Rotating Torque Check

Check the rotational torque of a used A/C compressor if excessive drag is suspected.
1. Using proper procedures, recover the refrigerant. Observe all safety precautions.
2. Remove the A/C manifold and tube from the A/C compressor.

CAUTION: Use care not to allow dirt to enter the A/C compressor. Contamination can result in component failure and damage to the A/C system.

3. With the A/C clutch disengaged, rotate the compressor shaft and note the torque required to rotate the shaft one complete revolution. Do not measure the starting torque.
4. If the rotational torque exceeds to 10 N.m (7 lb-ft), replace the A/C compressor.
5. If the rotational torque is less than specified, excessive drag does not exist in the A/C compressor. Install the A/C manifold and tube and leak test, Using proper procedures, evacuate and charge the system. Evacuation and Charging
6. Check the system for normal operation.