Shaft Seal
Shaft Seal DesignThe shaft seal is a lip seal, one piece design.
Seal Leak Detection
A shaft seal should not be changed because of an oil-line on the hood insulator. Only change a shaft seal when a leak is detected by evidence of oil sprayed in large amounts and then only after actual refrigerant leakage is found by using an approved leak Detector such as 3 29547 or equivalent.
On-Vehicle
Remove or Disconnect
1. Recover Refrigerant.
2. Loosen and reposition compressor in mounting brackets, if necessary.
3. Remove Clutch Plate and Hub assembly from compressor.
4. Remove the shaft seal seat retainer ring, using Snap Ring Pliers J 5403.
5. Thoroughly clean inside of compressor neck area and O-ring groove surrounding the shaft, the exposed portion of the seal seat and the shaft itself. Any dirt or foreign material getting into compressor may cause damage.
6. Remove Lip Seal:
Fully engage the knurled tangs of Seal Remover-Installer J 23128-A into the recessed portion of the Seal by turning the handle clockwise. Remove the Seal from the compressor with a rotary-pulling motion. Discard the Seal. The handle must be hand-tightened securely. Do not use a wrench or plier (Fig. 28).
7. Remove and discard the seal seat O-ring from the compressor, neck using O-ring Remover J 9553-1.
8. Recheck the shaft and inside of the compressor neck and O-ring groove for dirt or foreign material and be sure these areas are perfectly clean before installing new parts.
Inspection
Seals should not be reused. Always use a new specification service seal kit on rebuild. Care should be taken to prevent damage to the lip of the one piece seal. Make sure that the Seal Seat and Seal Lip are free of lint and dirt that could damage the seal surface or prevent sealing.
On-Vehicle
Install or Connect
1. Dip the new seal O-ring in clean 525 viscosity refrigerant oil and assemble onto O-ring Installer J 33011 (Fig. 28).
2. Insert the O-ring Installer J 33011 completely down into the compressor neck until the Installer "bottoms". Lower the moveable slide of the O-ring Installer to release the O-ring into the seal seat O-ring lower groove. (The compressor neck top groove is for the shaft seal retainer ring.) Rotate the Installer to seat the O-ring and remove the Installer.
3. Prepare Lip Seal:
- Assemble Lip Seal to Seal Installer, J 23128-A, (Fig. 28). The printed/stamped steel case side of Lip Seal must be engaged with knurled tangs of installer so that flared-out side of Lip Seal is facing and installed towards the compressor.
4. Install Lip Seal:
- Place Seal Protector J 34614 over end of compressor shaft and slide new seal onto the shaft until it stops (Fig 28). Disengage installer from seal and remove seal protector from compressor shaft.
NOTICE:, Handling and care of seal protector is important. If seal protector is nicked or the bottom flared, the new seal may be damaged during installation.
5. Install the new seal seat retainer ring with its flat side against the Seal Seat, using Snap-Ring Pliers J 5403 (Fig 29). Use the sleeve from O-ring Installer J 33011 to press in on the seal seat retainer ring so that it snaps into its groove.
6. Evacuate and charge system with 1 lb. refrigerant. Temporarily install the shaft nut and, with the compressor in horizontal position, rotate the compressor shaft in normal direction of rotation several times. Leak test the seal. Recover refrigerant and repair as necessary. Remove, discard and later replace the shaft nut.
7. Remove any excess oil, resulting from installing the new seal parts, from the shaft and inside the compressor neck.
8. Install the Clutch Plate and Hub assembly.
9. Reinstall compressor belt and tighten Bracketry.
10. Evacuate and Charge the Refrigerant System.
Off-Vehicle
Install or Connect
1. Follow applicable on-vehicle procedures.
2. To Leak Test, install leak Test Fixture J 9625-A (Fig. 30) on rear head of compressor and connect gage charging lines and J 38100-C Refrigerant Recovery System. Pressurize suction and high-side of compressor with Refrigerant-12 vapor to drum pressure. Temporarily install the shaft nut and turn compressor shaft in normal direction of rotation several times by hand. Leak test the seal area and correct any leak found. Recover the refrigerant. Remove shaft nut.