Coupler HVAC: Service and Repair

Spring Lock Coupling, Removal And Installation:

Two O-rings are used to seal between the two halves of the spring lock coupling. These O-rings are made of special material and must be replaced with an O-ring made of the same material. The O-rings normally used in refrigerant system connections are not the same material and should not be used with the spring lock coupling. Refer to the Spring Lock Coupling, Removal And Installation illustration for part number for 19.05 mm (3/4 inch) O-ring and for instructions to disconnect and connect the spring lock coupling.


SPECIAL SERVICE TOOLS REQUIRED

Spring Lock Coupling Disconnect Tool, 3/8 Inch:

Spring Lock Coupling Disconnect Tool, 1/2 Inch:

Spring Lock Coupling Disconnect Tool, 5/8 Inch:

Spring Lock Coupling Disconnect Tool, 3/4 Inch:

COUPLING - DISCONNECT
1. Recover refrigerant from system with a refrigerant recycling machine. Refrigerant Recovery Fit Spring Lock Coupling Disconnect Tools T81P-19623-G1 (3/8-inch), T81P-19623-G2 (1/2-inch), T83P-19623-C (5/8-inch), or T85L- 19623-A (3/4-inch) to the coupling.
2. Close tool and push into open side of cage to expand garter spring and release female fitting.

NOTE: The garter spring may not release if the tool is cocked while pushing it into the cage opening.

3. After garter spring is expanded, pull fitting apart.
4. Remove tool from disconnected coupling.







5. Remove O-ring seal from male fitting.

CAUTION: Use of metal O-Ring Tool T71P-19703-C or a screwdriver to remove O-rings can cause scratches across the O-ring groove, leading to loss of refrigerant charge. Only plastic O-Ring Tool F5VH-17B017-AA or equivalent is approved for O-ring removal.


COUPLING - CONNECT
1. Make sure garter spring is in cage of male fitting. If garter spring is missing, install a new spring by pushing it into cage opening. If garter spring is damaged, remove it from cage with a small wire hook (do not use a screwdriver) and install a new spring.
2. Clean all dirt or foreign material from both pieces of coupling.
3. Lubricate and install new green O-ring seals on male fitting.






Use only the green O-ring seals, as specified in the Service Parts List, as they are made of a special material. The use of any O-ring seal other than the specified green O-ring seal may allow the connection to leak intermittently during vehicle operation.

4. Lubricate male fitting and O-rings and inside of female fitting with clean refrigerant oil.
5. Install plastic indicator ring into cage opening if indicator ring is to be used.
6. Fit female fitting to male fitting and push until garter spring snaps over flared end of female fitting.

If plastic indicator ring is used, it will snap out of cage opening when coupling is connected to indicate engagement.

7. If indicator ring is not used, ensure coupling engagement by visually checking to verify garter spring is over flared end of female fitting.