C 3500 Truck 2WD V8-6.6L DSL Turbo VIN 1 (2002)
A/C Coupler O-ring: Service and Repair
O-Ring Replacement
REMOVAL PROCEDURE
1. Disassemble the A/C refrigerant components. Refer to the appropriate repair procedure
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For compression style fittings use a back up wrench on the fitting (2) and loosen the fitting nut (1).
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For banjo style fittings remove the bolt retaining the banjo type fitting.
2. Remove the O-ring seal from the A/C refrigerant component.
3. Inspect the O-ring seal for signs of damage to help determine the root cause of the failure.
4. Inspect the A/C refrigerant components for damage or burrs. Repair if necessary.
IMPORTANT: Cap or tape the open A/C refrigerant components immediately to prevent system contamination.
5. Cap or tape the A/C refrigerant components.
6. Discard the O-ring seal.
INSTALLATION PROCEDURE
1. Inspect the new O-ring seal for any sign or cracks, cuts, or damage. Replace if necessary.
2. Remove the cap or tape from the A/C refrigerant components.
3. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the A/C refrigerant components.
IMPORTANT: DO NOT allow any of the mineral base 525 viscosity refrigerant oil on the new O-ring seal to enter the refrigerant system.
4. Lightly coat the new O-ring seal with mineral base 525 viscosity refrigerant oil.
IMPORTANT: DO NOT reuse O-ring seals.
