Compressor Clutch: Service and Repair

Clutch Overhaul





1. Remove the center nut while holding the pressure plate.





2. Remove the armature plate by pulling it up by hand. If you can not remove it by hand, attach the puller to the armature plate, screw the bolt in the center and remove the armature plate.





3. Remove the snap ring B with a snap ring pliers.

NOTE:
- Once the snap ring B is removed, replace it with a new one.
- Do not damage the compressor body and rotor pulley.





4. Remove the pulley from the shaft with a puller and the special tool.

NOTE: Put the claws of the puller on the back of the pulley, not on the belt area; otherwise the pulley can be damaged.

5. Remove the snap ring A with a snap ring pliers. Release the field coil connector from the connector holder and disconnect the connector and field coil ground terminal.
Remove the field coil from the compressor cover.





NOTE:
- Once the snap ring A is removed, replace it with a new one.
- When installing the field coil, align the boss on the field coil with the hole in the compressor.

6. Press the rotor pulley onto the field coil with a shaft ring remover. If the rotor pulley is not set square, remove it once and push it in again checking the boss position.





CAUTION: Maximum press load: 0.4 tons.

7. Install the removed parts in the reverse order of removal, and:
- Clean the pulley and compressor sliding surfaces with non~petroleum solvent.
- Install the snap rings with the chamfered side facing out and make sure the snap rings are in the groove completely.
- After installing, make sure that the pulley turns smoothly.
- Route and clamp the wires properly or they can be damaged by the rotor pulley.


Clutch Inspection





- Check the rotor pulley bearing play and drag by rotating the rotor pulley by hand. Replace the clutch set with a new one if it is noisy or has excessive play/drag.





- Turn the rotor pulley by hand and measure the clearance between the rotor pulley and armature plate all the way around. If the clearance is not within specified limits, the armature plate must be removed and shims added or removed as required.

CLEARANCE: 0.35-0.65 mm (0.014-0.026 in)





NOTE: The shims are available in four sizes: 0.1 mm, 0.2 mm, 0.4 mm, and 0.5 mm of thickness.

- Release the compressor clutch connector from the connector holder.





Check the thermal protector for continuity.

Check the field coil for resistance.

Field Coil Resistance: 3.2 ± 0.15 ohm at 20°C (68°F)





If resistance is not within specifications, replace the field coil.