Nissan Maxima Service and Repair Manual: Removal and installation

COMPRESSOR

Removal and Installation for Compressor

REMOVAL

CAUTION: Before servicing, turn the ignition switch off, disconnect both battery terminals and wait at least three minutes.

1. Disconnect the battery negative and positive terminals. Refer to PG-67, "Removal and Installation (Battery)"
2. Discharge the refrigerant. Refer to HA-28, "Recycle Refrigerant".
3. Partially drain the engine cooling system. Refer to CO-11, "Changing Engine Coolant".
4. Remove the front RH wheel and tire using a power tool. Refer to WT-60, "Adjustment".
5. Remove the engine under cover. Refer to EXT-15, "Exploded View".
6. Remove the RH fender protector side cover and the RH fender protector. Refer to EXT-24, "Removal and Installation".
7. Remove the engine room cover.
8. Remove the air cleaner assembly. Refer to EM-24, "Removal and Installation".
9. Remove the upper radiator hose.
10. Remove the battery and battery tray. Refer to PG-68, "Removal and Installation (Battery Tray)".
11. Remove the engine cooling fan and shroud assembly. Refer to CO-16, "Removal and Installation".
12. Disconnect the high-pressure flexible hose and low-pressure flexible hose from the compressor. CAUTION: Cap or wrap the joint of the hose with suitable material such as vinyl tape to avoid the entry of air.
13. Reposition the power steering hose out of the way.
14. Disconnect the harness connector from the compressor.
15. Release the drive belt tension and reposition the drive belt off of the compressor clutch pulley. Refer to EM-14, "Removal and Installation".
16. Remove the RH compressor bolts.
17. Remove the front compressor bolts using a power tool.
18. Disconnect the compressor wire harness clip from the compressor.
19. Remove the compressor.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• For installation, tighten the compressor bolts in the order as shown.
• Do not reuse O-rings.
• Apply A/C oil to the O-rings of the low-pressure flexible hose and high-pressure flexible hose for installation.
• After charging the A/C refrigerant, check for leaks. Refer to HA-33, "Inspection".

Removal and Installation for Compressor Clutch

1. Magnetic clutch assembly
2. Clutch disk
3. Snap ring
4. Pulley
5. Magnet coil
6. Compressor

NOTE: Illustrations shown with the compressor out of the vehicle are for clarity, it is not necessary to remove the compressor.

REMOVAL

1. Remove the front wheel and tire (RH). Refer to WT-60, "Adjustment".
2. Remove the engine under cover. Refer to EXT-15, "Exploded View".
3. Release the drive belt from the A/C pulley. Refer to EM-14, "Removal and Installation".
4. Reposition the power steering line aside, do not disconnect the power steering line.
5. Remove the center bolt by holding the clutch disc steady using a suitable tool.
6. Remove the clutch disc and shims.

CAUTION: Retain all the shims for installation.

7. Remove the snap ring using a suitable tool as shown

8. Remove the pulley assembly using a suitable tool (A) as shown.

CAUTION:

• To prevent deformation of the pulley groove, the puller claws should be hooked under (not into) the pulley groove.

9. Disconnect the magnet coil harness.
10. Remove the three magnet coil screws using a suitable tool as shown, then remove the magnet coil.

INSPECTION AFTER REMOVAL

• Shim (1)
• Snap ring (2)
• Clutch disc (3)
• Pulley (4)
• Magnet coil (5)
• Center bolt (A)
• Magnet coil screws (B)

Clutch Disc

If the contact surface shows signs of damage due to excessive heat, replace the clutch disc and pulley.

Pulley

Check the appearance of the pulley assembly. If the contact surface of the pulley shows signs of excessive grooving, replace the clutch disc and pulley. The contact surfaces of the pulley assembly should be cleaned with a suitable solvent before installation.

Magnet Coil

Check the magnet coil for a loose connection or cracked insulation. Replace as necessary.

INSTALLATION

1. Install the magnet coil by aligning the magnet coil pin (A) with the hole (B) in the compressor front head as shown, then install the magnet coil screws.

• : Front

CAUTION:

• Be sure to align the magnet coil pin with the hole in the compressor front head.

2. Connect the magnet coil harness.
3. Install the pulley assembly using Tool and a wrench as shown, then install the snap ring using a suitable tool.

Tool number : - (J-38873-A)

4. Install the clutch disc (1) on the drive shaft, together with all of the original shim(s) (2) using a suitable tool (A).

5. Install the center bolt using suitable tool.

Center bolt : 12 N*m (1.2 kg-m, 9 ft-lb)

• After tightening the center bolt to specification, check that the pulley rotates smoothly.

6. Reposition the power steering line back into position, do not disconnect the power steering line.
7. Install the drive belt back onto the A/C pulley. Refer to EM-14, "Removal and Installation".
8. Install the engine under cover. Refer to EXT-15, "Exploded View".
9. Install the front wheel and tire (RH). Refer to WT-60, "Adjustment".

INSPECTION AFTER INSTALLATION

Check the clearance (B) all the way around between the clutch disc (1) and pulley (2) using a suitable tool (A) as shown.

Clutch disc-to-pulley clearance (B) : 0.3 - 0.6 mm (0.012 - 0.024 in)

If the specified clearance (B) is not obtained, replace the adjusting shim(s) and recheck the clearance (B) as shown.

BREAK-IN OPERATION

When replacing compressor clutch assembly, always conduct the break-in operation. This is done by engaging and disengaging the clutch about 30 times. Break-in operation raises the level of transmitted torque.

• Cooler pipe and hose
• Condenser
• Heater & cooling unit assembly