Compressor Clutch: Adjustments

1. Set the A/C compressor on a level surface.




2. Check the resistance between the clutch field coil electrical connector and a ground with Rotunda 73 Digital Multimeter 105-R0051 or equivalent. The resistance should be approximately 3 to 4 ohms at 20°C (68°F). If the resistance is not as specified, replace the A/C clutch field coil.
3. Set the measuring probe of Dial Indicator/Magnetic Base D78P-4201-B or equivalent on the clutch hub surface.




4. Apply 12 volts to the clutch field coil electrical connector.
5. The clutch hub to A/C clutch pulley clearance is equal to the difference between the dial indicator readings when applying and removing 12 volts. Clearance should be between 0.4-0.5mm (0.016-0.019 inch). Add or remove shims as necessary.