Compressor Shaft Seal: Service and Repair

Shaft Seal Replacement

CAUTION: A shaft seal should not be replaced because a small amount of oil is found on the adjacent surface. The seal is designed to leak some oil for lubrication purposes. A shaft seal should be changed only when a large amount of sprayed oil is found and then only after actual refrigerant leakage is found by using an approved leak detection procedure. Refer to Leak Testing Refrigerant System. Leak Testing Refrigerant System

Should a compressor shaft seal ever have to be replaced, the receiver-dryer in this system must also be removed from the vehicle. The oil in the receiver-dryer must then be drained, measured and replaced. Refer to Discharging, Adding Oil, Evacuating, and Charging Procedures for A/C System.

Tools Required:
J-5403 Snap Ring Pliers
J-9553-1 O-ring Remover
J-23128-A Seal Seat Remover/Installer
J-33011 O-ring Installer
J-34614 Shaft Seal Protector

Removal
1. Disconnect the negative battery cable.
2. Recover the refrigerant. Refer to Discharging, Adding Oil, Evacuating, and Charging Procedures for A/C System.
3. Loosen and reposition the compressor in the mounting brackets.
4. Remove the clutch drive plate and hub assembly from the compressor.




5. Use the snap ring pliers J-5403 to remove the shaft seal retaining ring.
6. Thoroughly clean the inside of the compressor housing area surrounding the shaft, the exposed portion of the seal, the shaft itself, and the O-ring groove.




7. Fully engage the knurled tangs of the seal seat remover/installer J-23128-A into the recessed portion of the seal by turning the handle clockwise. Remove and discard the seal from the compressor with a rotating-pulling motion. The handle should be hand-tightened securely. Do not use a wrench or pliers to tighten the handle.
8. Remove and discard the O-ring from the compressor neck using the O-ring remover J-9553-1.
9. Thoroughly clean the seal O-ring groove in the compressor housing.




10. Inspect the shaft and the inside of the compressor housing neck for dirt or foreign material. These parts must be perfectly clean before installing any new parts.

Installation

CAUTION: Seals must not be reused. Always use a new specification service seal kit. Be sure that the seal to be installed is not scratched or damaged in any way. The seal must be free of lint and dirt that may damage the seal surface or prevent proper sealing.

1. Dip the new seal O-ring in clean Polyalkaline Glycol (PAG) refrigerant oil and assemble the O-ring onto the O-ring installer J-33011.




2. Insert the O-ring installer J-33011 into the compressor neck until the installer "bottoms." Lower the moveable slide of the O-ring installer J-33011 to release the O-ring into the seal O-ring lower groove. (The top groove of the compressor neck is for the shaft seal retainer ring.) Rotate the installer to seat the O-ring and then remove the installer.
3. Attach the shaft lip seal to the seal seat remover/installer J-23128-A. Dip the seal in clean PAG oil.




4. Install the shaft seal protector J-34614 in the seal. Place it over the shaft and push the seal into place with a rotary motion.
5. Use the snap ring pliers J-5403 to install the shaft seal retaining ring with its flat side against the seal.
6. Remove any excess oil around the shaft and the inside of the compressor housing neck.
7. Install the clutch plate and hub assembly.
8. Reposition the compressor in its mounting.
9. Adjust the tension on the serpentine accessory drive belt.
10. Connect the negative battery cable.
11. Evacuate and recharge the A/C system. Refer to Discharging, Adding Oil, Evacuating, and Charging Procedure for A/C System.




12. Perform a leak test of the system. Refer to Leak Testing Refrigerant System. Leak Testing Refrigerant System