FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Home >> Chevy Truck >> 2000 >> Express 1/2 Ton Van V8-305 5.0L VIN M SFI >> Repair and Diagnosis >> Heating and Air Conditioning >> Coupler HVAC >> A/C Coupler O-ring >> Service and Repair

A/C Coupler O-ring: Service and Repair

TOOLS REQUIRED
J 39400-A Leak Detector

REMOVAL PROCEDURE




1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging.
2. For compression-style fittings; use a back-up wrench on the A/C refrigerant component (smaller size) fitting (2), then loosen the A/C refrigerant hose (larger size) fitting (1).
3. For banjo-style fittings; remove the bolt retaining the A/C refrigerant hose to the A/C refrigerant component.

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

4. Disconnect the A/C refrigerant hose from the A/C refrigerant component discard the O-ring seal and cap or tape the A/C refrigerant hose and the A/C refrigerant component to prevent contamination.

INSTALLATION PROCEDURE




1. Remove the cap or tape from the A/C refrigerant hose and the A/C refrigerant component.
2. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the A/C refrigerant hose and the A/C refrigerant component.
3. Lightly coat the new O-ring seal (1) 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. For compression-style fittings; carefully slide the new O-ring seal (1) onto the A/C refrigerant hose until seated.




5. For banjo-style fittings; carefully slide the new O-ring seal (1) onto the A/C refrigerant hose until seated.
Leave a light coating of the refrigerant oil to remain on the A/C refrigerant hose in the area indicated (2) ONLY.




6. Install the A/C refrigerant hose to the A/C refrigerant component.
7. For compression-style fittings; use a back-up wrench on the A/C refrigerant component (smaller size) fitting (2), then tighten the A/C refrigerant hose (larger size) fitting (1) to specification.
8. For banjo-style fittings; install the bolt retaining the A/C refrigerant hose to the A/C refrigerant component, then tighten to specification.
9. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging.
10. Leak test the fitting(s) of the repaired or reinstalled component using the J 39400-A.
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