Air Conditioning (A/C) Clutch Air Gap Adjustment

SPECIAL TOOL(S)

Courtesy of FORD MOTOR CO.	Tire and Wheel Runout Gauge Set 164-R2724 or equivalent
Courtesy of FORD MOTOR CO.	Holding Fixture, Compressor Clutch 412-103 (T95L-19703-AH)

NOTE: The A/C clutch air gap must be measured and adjusted, using the correct method, to make sure of correct A/C function. An A/C clutch air gap that is greater than specifications may reduce A/C compressor performance, cause the A/C compressor to be inoperative or cause premature wear of the A/C clutch disc and hub and A/C compressor pulley. An A/C clutch air gap that is less than specifications may cause the A/C compressor to operate continuously, or cause premature wear of the A/C clutch disc and hub and A/C compressor pulley.

1. Remove the A/C compressor. For additional information, refer to CLIMATE CONTROL .
2. Install the runout gauge set.
   1. Clamp the runout gauge set on the compressor-mounting boss.
   2. Position the runout gauge set to contact the disc portion of the A/C clutch disc and hub assembly, and tighten the flex-arm.
      Fig 1: Positioning Runout Gauge Set

      Courtesy of FORD MOTOR CO.
3. Using 2 fused jumper wires, connect the A/C clutch field coil to the power and ground from a 12V power supply.
4. Adjust the runout gauge to the ZERO position with the A/C clutch engaged.
5. Disconnect the compressor clutch field coil from the 12V power supply.
NOTE: When the 12V power supply is disconnected from the A/C clutch field coil, the clutch air gap measurement will be displayed on the runout gauge.
Fig 2: Identifying Clutch Air Gap Measurement
Courtesy of FORD MOTOR CO.
6. Record the clutch air gap measurement shown on the runout gauge.
7. Repeat the measurement on 2 additional, equally spaced places on the A/C clutch disc and hub assembly.
8. Remove the runout gauge set from the A/C compressor.
   • If the clutch air gap is within specification, install the A/C compressor. For additional information, refer to CLIMATE CONTROL .
   • If the clutch air gap is not within specification, proceed with A/C clutch air gap adjustment.
9. Remove the A/C clutch disc and hub bolt.
   1. Hold the A/C clutch disc and hub with the special tool.
   2. Remove the A/C clutch disc and hub bolt.
      Fig 3: Holding A/C Clutch Disc And Hub With Special Tool

      Courtesy of FORD MOTOR CO.
10. Remove the A/C clutch disc and hub.
    • Thread an 8 x 1.25 mm bolt into the A/C clutch disc and hub to force it from the A/C compressor shaft.
    • Lift the A/C clutch disc and hub and the A/C clutch disc and hub spacer from the A/C compressor shaft.
11. Add or remove A/C clutch disc and hub spacers based on the measurements taken.
12. Install the A/C clutch disc and hub.
13. Install the A/C clutch disc and hub bolt.
    1. Hold the A/C clutch disc and hub with the special tool.
    2. Install the A/C clutch disc and hub bolt.
       • Tighten to 13 Nm (10 lb-ft).
         Fig 4: Holding A/C Clutch Disc And Hub With Special Tool

         Courtesy of FORD MOTOR CO.
14. Repeat Steps 2 through 8 until the clutch air gap is within specification.