembly, always conduct the break-in operation. This is done by engag-
ing and disengaging the clutch about 30 times. Break-in operation raises the level of transmitted torque.
August 2012
2012 Pathfinder
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