Coupler HVAC: Service and Repair

O-RING REPLACEMENT

TOOLS REQUIRED
J 39400-A Halogen Leak Detector

REMOVAL PROCEDURE




1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. Disconnect the A/C refrigerant line.
^ For compression style fittings use a back up wrench on the fitting (2) and loosen the fitting nut (1).
^ For banjo style fittings remove the bolt retaining the banjo type fitting.

IMPORTANT: Cap or tape the open A/C refrigerant line and the A/C refrigerant component immediately.

3. Disconnect the A/C line from the A/C component.
4. Cap or tape the A/C line and the A/C component to prevent system contamination, discard the O-ring seals.

INSTALLATION PROCEDURE




1. Remove the cap or tape from the A/C line and the A/C component.
2. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the A/C refrigerant line and the A/C refrigerant component.
3. Lightly coat the new O-ring seal with mineral base 525 viscosity refrigerant oil.

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. Carefully slide the new O-ring seal onto the A/C refrigerant line.
5. The O-ring seal must be fully seated.




6. Connect the A/C line.
^ For compression style fittings use a back up wrench on the fitting (2) and tighten the fitting nut (1) to specification.
^ For banjo style fittings install the bolt retaining the banjo type fitting and tighten to specification.
7. Evacuate and recharge the refrigerant. Refer to Refrigerant Recovery and Recharging.
8. Leak test the fittings of the component using J 39400-A.