Compressor Clutch: Service and Repair

A/C Clutch and A/C Compressor Clutch Pulley

SPECIAL SERVICE TOOL(S) REQUIRED








A disassembled view of the A/C clutch and related parts is shown in the illustration.















Removal

NOTE: Before disassembling the A/C compressor/clutch assembly for repair, it is important to check the A/C clutch air gap. This will help determine it the clutch is not engaging or if the A/C compressor is failing internally. Refer to Adjustments in this section.

1. Remove the clutch hub retaining bolt. Use Spanner Wrench T7OP-4067-A. Note position of the coil electrical connector.







2. Pull clutch hub and shims from compressor shaft. If hub cannot be pulled from compressor shaft, screw an 8mm bolt into the shaft hole of the clutch hub to force the hub from the shaft.








3. Remove pulley retaining snap ring.










4. Pull the pulley and A/C clutch pulley assembly from compressor.

Installation

1. Clean pulley bearing surface of A/C compressor head to remove any dirt or corrosion.

2. Install pulley and A/C compressor pulley bearing on A/C compressor. The bearing is a slip-fit on the A/C compressor head and, if properly aligned, it should slip on easily.

3. Install pulley retaining snap ring with bevel side of snap ring out.

4. Place one nominal thickness spacer shim on the end of the spli ned shaft and slide the hub on the end of the compressor shaft.

5. Thread a new 8mm hub retaining bolt into end of compressor shaft. Tighten hub retaining bolt to 11-14 N.m (8-10 lb-ft). DO NOT USE AIR TOOLS.

6. Check clutch air gap between clutch disc and pulley mating surfaces with a feeler gauge. The air gap should be between 0.35 and 0.85mm (0.014 and 0.033 inch). Check at three locations equally spaced around the A/C clutch pulley.










7. If clutch air gap is not within 0.35 to 0.85mm (0.014 to 0.033 inch), repeat Steps 4 through 6 with various thickness shims until air gap is within specified limits.

8. Leak test, evacuate and charge the A/C system.

9. When installing a new A/C clutch, cycle it ten times at idle to burnish the A/C clutch and prevent slippage.