Spring Lock Coupling

Spring Lock Coupling:

SPECIAL TOOL(S)

DISCONNECT
1. Recover the refrigerant.







2. Remove the A/C tube lock coupling clip.







3. Using the special tool, disengage the spring lock coupling fittings.







4. Remove the O-ring seals with a non-metallic tool.

CAUTION: Do not use metal tools to remove the O-ring seals. They can cause axial scratches across the O-ring seal grooves resulting in refrigerant leaks.







5. Remove the A/C tube lock coupling spring with a small hooked wire.

CAUTION: Do not use a screwdriver or similar tool to remove the A/C tube lock coupling spring; this can cause axial scratches across the O-ring seal grooves resulting in refrigerant leaks.


CLEANING







1. Fabricate a cleaning tool from a 1/8 inch diameter brazing rod.







2. Cut an abrasive pad from maroon colored 3M Scotch Brite (R) with the dimensions corresponding to the coupling size.







3. Assemble the pad to the tool.
4. Coat the abrasive pad with PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231-B.
5. Roll the pad on the tool and install it in a variable speed motor drill.







6. Polish for one minute at moderate speed (less than 1,500 rpm) or until the surface is clean and free of scratches or foreign material.

CAUTION: Maintain low speed drill rotation when inserting or removing the cleaning tool to prevent axial scratches which may cause future leaks.

7. Clean the fitting with a lint-free cloth.
8. Inspect the surface for grooves or scratches. If grooves or scratches are still present, install a new component.







9. Clean the O-ring seal grooves with a 300 mm (12 inch) length of natural fiber string.
^ Loop the string around the grooves and pull the string back and forth.

10. Remove any foreign material from the grooves with a lint-free cloth.

CONNECT







1. Install the A/C tube lock coupling spring.







2. Lubricate the inside of the coupling with PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231-B.







3. Install the O-ring seals.
1 Lubricate the O-ring seals with PAG Refrigerant Compressor Oil (R-134a Systems) F7AZ-19589-DA (Motorcraft YN-12-C) or equivalent meeting Ford specification WSH-M1C231-B.

NOTE: Some connections may have two or three O-ring seals.

CAUTION: Use only new green O-ring seals. The use of any O-ring seals other than specified may result in intermittent leakage during vehicle operation.







4. Connect the spring lock coupling fittings with a twisting motion until the A/C tube lock coupling spring snaps over the flared end of the female fitting.







5. Install the A/C tube lock coupling clip.
6. Charge the system.