Shaft Seal Replacement

PREPARATION SST

The refrigerant system must be discharged prior to replacing compressor shaft seal.

Removal




1. Remove clutch hub retaining bolt. Use universal spanner wrench.




2. Remove the shaft seal felt from nose of compressor.
3. Blow any debris from inside the compressor nose with low pressure compressed air. Clean the inside and outside nose area of the compressor with a lint-free cloth to remove any oil or dirt.
4. Remove the shaft seal retaining snap ring from inside the compressor nose using SST.




5. Insert the SST into one of the snap ring eyes.




6. Rotate SST to position the tool tip and the snap ring eye closest to the compressor shaft.




7. keep the SST shaft against the side of the nose opening and remove the snap ring.




8. Position SST over compressor shaft and push the tool into the nose of compressor and down against shaft seal.




9. Engage end of tool with internal diameter of shaft seal. While holding the hex part of the tool, turn tool handle clockwise to expand tool tip inside seal inner radius. Then, pull shaft seal from the compressor with the tool.

Installation
1. Obtain a new shaft seal kit.

CAUTION:
- Do not allow any dirt or foreign materials to enter the compressor.

2. Using a clean lint4rne cloth, clean the compressor shaft and the seal pocket inside the compressor nose.

NOTE
- Inspect the shaft seal protector 49 UN01 045 for any burrs or any other damage. Do not use the protector if it is damaged.




3. Dip the shaft seal protector 49 UN01 045 and shaft seal in clean R-134a refrigerant oil. Position the shaft seal on the protector with the lip of the seal pointing toward the large end of the protector as shown.




4. Place the shaft seal protector 49 UN01 045 with shaft seal over the end of the compressor shaft.




5. Using Shaft Seal Installer 49 UN01 043, carefully push seal down shaft protector onto compressor shaft until seated.
6. Remove SSTs from compressor shaft.
7. Place a new shaft seal retaining snap ring into the compressor nose opening and seat the snap ring into the groove.
8. Leak test the shaft seal installation after rotating the compressor shaft about ten revolutions with the clutch hub.

Rotating Torque Check
1. Discharge refrigerant system. Observe all safety precautions.
2. Remove suction hose from A/C compressor. Use care not to allow dirt to enter A/C compressor.
3. Remove the A/C compressor from the vehicle. With the A/C clutch disengaged, rotate the compressor shaft one complete revolution and note the torque required to rotate the shaft another complete revolution.
4. If the rotational torque exceeds 13 N.m (1.3 kgf.m/9.6 lb-ft), replace the A/C compressor assembly.
5. If the rotational torque is less than specified, excessive drag does not exist in the A/C compressor. Install the suction hose, then leak test. Evacuate and recharge the system.
6. Check the system for proper operation.