Compressor Clutch: Service and Repair

Compressor Clutch: Removal and Installation

Magnet Clutch Assembly










NOTE:

Illustrations for removal and installation are shown with the compressor out of the vehicle for clarity.

Removal

1) Remove the engine room cover (VQ40DE only). Refer to [Engine Room Cover: Removal and Installation] Service and Repair.
2) Remove the cooling fan. Refer to [Cooling Fan: Removal and Installation (Crankshaft driven type)] Crankshaft Driven Type (QR25DE), [Engine Cooling Fan: Removal and Installation (Crankshaft driven type)] Crankshaft Driven Type (VQ40DE).
3) Remove the center bolt while holding the clutch disc stationary using Tool as shown.











4) Remove the clutch disc and shims.

CAUTION:
Retain the shims for installation.

5) Remove the snap ring using a suitable tool.





6) Remove the pulley using Tool (A) (QR25DE), or suitable tool (A) (VQ40DE).











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 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 and snap ring using a suitable tool.






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

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 all of 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.
7) Install the cooling fan. Refer to [Cooling Fan: Removal and Installation (Crankshaft driven type)] Crankshaft Driven Type (QR25DE), [Engine Cooling Fan: Removal and Installation (Crankshaft driven type)] Crankshaft Driven Type (VQ40DE).
8) Install the engine room cover (VQ40DE only). Refer to [Engine Room Cover: Removal and Installation] Service and Repair.

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.