Rotating Torque Check

The rotational torque of a used A/C compressor should be checked if excessive drag is suspected.

1. Recover refrigerant. Observe all safety precautions.
2. Remove A/C manifold and tube from A/C compressor. Use care not to allow dirt to enter A/C compressor.







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 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, evacuate and charge the system.
6. Check the system for proper operation.