Spring Lock Coupling

Special Tool(s)

Spring Lock Coupling Disconnect Tool Set 412-039 (T84L-19623-B)

Disconnect

1. Recover the refrigerant. Refer to Discharging and Recovery in this section.

2. Remove the A/C tube lock coupling clip (19E746).

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

4.  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.

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

5.  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.

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

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® with the dimensions corresponding to the coupling size.

   Coupling Size	Pad Size
   3/8 inch	25 x 50 mm (1 x 2 inch)
   1/2 inch	25 x 50 mm (1 x 2 inch)
   5/8 inch	25 x 76 mm (1 x 3 inch)
   3/4 inch	25 x 102 mm (1 x 4 inch)

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

   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.

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.  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.

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

   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.

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. Refer to Air Conditioning (A/C) System Evacuation And Charging in this section.