Coupler HVAC: Service and Repair
COUPLING-DISCONNECT1. Remove refrigerant from system. Discharging and Recovery
2. Remove clip from spring lock coupling.
3. Fit Spring Lock Coupling Disconnect Tool 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.
4. 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.
5. After garter spring is expanded, pull fitting apart.
6. Remove tool from disconnected coupling.
COUPLING-CONNECT
1. Check to 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 new spring.
2. Clean all dirt or foreign material from both pieces of coupling.
3. On the female spring lock design, check the inside of each fitting for scratches, corrosion or debris from deteriorated O-rings. If scratches, corrosion or debris are found, the fitting should be cleaned as follows:
a. Remove any surface residue from the inside of the female spring lock coupling by polishing with 400-grit emery cloth or equivalent. Polish the female surface by using a twisting motion so that any scratches made will not cross the O-ring sealing surface.
b. Perform additional polishing of surface using 600-grit emery cloth or equivalent.
c. All residue from the polishing operations should be removed from the fitting by wiping with a lint-free cloth.
4. Remove the green O-ring seals from the male fitting using Plastic O-Ring Tool F5VH-17B017-AA or equivalent. Do not use a metal O-ring tool or other type of metal tool such as a screwdriver or pick. They could cause axial scratches across the O-ring grooves, resulting in refrigerant leaks.
5. Lubricate and install new green O-ring seals on male fitting.
NOTE: Use only the specified green O-ring seals because 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.
6. Lubricate male fitting and green O-ring seals and inside of female fitting with clean refrigerant oil.
7. Install plastic indicator ring into cage opening if indicator ring is to be used.
8. Fit female fitting to male fitting and push with a twisting motion 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.
9. If indicator ring is not used, check coupling engagement by making sure the garter spring is over flared end of female fitting.
10. Install clip to spring lock coupling.